共振隧穿非对称量子阱中强相互作用高纠缠光子
Strongly interacting and highly entangled photons in asymmetric quantum well with resonant tunneling
摘要：
我们提出了一种非对称量子阱结构来实现两个慢光脉冲之间的强相互作用。分析了其线性光学特性和与交叉克尔非线性相关的非线性光学响应。结合共振隧穿效应和倒Y型方案的优点，可以实现巨大的交叉克尔非线性效应。基于这种独特的特性，我们证明了可以产生高度纠缠的光子，并可以构造光子控制的相位门。在这种结构中，该方案对于探测脉冲和信号脉冲是对称的。因此，群速度匹配的条件可以通过调整初始电子分布来满足。
英文摘要：
We propose an asymmetric quantum well structure to realize strong interaction between two slow optical pulses. The linear optical properties and nonlinear optical responses associated with cross-Kerr nonlinearity are analyzed. Combining the resonant tunneling and the advantages of inverted-Y type scheme, giant cross-Kerr nonlinearity can be achieved with vanishing absorptions. Based on the unique feature, we demonstrate that highly entangled photons can be produced and photonic controlled phase gate can be constructed. In this construction, the scheme is symmetric for the probe and signal pulses. Consequently, the condition of group velocity matching can be fulfilled by adjusting the initial electron distribution.
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