The exact solution of time behaviour of the two-level atom interacted with two-photon field is obtained.

本文研究在双光子场作用下二能级原子时间行为的精确解。

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So the quantum statistical property of single-photon field in EIT can be optimized in different conditions when appropriate parameters are chosen.

由此可见选取合适的参量可优化电磁感应透明过程中单光子场的量子统计特性。

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Thus, anything inside the event horizon, including a photon, is prevented from escaping across the event horizon by the extremely strong gravitational field.

因此，活动视界里任何东西，包括一个光子，靠非常强的引力场被避免从活动视界里逃逸出来。

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Normally, the spin of each photon would rotate by a certain amount, thanks to its interactions with the magnetic field of the atoms.

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