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Ultraslow light in inhomogeneously broadened media
(American Physical Society, 2006-04-19)
We calculate the characteristics of ultraslow light in an inhomogeneously broadened medium. We present analytical and numerical results for the group delay as a function of power of the propagating pulse. We apply these ...
Subwavelength atom localization via coherent population trapping
(IOP Publishing, 2006-08-14)
We present an atom localization scheme based on coherent population trapping. We consider atomic transitions in a Lambda configuration where the control field is a standing-wave field. The probe field and the control field ...
Competition between electromagnetically induced transparency and Raman processes
(American Physical Society, 2006-10-05)
We present a theoretical formulation of the competition between electromagnetically induced transparency (EIT) and Raman processes. The latter become important when the medium can no longer be considered to be dilute. ...
Class of solitary wave solutions of the one-dimensional Gross-Pitaevskii equation
(American Physical Society, 2006-05-19)
We present a large family of exact solitary wave solutions of the one-dimensional Gross-Pitaevskii equation, with time-varying scattering length and gain or loss, in both expulsive and regular parabolic confinement regimes. ...
Towards the Heisenberg limit in magnetometry with parametric down-converted photons
(American Physical Society, 2006-11-16)
Recent theoretical and experimental papers have shown how one can achieve Heisenberg-limited measurements by using entangled photons. Here we show how the photons in a noncollinear down-conversion process can be used for ...
Two-photon excitation dynamics in bound two-body Coulomb systems including ac Stark shift and ionization
(American Physical Society, 2006-05-03)
One of the dominant systematic effects that shift resonance lines in high-precision measurements of twophoton transitions is the dynamic (ac) Stark shift. For suitable laser frequencies, the ac Stark shift acquires an ...
Entanglement by linear SU(2) transformations: Generation and evolution of quantum vortex states
(IOP Publishing, 2006-07-31)
We consider the evolution of a two-mode system of bosons under the action of a Hamiltonian that generates linear SU(2) transformations. The Hamiltonian is generic in that it represents a host of entanglement mechanisms, ...
Entangling pairs of nano-cantilevers, Cooper-pair boxes and mesoscopic teleportation
(IOP Publishing, 2006-03-07)
We propose two schemes to establish entanglement between two mesoscopic quantum systems through a third mesoscopic quantum system. The first scheme entangles two nano-mechanical oscillators in a non-Gaussian entangled state ...
Interferences in parametric interactions driven by quantized fields
(American Physical Society, 2006-07-11)
We report interferences in the quantum fluctuations of the output of a parametric amplifier when the cavity is driven by a quantized field at the signal frequency. The interferences depend on the phase fluctuations of the ...