\begin{thebibliography}{100}
\expandafter\ifx\csname url\endcsname\relax
  \def\url#1{\texttt{#1}}\fi
\expandafter\ifx\csname urlprefix\endcsname\relax\def\urlprefix{URL }\fi
\providecommand{\bibinfo}[2]{#2}
\providecommand{\eprint}[2][]{\url{#2}}

\bibitem{Schrodinger1935}
\bibinfo{author}{Schr{\"{o}}dinger, E.}
\newblock \bibinfo{title}{{Discussion of probability relations between
  separated systems}}.
\newblock \emph{\bibinfo{journal}{Mathematical Proceedings of the Cambridge
  Philosophical Society}} \textbf{\bibinfo{volume}{31}},
  \bibinfo{pages}{555--563} (\bibinfo{year}{1935}).

\bibitem{Heisenberg1927}
\bibinfo{author}{Heisenberg, W.}
\newblock \bibinfo{title}{{The actual content of quantum theoretical kinematics
  and mechanics}}  (\bibinfo{year}{1927}).

\bibitem{Boto2000}
\bibinfo{author}{Boto, A.~N.}, \bibinfo{author}{Kok, P.},
  \bibinfo{author}{Abrams, D.~S.} \& \bibinfo{author}{Braunstein, S.~L.}
\newblock \bibinfo{title}{{Quantum interferometric optical lithography:
  exploiting entanglement to beat the diffraction limit}}.
\newblock \emph{\bibinfo{journal}{Physical Review Letters}}
  \textbf{\bibinfo{volume}{85}}, \bibinfo{pages}{2733--2736}
  (\bibinfo{year}{2000}).

\bibitem{Lee2002}
\bibinfo{author}{Lee, H.}, \bibinfo{author}{Kok, P.}, \bibinfo{author}{Cerf,
  N.~J.} \& \bibinfo{author}{Dowling, J.~P.}
\newblock \bibinfo{title}{{Linear optics and projective measurements alone
  suffice to create large-photon-number path entanglement}}.
\newblock \emph{\bibinfo{journal}{Physical Review A}}
  \textbf{\bibinfo{volume}{65}}, \bibinfo{pages}{030101}
  (\bibinfo{year}{2002}).

\bibitem{GHZ1989}
\bibinfo{author}{Greenberger, D.~M.}, \bibinfo{author}{Horne, M.~A.} \&
  \bibinfo{author}{Zeilinger, A.}
\newblock \bibinfo{title}{{Going beyond Bell's theorem}}.
\newblock In \emph{\bibinfo{booktitle}{Bell's Theorem, Quantum Theory and
  Conceptions of the Universe}}, \bibinfo{pages}{69--72}
  (\bibinfo{publisher}{Springer}, \bibinfo{address}{Dordrecht},
  \bibinfo{year}{1989}).

\bibitem{Gerry2001}
\bibinfo{author}{Gerry, C.~C.} \& \bibinfo{author}{Campos, R.~A.}
\newblock \bibinfo{title}{{Generation of maximally entangled photonic states
  with a quantum-optical Fredkin gate}}.
\newblock \emph{\bibinfo{journal}{Physical Review A}}
  \textbf{\bibinfo{volume}{64}}, \bibinfo{pages}{063814}
  (\bibinfo{year}{2001}).

\bibitem{Fiurasek2002}
\bibinfo{author}{Fiur{\'{a}}{\v{s}}ek, J.}
\newblock \bibinfo{title}{{Conditional generation of N -photon entangled states
  of light}}.
\newblock \emph{\bibinfo{journal}{Physical Review A}}
  \textbf{\bibinfo{volume}{65}}, \bibinfo{pages}{053818}
  (\bibinfo{year}{2002}).

\bibitem{Zou2002}
\bibinfo{author}{Zou, X.~B.}, \bibinfo{author}{Pahlke, K.} \&
  \bibinfo{author}{Mathis, W.}
\newblock \bibinfo{title}{{Generation of multi-photon entangled states by using
  linear optical elements}}.
\newblock \emph{\bibinfo{journal}{Physics Review A}}
  \textbf{\bibinfo{volume}{306}}, \bibinfo{pages}{014102}
  (\bibinfo{year}{2002}).

\bibitem{Kok2002}
\bibinfo{author}{Kok, P.}, \bibinfo{author}{Lee, H.} \&
  \bibinfo{author}{Dowling, J.~P.}
\newblock \bibinfo{title}{{Creation of large-photon-number path entanglement
  conditioned on photodetection}}.
\newblock \emph{\bibinfo{journal}{Physical Review A}}
  \textbf{\bibinfo{volume}{65}}, \bibinfo{pages}{052104}
  (\bibinfo{year}{2002}).

\bibitem{Pryde2003}
\bibinfo{author}{Pryde, G.~J.} \& \bibinfo{author}{White, A.~G.}
\newblock \bibinfo{title}{{Creation of maximally entangled photon-number states
  using optical fiber multiports}}.
\newblock \emph{\bibinfo{journal}{Physical Review A}}
  \textbf{\bibinfo{volume}{68}}, \bibinfo{pages}{052315}
  (\bibinfo{year}{2003}).

\bibitem{Shafiei2004}
\bibinfo{author}{Shafiei, F.}, \bibinfo{author}{Srinivasan, P.} \&
  \bibinfo{author}{Ou, Z.~Y.}
\newblock \bibinfo{title}{{Generation of three-photon entangled state by
  quantum interference between a coherent state and parametric
  down-conversion}}.
\newblock \emph{\bibinfo{journal}{Physical Review A}}
  \textbf{\bibinfo{volume}{70}}, \bibinfo{pages}{043803}
  (\bibinfo{year}{2004}).

\bibitem{Eisenberg2005}
\bibinfo{author}{Eisenberg, H.~S.}, \bibinfo{author}{Hodelin, J.~F.},
  \bibinfo{author}{Khoury, G.} \& \bibinfo{author}{Bouwmeester, D.}
\newblock \bibinfo{title}{{Multiphoton path entanglement by nonlocal
  bunching}}.
\newblock \emph{\bibinfo{journal}{Physical Review Letters}}
  \textbf{\bibinfo{volume}{94}}, \bibinfo{pages}{090502}
  (\bibinfo{year}{2005}).

\bibitem{Sun2006}
\bibinfo{author}{Sun, F.~W.}, \bibinfo{author}{Ou, Z.~Y.} \&
  \bibinfo{author}{Guo, G.~C.}
\newblock \bibinfo{title}{{Projection measurement of the maximally entangled N
  -photon state for a demonstration of the N -photon de Broglie wavelength}}.
\newblock \emph{\bibinfo{journal}{Physical Review A}}
  \textbf{\bibinfo{volume}{73}}, \bibinfo{pages}{023808}
  (\bibinfo{year}{2006}).

