Generating Even-Photon State via Resonant Interaction Between Ladder-Type Three-Level Atoms with a Single-Mode Field

一个计划被介绍基于在梯子类型之间的反响的相互作用产生平光子的状态有一块单个模式的地的三水平的原子。在计划，合适准备的梯子类型的一个序列三水平的原子是有序的通过一个单个模式的洞送了开始。处于扎根的状态的所有原子的察觉折叠洞到需要的状态。计划与洞基于原子的反响的相互作用，并且因此，要求的相互作用时间能极大地被弄短。鉴于 decoherence，这是重要的。

A scheme is presented to generate even-photon state based on resonant interaction between ladder-type three-level atoms with a single-mode field. In the scheme, a sequence of suitably prepared ladder-type three-level atoms are orderly sent through a single-mode cavity initiaJly in vacuum state. The detection of a J1 the atoms in the ground states collapses the cavity to the desired state. The scheme is based on the resonant interaction of atoms with the cavity, and thus the required interaction time can be greatly shortened. This is important in view of decoherence.