绝热通过动态产生最大纠缠光子多重态
Dynamic generation of maximally entangled photon multiplets by adiabatic passage
摘要：
将原子塞曼相干映射到光腔中光子态的量子态合成的绝热通过方案推广到两个简并正交偏振腔模的一般情况。系统动力学的缀饰态结构和Monte Carlo波函数模拟的分析计算表明，对于适当选择的腔失谐，有可能产生光子多重态的偏振纠缠最大化。这些状态显示出Greenberger、Horne和Zeilinger（GHZ）描述的非经典相关性。提出了一种利用腔体逃逸光子的符合探测实现GHZ测量的实验方案。的相关性被发现起源于绝热通道的动力学和持续，即使腔衰减和GHZ状态合成竞争在同一时间尺度上。除了纠缠场态之外，还可以通过使用不同的原子跃迁和初始塞曼态来产生光子与原子之间的纠缠。
英文摘要：
The adiabatic passage scheme for quantum state synthesis, in which atomic Zeeman coherences are mapped to photon states in an optical cavity, is extended to the general case of two degenerate cavity modes with orthogonal polarization. Analytical calculations of the dressed-state structure and Monte Carlo wave-function simulations of the system dynamics show that, for a suitably chosen cavity detuning, it is possible to generate states of photon multiplets that are maximally entangled in polarization. These states display nonclassical correlations of the type described by Greenberger, Horne, and Zeilinger (GHZ). An experimental scheme to realize a GHZ measurement using coincidence detection of the photons escaping from the cavity is proposed. The correlations are found to originate in the dynamics of the adiabatic passage and persist even if cavity decay and GHZ state synthesis compete on the same time scale. Beyond entangled field states, it is also possible to generate entanglement between photons and the atom by using a different atomic transition and initial Zeeman state.
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