\bibitem{Kapale2007}
\bibinfo{author}{Kapale, K.~T.} \& \bibinfo{author}{Dowling, J.~P.}
\newblock \bibinfo{title}{{Bootstrapping approach for generating maximally
  path-entangled photon states}}.
\newblock \emph{\bibinfo{journal}{Physical Review Letters}}
  \textbf{\bibinfo{volume}{99}}, \bibinfo{pages}{053602}
  (\bibinfo{year}{2007}).

\bibitem{Nielsen2007}
\bibinfo{author}{Nielsen, A. E.~B.} \& \bibinfo{author}{M{\o}lmer, K.}
\newblock \bibinfo{title}{{Conditional generation of path-entangled optical
  |N,0{\textgreater} + |0,N{\textgreater} states}}.
\newblock \emph{\bibinfo{journal}{Physical Review A}}
  \textbf{\bibinfo{volume}{75}}, \bibinfo{pages}{063803}
  (\bibinfo{year}{2007}).

\bibitem{Hofmann2007}
\bibinfo{author}{Hofmann, H.~F.} \& \bibinfo{author}{Ono, T.}
\newblock \bibinfo{title}{{High-photon-number path entanglement in the
  interference of spontaneously down-converted photon pairs with coherent laser
  light}}.
\newblock \emph{\bibinfo{journal}{Physical Review A}}
  \textbf{\bibinfo{volume}{76}}, \bibinfo{pages}{031806}
  (\bibinfo{year}{2007}).

\bibitem{Ono2008}
\bibinfo{author}{Ono, T.} \& \bibinfo{author}{Hofmann, H.~F.}
\newblock \bibinfo{title}{{Quantum enhancement of N-photon phase sensitivity by
  interferometric addition of down-converted photon pairs to weak coherent
  light}}.
\newblock \emph{\bibinfo{journal}{Journal of Physics B: Atomic, Molecular and
  Optical Physics}} \textbf{\bibinfo{volume}{41}}, \bibinfo{pages}{095502}
  (\bibinfo{year}{2008}).

\bibitem{Wolfgramm2010}
\bibinfo{author}{Wolfgramm, F.}, \bibinfo{author}{Cere, A.} \&
  \bibinfo{author}{Mitchell, M.~W.}
\newblock \bibinfo{title}{{NOON states from cavity-enhanced down-conversion:
  high quality and super-resolution}}.
\newblock \emph{\bibinfo{journal}{Journal of the Optical Society of America B}}
  \textbf{\bibinfo{volume}{27}}, \bibinfo{pages}{A25--A29}
  (\bibinfo{year}{2010}).

\bibitem{Kok2011}
\bibinfo{author}{Kok, P.}
\newblock \bibinfo{title}{{Creating large NOON states with imperfect phase
  control}}.
\newblock \emph{\bibinfo{journal}{Optics and Spectroscopy}}
  \textbf{\bibinfo{volume}{111}}, \bibinfo{pages}{520--522}
  (\bibinfo{year}{2011}).

\bibitem{Mullin2011}
\bibinfo{author}{Mullin, W.~J.} \& \bibinfo{author}{Lalo{\"{e}}, F.}
\newblock \bibinfo{title}{{Creation of NOON states by double
  Fock-state/Bose-Einstein condensates}}.
\newblock \emph{\bibinfo{journal}{Journal of Low Temperature Physics}}
  \textbf{\bibinfo{volume}{162}}, \bibinfo{pages}{250--257}
  (\bibinfo{year}{2011}).

\bibitem{Walther2004}
\bibinfo{author}{Walther, P.} \emph{et~al.}
\newblock \bibinfo{title}{{De Broglie wavelength of a non-local four-photon
  state}}.
\newblock \emph{\bibinfo{journal}{Nature}} \textbf{\bibinfo{volume}{429}},
  \bibinfo{pages}{158--161} (\bibinfo{year}{2004}).

\bibitem{Mitchell2004}
\bibinfo{author}{Mitchell, M.~W.}, \bibinfo{author}{Lundeen, J.~S.} \&
  \bibinfo{author}{Steinberg, A.~M.}
\newblock \bibinfo{title}{{Super-resolving phase measurements with a
  multiphoton entangled state}}.
\newblock \emph{\bibinfo{journal}{Nature}} \textbf{\bibinfo{volume}{429}},
  \bibinfo{pages}{161--164} (\bibinfo{year}{2004}).

\bibitem{Afek2010}
\bibinfo{author}{Afek, I.}, \bibinfo{author}{Ambar, O.} \&
  \bibinfo{author}{Silberberg, Y.}
\newblock \bibinfo{title}{{High-NOON states by mixing quantum and classical
  light}}.
\newblock \emph{\bibinfo{journal}{Science}} \textbf{\bibinfo{volume}{328}},
  \bibinfo{pages}{879--881} (\bibinfo{year}{2010}).

\bibitem{Tsang2009}
\bibinfo{author}{Tsang, M.}
\newblock \bibinfo{title}{{Quantum imaging beyond the diffraction limit by
  optical centroid measurements}}.
\newblock \emph{\bibinfo{journal}{Physical Review Letters}}
  \textbf{\bibinfo{volume}{102}}, \bibinfo{pages}{253601}
  (\bibinfo{year}{2009}).

\bibitem{Shin2011}
\bibinfo{author}{Shin, H.}, \bibinfo{author}{Chan, K. W.~C.},
  \bibinfo{author}{Chang, H.~J.} \& \bibinfo{author}{Boyd, R.~W.}
\newblock \bibinfo{title}{{Quantum spatial superresolution by optical centroid
  measurements}}.
\newblock \emph{\bibinfo{journal}{Physical Review Letters}}
  \textbf{\bibinfo{volume}{107}}, \bibinfo{pages}{083603}
  (\bibinfo{year}{2011}).

\bibitem{Rozema2014}
\bibinfo{author}{Rozema, L.~A.} \emph{et~al.}
\newblock \bibinfo{title}{{Scalable spatial superresolution using entangled
  photons}}.
\newblock \emph{\bibinfo{journal}{Physical Review Letters}}
  \textbf{\bibinfo{volume}{112}}, \bibinfo{pages}{223602}
  (\bibinfo{year}{2014}).

\bibitem{Kok2004}
\bibinfo{author}{Kok, P.}, \bibinfo{author}{Braunstein, S.~L.} \&
  \bibinfo{author}{Dowling, J.~P.}
\newblock \bibinfo{title}{{Quantum lithography, entanglement and
  Heisenberg-limited parameter estimation}}.
\newblock \emph{\bibinfo{journal}{Journal of Optics B: Quantum and
  Semiclassical Optics}} \textbf{\bibinfo{volume}{6}}, \bibinfo{pages}{S811}
  (\bibinfo{year}{2004}).

