Effects of Decoherence on the Nonlinear Optical Phase Shift Obtained from a One-Dimensional Atom
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概要
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We investigate the effects of decoherence on the nonlinear phase shift obtained from a one-dimensional atom implemented by a one-sided microcavity. The one-dimensional atom is realized by coupling a single atom confined in the cavity to the one-dimensional input-output fields of the cavity. The nonlinear optical response obtained from the one-dimensional atom can then be analyzed by using the optical Bloch equations. It is shown that the nonlinear phase shift depends on the coupling efficiency $\eta$, which is defined by the ratio of the coherent atom-field coupling rate and the total dipole relaxation rate. In particular, a maximal phase shift of $\pi$ is obtained on resonance for coupling efficiencies $\eta$ larger than one half, while the maximal phase shifts for coupling efficiencies $\eta$ smaller than one half are obtained off resonance and are always smaller than $\pi/2$.
- 2004-11-15
著者
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OKA Hisaki
Research Institute for Electronic Science, Hokkaido University
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HOFMANN Holger
PRESTO, Japan Science and Technology Agency (JST), Research Institute for Electronic Science, Hokkai
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Takeuchi Shigeki
Research Institute For Electronic Science Hokkaido University
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Sasaki Keiji
Research Institute For Electronic Science Hokkaido University
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Hofmann Holger
PRESTO, Japan Science and Technology Agency (JST), Research Institute for Electronic Science, Hokkaido University, Sapporo 060-0812, Japan
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Oka Hisaki
Research Institute for Electronic Science, Hokkaido University, Sapporo 060-0812, Japan
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