Multiphoton state engineering by heralded interference between single photons and coherent states
Multiphoton state engineering by heralded interference between single photons and coherent states
复制标题
通过预示单光子和相干态之间的干涉进行多光子态工程
DOI：
10.1103/physreva.86.043820
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发表时间：
2012-10-15
影响因子：
2.9
通讯作者：
Walmsley, Ian A.
中科院分区：
文献类型：
--
作者：
Bartley, Tim J.;Donati, Gaia;Walmsley, Ian A.
我们发展了一种利用量子催化通过相干态和Fock态之间的干涉产生多光子非经典态的技术。通过调制相干场强度，催化剂光子的数量，以及它们干涉的分束器的比率，可以产生各种各样的非经典现象，包括高达1.25 dB的压缩，反聚束和超聚束光子统计，以及对位移相干叠加态表现出90%以上保真度的状态。我们进行量子催化实验，显示到非经典制度的可调性。我们的协议是不受限制的弱非线性，最已知的战略准备多光子非经典状态的基础。该协议的连续迭代可以直接控制Fock基中高阶项的权重，为量子计算、通信和计量学中应用的“设计者”多光子态的有条件制备铺平了道路。
We develop a technique for generating multiphoton nonclassical states via interference between coherent and Fock states using quantum catalysis. By modulating the coherent field strength, the number of catalyst photons, and the ratio of the beam splitter upon which they interfere, a wide range of nonclassical phenomena can be created, including squeezing of up to 1.25 dB, antibunched and superbunched photon statistics, and states exhibiting over 90% fidelity to displaced coherent superposition states. We perform quantum catalysis experimentally, showing tunability into the nonclassical regime. Our protocol is not limited by weak nonlinearities that underlie most known strategies of preparing multiphoton nonclassical states. Successive iterations of this protocol can lead to direct control over the weights of higher-order terms in the Fock basis, paving the way towards conditional preparation of "designer" multiphoton states for applications in quantum computation, communication, and metrology.