\bibitem{Giovannetti2004}
\bibinfo{author}{Giovannetti, V.}, \bibinfo{author}{Lloyd, S.} \&
  \bibinfo{author}{Maccone, L.}
\newblock \bibinfo{title}{{Quantum enhanced measurement: beating the standard
  quantum limit}}.
\newblock \emph{\bibinfo{journal}{Science}} \textbf{\bibinfo{volume}{306}},
  \bibinfo{pages}{1330--1336} (\bibinfo{year}{2004}).

\bibitem{Nagata2007}
\bibinfo{author}{Nagata, T.}, \bibinfo{author}{Okamoto, R.},
  \bibinfo{author}{O'Brien, J.~L.}, \bibinfo{author}{Sasaki, K.} \&
  \bibinfo{author}{Takeuchi, S.}
\newblock \bibinfo{title}{{Beating the standard quantum limit with
  four-entangled photons}}.
\newblock \emph{\bibinfo{journal}{Science}} \textbf{\bibinfo{volume}{316}},
  \bibinfo{pages}{726--729} (\bibinfo{year}{2007}).

\bibitem{Okamoto2008}
\bibinfo{author}{Okamoto, R.} \emph{et~al.}
\newblock \bibinfo{title}{{Beating the standard quantum limit: phase
  super-sensitivity of N-photon interferometers}}.
\newblock \emph{\bibinfo{journal}{New Journal of Physics}}
  \textbf{\bibinfo{volume}{10}}, \bibinfo{pages}{073033}
  (\bibinfo{year}{2008}).

\bibitem{Nasr2009}
\bibinfo{author}{Nasr, M.~B.} \emph{et~al.}
\newblock \bibinfo{title}{{Quantum optical coherence tomography of a biological
  sample}}.
\newblock \emph{\bibinfo{journal}{Optics Communications}}
  \textbf{\bibinfo{volume}{282}}, \bibinfo{pages}{1154--1159}
  (\bibinfo{year}{2009}).

\bibitem{Crespi2012}
\bibinfo{author}{Crespi, A.} \emph{et~al.}
\newblock \bibinfo{title}{{Measuring protein concentration with entangled
  photons}}.
\newblock \emph{\bibinfo{journal}{Applied Physics Letters}}
  \textbf{\bibinfo{volume}{100}}, \bibinfo{pages}{233704}
  (\bibinfo{year}{2012}).

\bibitem{Schwartz2013}
\bibinfo{author}{Schwartz, O.} \emph{et~al.}
\newblock \bibinfo{title}{{Superresolution microscopy with quantum emitters}}.
\newblock \emph{\bibinfo{journal}{Nano Letters}} \textbf{\bibinfo{volume}{13}},
  \bibinfo{pages}{5832--5836} (\bibinfo{year}{2013}).

\bibitem{Cui2013}
\bibinfo{author}{Cui, J.~M.}, \bibinfo{author}{Sun, F.~W.},
  \bibinfo{author}{Chen, X.~D.}, \bibinfo{author}{Gong, Z.~J.} \&
  \bibinfo{author}{Cuo, G.~C.}
\newblock \bibinfo{title}{{Quantum statistical imaging of particles without
  restriction of the diffraction limit}}.
\newblock \emph{\bibinfo{journal}{Physical Review Lettersc}}
  \textbf{\bibinfo{volume}{110}}, \bibinfo{pages}{153901}
  (\bibinfo{year}{2013}).

\bibitem{Ono2013}
\bibinfo{author}{Ono, T.}, \bibinfo{author}{Okamoto, R.} \&
  \bibinfo{author}{Takeuchi, S.}
\newblock \bibinfo{title}{{An entanglement-enhanced microscope}}.
\newblock \emph{\bibinfo{journal}{Nature Communications}}
  \textbf{\bibinfo{volume}{4}}, \bibinfo{pages}{3426} (\bibinfo{year}{2013}).

\bibitem{Israel2014}
\bibinfo{author}{Israel, Y.}, \bibinfo{author}{Rosen, S.} \&
  \bibinfo{author}{Silberberg, Y.}
\newblock \bibinfo{title}{{Supersensitive polarization microscopy using NOON
  states of light}}.
\newblock \emph{\bibinfo{journal}{Physical Review Letters}}
  \textbf{\bibinfo{volume}{112}}, \bibinfo{pages}{103604}
  (\bibinfo{year}{2014}).

\bibitem{Lee2015}
\bibinfo{author}{Lee, S.-Y.}, \bibinfo{author}{Lee, C.-w.},
  \bibinfo{author}{Nha, H.} \& \bibinfo{author}{Kaszlikowski, D.}
\newblock \bibinfo{title}{{Quantum phase estimation using a multi-headed cat
  state}}.
\newblock \emph{\bibinfo{journal}{Journal of the Optical Society of America B}}
  \textbf{\bibinfo{volume}{32}}, \bibinfo{pages}{1186--1192}
  (\bibinfo{year}{2015}).

\bibitem{Holland1993}
\bibinfo{author}{Holland, M.~J.} \& \bibinfo{author}{Burnett, K.}
\newblock \bibinfo{title}{{Interferometric detection of optical phase shifts at
  the Heisenberg limit}}.
\newblock \emph{\bibinfo{journal}{Physical Review Letters}}
  \textbf{\bibinfo{volume}{71}}, \bibinfo{pages}{1355--1358}
  (\bibinfo{year}{1993}).

\bibitem{Datta2011}
\bibinfo{author}{Datta, A.} \emph{et~al.}
\newblock \bibinfo{title}{{Quantum metrology with imperfect states and
  detectors}}.
\newblock \emph{\bibinfo{journal}{Physical Review A}}
  \textbf{\bibinfo{volume}{83}}, \bibinfo{pages}{063836}
  (\bibinfo{year}{2011}).

\bibitem{Xiang2013}
\bibinfo{author}{Xiang, G.~Y.}, \bibinfo{author}{Hofmann, H.~F.} \&
  \bibinfo{author}{Pryde, G.~J.}
\newblock \bibinfo{title}{{Optimal multi-photon phase sensing with a single
  interference fringe}}.
\newblock \emph{\bibinfo{journal}{Scientific Reports}}
  \textbf{\bibinfo{volume}{3}}, \bibinfo{pages}{2684} (\bibinfo{year}{2013}).

