Efficient generation of maximally entangled states via four-wave mixing in a semiconductor quantum-dot nanostructure

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• 作者：ChunlingDing ; Xiangying Hao ; Jiahua Li ; Xiaoxue Yang
• 关键词：Maximally entangled state ; Four-wave mixing (FWM) ; Semiconductor quantum dot (SQD)
• 刊名：Physics Letters A
• 出版年：2010
• 出版时间：11 January 2010
• 年：2010
• 卷：374
• 期：4
• 页码：680-686
• 全文大小：690 K

文摘

We investigate the generation of the maximally entangled state of two weak-light pulses (the probe and generated pulses) via four-wave mixing (FWM) in a semiconductor quantum dot (SQD) with a biexciton–exciton cascade configuration. The results show that this maximally entangled state can propagate with an ultraslow group velocity under suitable parameter conditions. For application, our proposed scheme is probably achievable with the present technology by applying the standard GaAs/InGaAs self-assemble quantum dots (QDs). Furthermore, our calculations provide a guideline for the realization of the maximally entangled state in the SQD solid-state system, which can be much more practical than that in an atomic system because of its flexible design and the wide tunable parameters.