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Langevin analysis of fundamental noise limits in coherent anti-Stokes Raman spectroscopy
(American Physical Society, 2005-01-04)
We use a Langevin approach to analyze the quantum noise in coherent anti-Stokes Raman spectroscopy in several experimental scenarios: with continuous-wave input fields acting simultaneously and with fast sequential pulsed ...
Generation of a superposition of multiple mesoscopic states of radiation in a resonant cavity
(American Physical Society, 2005-04-27)
Using resonant interaction between atoms and the field in a high quality cavity, we show how to generate a superposition of many mesoscopic states of the field. We study the quasi-probability distributions and demonstrate ...
Inseparability inequalities for higher order moments for bipartite systems
(IOP Publishing, 2005-10-07)
There are several examples of bipartite entangled states of continuous variables for which the existing criteria for entanglement using the inequalities involving the second-order moments are insufficient. We derive new ...
Implementing Deutsch-Jozsa algorithm using light shifts and atomic ensembles
(American Physical Society, 2005-01-27)
We present an optical scheme to implement the Deutsch-Jozsa algorithm using ac Stark shifts. The scheme uses an atomic ensemble consisting of four-level atoms interacting dispersively with a field. This leads to a Hamiltonian ...
Vacuum-induced Stark shifts for quantum logic using a collective system in a high-quality dispersive cavity
(American Physical Society, 2005-05-13)
A collective system of atoms in a high-quality cavity can be described by a nonlinear interaction which arises due to the Lamb shift of the energy levels due to the cavity vacuum [Agarwal et al., Phys. Rev. A 56, 2249 ...
Quantum random walk of the field in an externally driven cavity
(American Physical Society, 2005-09-16)
Using a resonant interaction between atoms and the field in a high-quality cavity, we show how to realize quantum random walks as proposed by Aharonov et al. [Phys. Rev. A 48, 1687 (1993)]. The atoms are driven strongly ...