\bibitem{Joo2011}
\bibinfo{author}{Joo, J.}, \bibinfo{author}{Munro, W.~J.} \&
  \bibinfo{author}{Spiller, T.~P.}
\newblock \bibinfo{title}{{Quantum metrology with entangled coherent states}}.
\newblock \emph{\bibinfo{journal}{Physical Review Letters}}
  \textbf{\bibinfo{volume}{107}}, \bibinfo{pages}{083601}
  (\bibinfo{year}{2011}).

\bibitem{Joo2012}
\bibinfo{author}{Joo, J.} \emph{et~al.}
\newblock \bibinfo{title}{{Quantum metrology for nonlinear phase shifts with
  entangled coherent states}}.
\newblock \emph{\bibinfo{journal}{Physical Review A}}
  \textbf{\bibinfo{volume}{86}}, \bibinfo{pages}{043828}
  (\bibinfo{year}{2012}).

\bibitem{Zhang2013}
\bibinfo{author}{Zhang, Y.~R.}, \bibinfo{author}{Jin, G.~R.},
  \bibinfo{author}{Cao, J.~P.}, \bibinfo{author}{Liu, W.~M.} \&
  \bibinfo{author}{Fan, H.}
\newblock \bibinfo{title}{{Unbounded quantum Fisher information in two-path
  interferometry with finite photon number}}.
\newblock \emph{\bibinfo{journal}{Journal of Physics A: Mathematical and
  Theoretical}} \textbf{\bibinfo{volume}{46}}, \bibinfo{pages}{035302}
  (\bibinfo{year}{2013}).

\bibitem{Shepard2016}
\bibinfo{author}{Shepard, S.~R.}, \bibinfo{author}{Moxley, F. I.~I.} \&
  \bibinfo{author}{Dowling, J.~P.}
\newblock \bibinfo{title}{{Quantum phase representation of Heisenberg limits
  and a minimally resourced quantum phase estimator}}.
\newblock \emph{\bibinfo{journal}{Physical Review A}}
  \textbf{\bibinfo{volume}{93}}, \bibinfo{pages}{033805}
  (\bibinfo{year}{2016}).

\bibitem{Humphreys2013}
\bibinfo{author}{Humphreys, P.~C.}, \bibinfo{author}{Barbieri, M.},
  \bibinfo{author}{Datta, A.} \& \bibinfo{author}{Walmsley, I.~A.}
\newblock \bibinfo{title}{{Quantum enhanced multiple phase estimation}}.
\newblock \emph{\bibinfo{journal}{Physical Review Letters}}
  \textbf{\bibinfo{volume}{111}}, \bibinfo{pages}{070403}
  (\bibinfo{year}{2013}).

\bibitem{Yue2014}
\bibinfo{author}{Yue, J.~D.}, \bibinfo{author}{Zhang, Y.~R.} \&
  \bibinfo{author}{Fan, H.}
\newblock \bibinfo{title}{{Quantum-enhanced metrology for multiple phase
  estimation with noise}}.
\newblock \emph{\bibinfo{journal}{Scientific Reports}}
  \textbf{\bibinfo{volume}{4}}, \bibinfo{pages}{5933} (\bibinfo{year}{2014}).

\bibitem{Motes2015}
\bibinfo{author}{Motes, K.~R.} \emph{et~al.}
\newblock \bibinfo{title}{{Linear optical quantum metrology with single
  photons: exploiting spontaneously generated entanglement to beat the
  shot-noise limit}}.
\newblock \emph{\bibinfo{journal}{Physical Review Letters}}
  \textbf{\bibinfo{volume}{114}}, \bibinfo{pages}{170802}
  (\bibinfo{year}{2015}).

\bibitem{Liu2015}
\bibinfo{author}{Liu, J.}, \bibinfo{author}{Jing, X.~X.} \&
  \bibinfo{author}{Wang, X.}
\newblock \bibinfo{title}{{Quantum metrology with unitary parametrization
  processes}}.
\newblock \emph{\bibinfo{journal}{Scientific Reports}}
  \textbf{\bibinfo{volume}{5}}, \bibinfo{pages}{8565} (\bibinfo{year}{2015}).

\bibitem{Ciampini2016}
\bibinfo{author}{Ciampini, M.~A.} \emph{et~al.}
\newblock \bibinfo{title}{{Quantum-enhanced multiparameter estimation in
  multiarm interferometers}}.
\newblock \emph{\bibinfo{journal}{Scientific Reports}}
  \textbf{\bibinfo{volume}{6}}, \bibinfo{pages}{28881} (\bibinfo{year}{2016}).

\bibitem{Knott2016}
\bibinfo{author}{Knott, P.~A.} \emph{et~al.}
\newblock \bibinfo{title}{{Local versus global strategies in multiparameter
  estimation}}.
\newblock \emph{\bibinfo{journal}{Physical Review A}}
  \textbf{\bibinfo{volume}{94}}, \bibinfo{pages}{062312}
  (\bibinfo{year}{2016}).

\bibitem{Gagatsos2016}
\bibinfo{author}{Gagatsos, C.~N.}, \bibinfo{author}{Branford, D.} \&
  \bibinfo{author}{Datta, A.}
\newblock \bibinfo{title}{{Gaussian systems for quantum-enhanced multiple phase
  estimation}}.
\newblock \emph{\bibinfo{journal}{Physical Review A}}
  \textbf{\bibinfo{volume}{94}}, \bibinfo{pages}{042342}
  (\bibinfo{year}{2016}).

\bibitem{Szczykulska2016}
\bibinfo{author}{Szczykulska, M.}, \bibinfo{author}{Baumgratz, T.} \&
  \bibinfo{author}{Datta, A.}
\newblock \bibinfo{title}{{Multi-parameter quantum metrology}}.
\newblock \emph{\bibinfo{journal}{Advances in Physics: X}}
  \textbf{\bibinfo{volume}{1}}, \bibinfo{pages}{621--639}
  (\bibinfo{year}{2016}).

\bibitem{Liu2016}
\bibinfo{author}{Liu, J.}, \bibinfo{author}{Lu, X.~M.}, \bibinfo{author}{Sun,
  Z.} \& \bibinfo{author}{Wang, X.}
\newblock \bibinfo{title}{{Quantum multiparameter metrology with generalized
  entangled coherent state}}.
\newblock \emph{\bibinfo{journal}{Journal of Physics A: Mathematical and
  Theoretical}} \textbf{\bibinfo{volume}{49}}, \bibinfo{pages}{115302}
  (\bibinfo{year}{2016}).

