理学院数理讲坛（2017年第57讲）
报告题目：Squeezed and Entangled Quantum Nonlinear Schrodinger Solitons
报告人：李瑞光（Ray-Kuang Lee）教授
单 位：台湾清华大学
时间：2017年12月26日（星期二）10:00-11:00
地点：阳明学院楼（包玉书九号楼）303
摘要：
The quantum nonlinear Schrodinger equation (QNLSE) has been widely used as a model equation for studying the quantum effects of bosonic solitons. In particular, the possibility of squeezing generation through quantum solitons was predicted by theoretical works in 1987 and subsequently confirmed by fiber soliton experiments in 1991. Here, considered as a multipartite quantum system, time-multiplexed nonlinear Schrodinger solitons after collision are rigorously proved to become quantum entangled in the sense that their quadrature components of suitably selected internal modes satisfy the inseparability criterion [1]. We also reveal the quantum correlations and quantum noise in soliton collisions [2], and fiber-Bragg-grating solitons [3]. Moreover, we propose to utilize the effect of coherent population trapping (CPT) to directly generate squeezed light without any optical cavity, as a new avenue in the generation of squeezed light for quantum interface [4].
References:
[1] Yinchieh Lai and Ray-Kuang Lee, “Entangled Quantum Nonlinear Schro ̈dinger Solitons,” Phys. Rev. Lett. 103, 013902(2009).
[2] Ray-Kuang Lee, Yinchieh Lai, and Yuri S. Kivshar, “Quantum correlations in soliton collisions,” Phys. Rev. A 71, 035801(2005).
[3] Ray-Kuang Lee and Yinchieh Lai, “Amplitude-squeezed fiber-Bragg-grating solitons,” Phys. Rev. A 69, 021801(R)(2004).
[4] You-Lin Chuang, Ray-Kuang Lee, and Ite A. Yu, “Optical-density-enhanced squeezed-light generation without optical cavities,” Phys. Rev. A 96, 053818 (2017).