Generating photon-added states without adding a photon
Generating photon-added states without adding a photon
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DOI：
10.1103/physreva.100.043802
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发表时间：
2019-08
影响因子：
2.9
通讯作者：
S. U. Shringarpure;J. Franson
中科院分区：
文献类型：
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作者：
S. U. Shringarpure;J. Franson
我们表明，一个连续的范围内的非经典状态的光可以产生使用的光参量放大器的空闲模式的条件测量。通过在放大器的信号模式中引入相干态来制备输出状态，其中在空闲模式中具有单光子，随后在输出空闲模式中对单光子进行有条件测量。通过改变放大器的增益，这种方法可以产生相干态，光子添加态，位移数态，或具有中间性质的其他非经典态的连续范围。我们注意到，这种方法可以产生一个光子添加状态，即使后选择放大器不添加任何光子的信号或空闲模式。产生连续范围的非经典态的能力可能在量子信息处理中有实际应用。
We show that a continuous range of nonclassical states of light can be generated using conditional measurements on the idler mode of an optical parametric amplifier. The output state is prepared by introducing a coherent state in the signal mode of the amplifier with a single photon in the idler mode, followed by a conditional measurement of a single photon in the output idler mode. By varying the gain of the amplifier, this approach can produce a coherent state, a photon-added state, a displaced number state, or a continuous range of other nonclassical states with intermediate properties. We note that this approach can generate a photon-added state even though the post-selected amplifier does not add any photons to the signal or idler modes. The ability to generate a continuous range of nonclassical states may have practical applications in quantum information processing.