\bibitem{Zhang2016FiO}
\bibinfo{author}{Zhang, L.}, \bibinfo{author}{Chan, K. W.~C.} \&
  \bibinfo{author}{Verma, P.~K.}
\newblock \bibinfo{title}{{Quantum Multiple Phase Estimation Using Balanced
  Multi-mode Entangled States}}.
\newblock In \emph{\bibinfo{booktitle}{Frontiers in Optics/Laser Science
  (FiO/LS)}}, \bibinfo{pages}{Paper JW4A.194} (\bibinfo{address}{Rochester,
  NY}, \bibinfo{year}{2016}).

\bibitem{Zhang2017}
\bibinfo{author}{Zhang, L.} \& \bibinfo{author}{Chan, K. W.~C.}
\newblock \bibinfo{title}{{Quantum multiparameter estimation with generalized
  balanced multimode NOON-like states}}.
\newblock \emph{\bibinfo{journal}{Physical Review A}}
  \textbf{\bibinfo{volume}{95}}, \bibinfo{pages}{032321}
  (\bibinfo{year}{2017}).
\newblock \eprint{arXiv:1703.00063v1}.

\bibitem{You2017}
\bibinfo{author}{You, C.} \emph{et~al.}
\newblock \bibinfo{title}{{Multiparameter estimation with single photons -
  linearly-optically generated quantum entanglement beats the shotnoise
  limit}}.
\newblock \emph{\bibinfo{journal}{Journal of Optics}}
  \textbf{\bibinfo{volume}{19}}, \bibinfo{pages}{124002}
  (\bibinfo{year}{2017}).

\bibitem{Walls2007}
\bibinfo{author}{Walls, D.~F.} \& \bibinfo{author}{Milburn, G.~J.}
\newblock \emph{\bibinfo{title}{{Quantum Optics}}}
  (\bibinfo{publisher}{Springer Science {\&} Business Media},
  \bibinfo{year}{2007}).

\bibitem{Hofheinz2008}
\bibinfo{author}{Hofheinz, M.} \emph{et~al.}
\newblock \bibinfo{title}{{Generation of Fock states in a superconducting
  quantum circuit}}.
\newblock \emph{\bibinfo{journal}{Nature}} \textbf{\bibinfo{volume}{454}},
  \bibinfo{pages}{310--314} (\bibinfo{year}{2008}).

\bibitem{Motes2016}
\bibinfo{author}{Motes, K.~R.} \emph{et~al.}
\newblock \bibinfo{title}{{Efficient recycling strategies for preparing large
  Fock states from single-photon sources: applications to quantum metrology}}.
\newblock \emph{\bibinfo{journal}{Physical Review A}}
  \textbf{\bibinfo{volume}{94}}, \bibinfo{pages}{012344}
  (\bibinfo{year}{2016}).

\bibitem{Michler2000}
\bibinfo{author}{Michler, P.} \emph{et~al.}
\newblock \bibinfo{title}{{A quantum dot single-photon turnstile device}}.
\newblock \emph{\bibinfo{journal}{Science}} \textbf{\bibinfo{volume}{290}},
  \bibinfo{pages}{2282--2285} (\bibinfo{year}{2000}).

\bibitem{Hong1986}
\bibinfo{author}{Hong, C.~K.} \& \bibinfo{author}{Mandel, L.}
\newblock \bibinfo{title}{{Experimental realization of a localized one-photon
  state}}.
\newblock \emph{\bibinfo{journal}{Physical Review Letters}}
  \textbf{\bibinfo{volume}{56}}, \bibinfo{pages}{58} (\bibinfo{year}{1986}).

\bibitem{Scully1997}
\bibinfo{author}{Scully, M.~O.} \& \bibinfo{author}{Zubairy, M.~S.}
\newblock \emph{\bibinfo{title}{{Quantum optics}}}
  (\bibinfo{publisher}{Cambridge University Press}, \bibinfo{year}{1997}).

\bibitem{Miller1973}
\bibinfo{author}{Miller, W.}
\newblock \emph{\bibinfo{title}{{Symmetry groups and their applications}}}
  (\bibinfo{publisher}{Academic Press}, \bibinfo{year}{1973}).

\bibitem{Truax1985}
\bibinfo{author}{Truax, D.~R.}
\newblock \bibinfo{title}{{Baker-Campbell-Hausdorff relations and unitarity of
  SU (2) and SU (1, 1) squeeze operators}}.
\newblock \emph{\bibinfo{journal}{Physical Review D}}
  \textbf{\bibinfo{volume}{31}}, \bibinfo{pages}{1988} (\bibinfo{year}{1985}).

\bibitem{Wu1986}
\bibinfo{author}{Wu, L.~A.}, \bibinfo{author}{Kimble, H.~J.},
  \bibinfo{author}{Hall, J.~L.} \& \bibinfo{author}{Wu, H.}
\newblock \bibinfo{title}{{Generation of squeezed states by parametric down
  conversion}}.
\newblock \emph{\bibinfo{journal}{Physical Review Letters}}
  \textbf{\bibinfo{volume}{57}}, \bibinfo{pages}{2520} (\bibinfo{year}{1986}).

\bibitem{Hong1987}
\bibinfo{author}{Hong, C.~K.}, \bibinfo{author}{Ou, Z.~Y.} \&
  \bibinfo{author}{Mandel, L.}
\newblock \bibinfo{title}{{Measurement of subpicosecond time intervals between
  two ohotons by interference}}.
\newblock \emph{\bibinfo{journal}{Physical Review Letters}}
  \textbf{\bibinfo{volume}{59}}, \bibinfo{pages}{2044} (\bibinfo{year}{1987}).

\bibitem{Nielsen2010}
\bibinfo{author}{Nielsen, M.~A.} \& \bibinfo{author}{Chuang, I.~L.}
\newblock \emph{\bibinfo{title}{{Quantum Computation and Quantum Information}}}
  (\bibinfo{publisher}{Cambridge university press}, \bibinfo{year}{2010}).

\bibitem{Sanaka2006}
\bibinfo{author}{Sanaka, K.}, \bibinfo{author}{Resch, K.~J.} \&
  \bibinfo{author}{Zeilinger, A.}
\newblock \bibinfo{title}{{Filtering out photonic fock states}}.
\newblock \emph{\bibinfo{journal}{Physical Review Letters}}
  \textbf{\bibinfo{volume}{96}}, \bibinfo{pages}{083601}
  (\bibinfo{year}{2006}).

\bibitem{Helstrom1976}
\bibinfo{author}{Helstrom, C.~W.}
\newblock \emph{\bibinfo{title}{{Quantum detection and estimation theory}}}
  (\bibinfo{publisher}{Academic}, \bibinfo{address}{New York},
  \bibinfo{year}{1976}).

\bibitem{Born2013}
\bibinfo{author}{Born, M.} \& \bibinfo{author}{Wolf, E.}
\newblock \emph{\bibinfo{title}{{Principles of optics: electromagnetic theory
  of propagation, interference and diffraction of light}}}
  (\bibinfo{publisher}{Elsevier}, \bibinfo{year}{2013}).

