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Photon echoes for a system of large negative spin and few photons

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Abstract

Persistent photon echoes (revivals) are seen for a large number (N) of two-level molecules (TLMs) prepared initially in the all-down state interacting in a lossless cavity with a photon distribution with a small mean photon number. This case has not been addressed previously revealing characteristic times proportional to the square root of N. Unexpectedly, this behavior is independent of the initial photon distribution (including thermal) and long after the initial echoes die out, they re-emerge completely. Entropy, disentanglement and the Q function are considered with complete disentanglement only occurring at the revival times. Comparison is made to established results.

© 2017 Optical Society of America

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