\bibitem{Braunstein1994}
\bibinfo{author}{Braunstein, S.~L.} \& \bibinfo{author}{Caves, C.~M.}
\newblock \bibinfo{title}{{Statistical distance and the geometry of quantum
  states}}.
\newblock \emph{\bibinfo{journal}{Physical Review Letters}}
  \textbf{\bibinfo{volume}{72}}, \bibinfo{pages}{3439--3443}
  (\bibinfo{year}{1994}).

\bibitem{Lee2002a}
\bibinfo{author}{Lee, H.}, \bibinfo{author}{Kok, P.} \&
  \bibinfo{author}{Dowling, J.~P.}
\newblock \bibinfo{title}{{A quantum Rosetta stone for interferometry}}.
\newblock \emph{\bibinfo{journal}{Journal of Modern Optics}}
  \textbf{\bibinfo{volume}{49}}, \bibinfo{pages}{2325--2338}
  (\bibinfo{year}{2002}).

\bibitem{Agarwal2001}
\bibinfo{author}{Agarwal, G.~S.}, \bibinfo{author}{Boyd, R.~W.},
  \bibinfo{author}{Nagasako, E.~M.} \& \bibinfo{author}{Bentley, S.~J.}
\newblock \bibinfo{title}{{Comment on “quantum interferometric optical
  lithography: exploiting entanglement to beat the diffraction limit”}}.
\newblock \emph{\bibinfo{journal}{Physical Review Letters}}
  \textbf{\bibinfo{volume}{86}}, \bibinfo{pages}{1389} (\bibinfo{year}{2001}).

\bibitem{Giovannetti2009}
\bibinfo{author}{Giovannetti, V.}, \bibinfo{author}{Lloyd, S.},
  \bibinfo{author}{MacCone, L.} \& \bibinfo{author}{Shapiro, J.~H.}
\newblock \bibinfo{title}{{Sub-Rayleigh-diffraction-bound quantum imaging}}.
\newblock \emph{\bibinfo{journal}{Physical Review A}}
  \textbf{\bibinfo{volume}{79}}, \bibinfo{pages}{013827}
  (\bibinfo{year}{2009}).

\bibitem{Achilles2003}
\bibinfo{author}{Achilles, D.}, \bibinfo{author}{Silberhorn, C.},
  \bibinfo{author}{Sliwa, C.}, \bibinfo{author}{Banaszek, K.} \&
  \bibinfo{author}{Walmsley, I.~A.}
\newblock \bibinfo{title}{{Fiber-assisted detection with photon number
  resolution.}}
\newblock \emph{\bibinfo{journal}{Optics letters}}
  \textbf{\bibinfo{volume}{28}}, \bibinfo{pages}{2387--2389}
  (\bibinfo{year}{2003}).

\bibitem{Divochiy2008}
\bibinfo{author}{Divochiy, A.} \& \bibinfo{author}{al, E.}
\newblock \bibinfo{title}{{Superconducting nanowire photon number resolving
  detector at telecom wavelength}}.
\newblock \emph{\bibinfo{journal}{Nature Photonics}}
  \textbf{\bibinfo{volume}{2}}, \bibinfo{pages}{302} (\bibinfo{year}{2008}).

\bibitem{Taylor2016}
\bibinfo{author}{Taylor, M.~A.} \& \bibinfo{author}{Bowen, W.~P.}
\newblock \bibinfo{title}{{Quantum metrology and its application in biology}}.
\newblock \emph{\bibinfo{journal}{Physics Reports}}
  \textbf{\bibinfo{volume}{615}}, \bibinfo{pages}{1--59}
  (\bibinfo{year}{2016}).

\bibitem{Bollinger1996}
\bibinfo{author}{Bollinger, J.~J.}, \bibinfo{author}{Itano, W.~M.},
  \bibinfo{author}{Wineland, D.~J.} \& \bibinfo{author}{Heinzen, D.~J.}
\newblock \bibinfo{title}{{Optimal frequency measurements with maximally
  correlated states}}.
\newblock \emph{\bibinfo{journal}{Physical Review A}}
  \textbf{\bibinfo{volume}{54}}, \bibinfo{pages}{R4649--R4652}
  (\bibinfo{year}{1996}).

\bibitem{Campos2003}
\bibinfo{author}{Campos, R.~A.}, \bibinfo{author}{Gerry, C.~C.} \&
  \bibinfo{author}{Benmoussa, A.}
\newblock \bibinfo{title}{{Optical interferometry at the Heisenberg limit with
  twin Fock states and parity measurements}}.
\newblock \emph{\bibinfo{journal}{Physical Review A}}
  \textbf{\bibinfo{volume}{68}}, \bibinfo{pages}{023810}
  (\bibinfo{year}{2003}).

\bibitem{Dowling1998}
\bibinfo{author}{Dowling, J.~P.}
\newblock \bibinfo{title}{{Correlated input-port, matter-wave interferometer:
  quantum-noise limits to the atom-laser gyroscope}}.
\newblock \emph{\bibinfo{journal}{Physical Review A}}
  \textbf{\bibinfo{volume}{57}}, \bibinfo{pages}{4736--4746}
  (\bibinfo{year}{1998}).

\bibitem{Cramer2016}
\bibinfo{author}{Cram{\'{e}}r, H.}
\newblock \emph{\bibinfo{title}{{Mathematical methods of statistics (PMS-9)}}}
  (\bibinfo{publisher}{Princeton university press}, \bibinfo{year}{2016}).

\bibitem{Braunstein1996}
\bibinfo{author}{Braunstein, S.~L.}, \bibinfo{author}{Caves, C.~M.} \&
  \bibinfo{author}{Milburn, G.~J.}
\newblock \bibinfo{title}{{Generalized uncertainty relations: Theory, examples,
  and Lorentz invariance}}.
\newblock \emph{\bibinfo{journal}{Annals of Physics}}
  \textbf{\bibinfo{volume}{247}}, \bibinfo{pages}{135--173}
  (\bibinfo{year}{1995}).

\bibitem{Pezze2017}
\bibinfo{author}{Pezz{\`{e}}, L.} \emph{et~al.}
\newblock \bibinfo{title}{{Optimal Measurements for Simultaneous Quantum
  Estimation of Multiple Phases}}.
\newblock \emph{\bibinfo{journal}{Physical Review Letters}}
  \textbf{\bibinfo{volume}{119}}, \bibinfo{pages}{130504}
  (\bibinfo{year}{2017}).

\bibitem{Baumgratz2016}
\bibinfo{author}{Baumgratz, T.} \& \bibinfo{author}{Datta, A.}
\newblock \bibinfo{title}{{Quantum enhanced estimation of a multidimensional
  field}}.
\newblock \emph{\bibinfo{journal}{Physical Review Letters}}
  \textbf{\bibinfo{volume}{116}}, \bibinfo{pages}{030801}
  (\bibinfo{year}{2016}).

\bibitem{Kok2017}
\bibinfo{author}{Kok, P.}, \bibinfo{author}{Dunningham, J.} \&
  \bibinfo{author}{Ralph, J.~F.}
\newblock \bibinfo{title}{{Role of entanglement in calibrating optical quantum
  gyroscopes}}.
\newblock \emph{\bibinfo{journal}{Physical Review A}}
  \textbf{\bibinfo{volume}{95}}, \bibinfo{pages}{012326}
  (\bibinfo{year}{2017}).

\bibitem{Jarzyna2012}
\bibinfo{author}{Jarzyna, M.} \& \bibinfo{author}{Demkowicz-Dobrza{\'{n}}ski,
  R.}
\newblock \bibinfo{title}{{Quantum interferometry with and without an external
  phase reference}}.
\newblock \emph{\bibinfo{journal}{Physical Review A}}
  \textbf{\bibinfo{volume}{85}}, \bibinfo{pages}{011801}
  (\bibinfo{year}{2012}).

\bibitem{Paris2009}
\bibinfo{author}{Paris, M. G.~A.}
\newblock \bibinfo{title}{{Quantum estimation for quantum technology}}.
\newblock \emph{\bibinfo{journal}{International Journal of Quantum
  Information}} \textbf{\bibinfo{volume}{7}}, \bibinfo{pages}{125--137}
  (\bibinfo{year}{2009}).

\bibitem{Matsumoto2002}
\bibinfo{author}{Matsumoto, K.}
\newblock \bibinfo{title}{{A new approach to the Cram{\'{e}}r–Rao-type bound
  of the pure-state model}}.
\newblock \emph{\bibinfo{journal}{Journal of Physics A: Mathematical and
  Theoretical}} \textbf{\bibinfo{volume}{35}}, \bibinfo{pages}{3111}
  (\bibinfo{year}{2002}).

\bibitem{Agarwal2013}
\bibinfo{author}{Agarwal, G.~S.}
\newblock \emph{\bibinfo{title}{{Quantum Optics}}}
  (\bibinfo{publisher}{Cambridge University Press}, \bibinfo{year}{2013}).

\bibitem{Knott2016a}
\bibinfo{author}{Knott, P.~A.}, \bibinfo{author}{Proctor, T.~J.},
  \bibinfo{author}{Hayes, A.~J.}, \bibinfo{author}{Cooling, J.~P.} \&
  \bibinfo{author}{Dunningham, J.~A.}
\newblock \bibinfo{title}{{Practical quantum metrology with large precision
  gains in the low-photon-number regime}}.
\newblock \emph{\bibinfo{journal}{Physical Review A}}
  \textbf{\bibinfo{volume}{93}}, \bibinfo{pages}{033859}
  (\bibinfo{year}{2016}).

\bibitem{Lee2016}
\bibinfo{author}{Lee, S.-y.}, \bibinfo{author}{Lee, C.-w.},
  \bibinfo{author}{Lee, J.} \& \bibinfo{author}{Nha, H.}
\newblock \bibinfo{title}{{Quantum phase estimation using path-symmetric
  entangled states}}.
\newblock \emph{\bibinfo{journal}{Scientiific Reports}}
  \textbf{\bibinfo{volume}{6}}, \bibinfo{pages}{30306} (\bibinfo{year}{2016}).

\bibitem{Birrittella2012}
\bibinfo{author}{Birrittella, R.}, \bibinfo{author}{Mimih, J.} \&
  \bibinfo{author}{Gerry, C.~C.}
\newblock \bibinfo{title}{{Multiphoton quantum interference at a beam splitter
  and the approach to Heisenberg-limited interferometry}}.
\newblock \emph{\bibinfo{journal}{Physical Review A}}
  \textbf{\bibinfo{volume}{86}}, \bibinfo{pages}{063828}
  (\bibinfo{year}{2012}).

\bibitem{Birrittella2014}
\bibinfo{author}{Birrittella, R.} \& \bibinfo{author}{Gerry, C.~C.}
\newblock \bibinfo{title}{{Quantum optical interferometry via the mixing of
  coherent and photon-subtracted squeezed vacuum states of light}}.
\newblock \emph{\bibinfo{journal}{Journal of the Optical Society of America B}}
  \textbf{\bibinfo{volume}{31}}, \bibinfo{pages}{586--593}
  (\bibinfo{year}{2014}).

\bibitem{Gong2017}
\bibinfo{author}{Gong, Q.~K.} \emph{et~al.}
\newblock \bibinfo{title}{{Intramode-correlation-enhanced phase sensitivities
  in an SU(1,1) interferometer}}.
\newblock \emph{\bibinfo{journal}{Physical Review A}}
  \textbf{\bibinfo{volume}{96}}, \bibinfo{pages}{033809}
  (\bibinfo{year}{2017}).

\bibitem{Sivakumar2015}
\bibinfo{author}{Sivakumar, S.}
\newblock \bibinfo{title}{{Superposed coherent states improve fidelity of NOON
  states generated in post-selection}}.
\newblock \emph{\bibinfo{journal}{Canadian Journal of Physics}}
  \textbf{\bibinfo{volume}{93}}, \bibinfo{pages}{373--376}
  (\bibinfo{year}{2015}).

\bibitem{Zhang2017a}
\bibinfo{author}{Zhang, L.} \& \bibinfo{author}{Chan, K. W.~C.}
\newblock \bibinfo{title}{{Scalable generation of multi-mode NOON states for
  quantum multiple-phase estimation}}.
\newblock \emph{\bibinfo{journal}{arXiv}} \bibinfo{pages}{1712.00128}
  (\bibinfo{year}{2017}).

\bibitem{Zhang2017FiO}
\bibinfo{author}{Zhang, L.} \& \bibinfo{author}{Chan, K. W.~C.}
\newblock \bibinfo{title}{{Generation of multi-mode NOON states with three
  photons using linear optics}}.
\newblock In \emph{\bibinfo{booktitle}{Frontiers in Optics/Laser Science
  (FiO/LS)}}, \bibinfo{pages}{Paper JW4A.22} (\bibinfo{address}{Washington
  D.C.}, \bibinfo{year}{2017}).

\bibitem{Zhang2018QCMC}
\bibinfo{author}{Zhang, L.} \& \bibinfo{author}{Chan, K. W.~C.}
\newblock \bibinfo{title}{{Generation of multi-mode high-NOON states}}.
\newblock In \emph{\bibinfo{booktitle}{Quantum Communication, Measurement and
  Computing (QCMC)}} (\bibinfo{address}{Baton Rouge, LA},
  \bibinfo{year}{2018}).

\bibitem{Zhang2018}
\bibinfo{author}{Zhang, L.} \& \bibinfo{author}{Chan, K. W.~C.}
\newblock \bibinfo{title}{{Universal multi-mode NOON state generation using
  nondeterministic-photon-number inputs and post-selection}}
  (\bibinfo{address}{in preparation}, \bibinfo{year}{2018}).

\bibitem{Vahlbruch2016}
\bibinfo{author}{Vahlbruch, H.}, \bibinfo{author}{Mehmet, M.},
  \bibinfo{author}{Danzmann, K.} \& \bibinfo{author}{Schnabel, R.}
\newblock \bibinfo{title}{{Detection of 15 dB squeezed states of light and
  their application for the absolute calibration of photoelectric quantum
  efficiency}}.
\newblock \emph{\bibinfo{journal}{Physical Review Letters}}
  \textbf{\bibinfo{volume}{117}}, \bibinfo{pages}{110801}
  (\bibinfo{year}{2016}).

\bibitem{Ono2010}
\bibinfo{author}{Ono, T.} \& \bibinfo{author}{Hofmann, H.~F.}
\newblock \bibinfo{title}{{Effects of photon losses on phase estimation near
  the Heisenberg limit using coherent light and squeezed vacuum}}.
\newblock \emph{\bibinfo{journal}{Physical Review A}}
  \textbf{\bibinfo{volume}{81}}, \bibinfo{pages}{033819}
  (\bibinfo{year}{2010}).

\bibitem{Reimer2012}
\bibinfo{author}{Reimer, M.~E.} \emph{et~al.}
\newblock \bibinfo{title}{{Bright single-photon sources in bottom-up tailored
  nanowires}}.
\newblock \emph{\bibinfo{journal}{Nature Communications}}
  \textbf{\bibinfo{volume}{3}}, \bibinfo{pages}{737} (\bibinfo{year}{2012}).

\bibitem{Wei2014}
\bibinfo{author}{Wei, Y.~J.} \emph{et~al.}
\newblock \bibinfo{title}{{Deterministic and robust generation of single
  photons from a single quantum dot with 99.5{\%} indistinguishability using
  adiabatic rapid passage}}.
\newblock \emph{\bibinfo{journal}{Nano Letters}} \textbf{\bibinfo{volume}{14}},
  \bibinfo{pages}{6515--6519} (\bibinfo{year}{2014}).

\bibitem{Kuhlmann2015}
\bibinfo{author}{Kuhlmann, A.~V.} \emph{et~al.}
\newblock \bibinfo{title}{{Transform-limited single photons from a single
  quantum dot}}.
\newblock \emph{\bibinfo{journal}{Nature Communications}}
  \textbf{\bibinfo{volume}{6}}, \bibinfo{pages}{8204} (\bibinfo{year}{2015}).

\bibitem{Somaschi2016}
\bibinfo{author}{Somaschi, N.} \emph{et~al.}
\newblock \bibinfo{title}{{Near-optimal single-photon sources in the solid
  state}}.
\newblock \emph{\bibinfo{journal}{Nature Photonics}}
  \textbf{\bibinfo{volume}{10}}, \bibinfo{pages}{340--345}
  (\bibinfo{year}{2016}).

\bibitem{Ding2016}
\bibinfo{author}{Ding, X.} \emph{et~al.}
\newblock \bibinfo{title}{{On-Demand single photons with high extraction
  efficiency and near-unity indistinguishability from a resonantly driven
  quantum dot in a micropillar}}.
\newblock \emph{\bibinfo{journal}{Physical Review Letters}}
  \textbf{\bibinfo{volume}{116}}, \bibinfo{pages}{020401}
  (\bibinfo{year}{2016}).

\bibitem{Wang2016}
\bibinfo{author}{Wang, H.} \emph{et~al.}
\newblock \bibinfo{title}{{Near-transform-limited single photons from an
  efficient solid-state quantum emitter}}.
\newblock \emph{\bibinfo{journal}{Physical Review Letters}}
  \textbf{\bibinfo{volume}{116}}, \bibinfo{pages}{213601}
  (\bibinfo{year}{2016}).

\bibitem{Wang2017}
\bibinfo{author}{Wang, H.} \emph{et~al.}
\newblock \bibinfo{title}{{High-efficiency multiphoton boson sampling}}.
\newblock \emph{\bibinfo{journal}{Nature Photonics}}
  \textbf{\bibinfo{volume}{11}}, \bibinfo{pages}{361--365}
  (\bibinfo{year}{2017}).

\bibitem{Kaneda2018}
\bibinfo{author}{Kaneda, F.} \& \bibinfo{author}{Kwiat, P.~G.}
\newblock \bibinfo{title}{{High-efficiency single-photon generation via
  large-scale active time multiplexing}}.
\newblock \emph{\bibinfo{journal}{arXiv}} \bibinfo{pages}{1803.04803}
  (\bibinfo{year}{2018}).

\bibitem{Lita2008}
\bibinfo{author}{Lita, A.~E.}, \bibinfo{author}{Miller, A.~J.} \&
  \bibinfo{author}{Nam, S.~W.}
\newblock \bibinfo{title}{{Counting near-infrared single-photons with 95{\%}
  efficiency}}.
\newblock \emph{\bibinfo{journal}{Optics Express}}
  \textbf{\bibinfo{volume}{16}}, \bibinfo{pages}{3032--3040}
  (\bibinfo{year}{2008}).

\bibitem{Calkins2013}
\bibinfo{author}{Calkins, B.} \emph{et~al.}
\newblock \bibinfo{title}{{High quantum-efficiency photon-number-resolving
  detector for photonic on-chip information processing}}.
\newblock \emph{\bibinfo{journal}{Optics Express}}
  \textbf{\bibinfo{volume}{21}}, \bibinfo{pages}{22657--22670}
  (\bibinfo{year}{2013}).

\bibitem{Zhang2016}
\bibinfo{author}{Zhang, L.}, \bibinfo{author}{Chan, K. W.~C.} \&
  \bibinfo{author}{Verma, P.~K.}
\newblock \bibinfo{title}{{Universal optimal estimation of the polarization of
  light with arbitrary photon statistics}}.
\newblock \emph{\bibinfo{journal}{Physical Review A}}
  \textbf{\bibinfo{volume}{93}}, \bibinfo{pages}{032137}
  (\bibinfo{year}{2016}).

\end{thebibliography}
