Coherent-feedback-induced controllable optical bistability and photon blockade. (14th April 2015)

• Record Type: Journal Article
• Authors: Liu, Yu-Long; Liu, Zhong-Peng; Zhang, Jing
• Is Part Of: Journal of physics. Volume 48:Number 10(2015:May 15)
• Publication Date: 2015-04-14
• Subjects: coherent feedback -- photon blockade -- controllable optical bistability; 42.50.Ct -- 07.10.Cm -- 42.65.Pc -- 42.50.Ar; Atoms -- Periodicals; Molecules -- Periodicals; Optics -- Periodicals; Nuclear physics -- Periodicals; 539.6
• DOI: 10.1088/0953-4075/48/10/105501
• Languages: English
• ISSNs: 0953-4075

Abstract

Abstract: It is well known that some nonlinear phenomena such as strong photon blockade are difficult to observe in optomechanical systems with current experimental technology. Here we present a coherent feedback control strategy in which a linear cavity is coherently controlled by an optomechanical controller in a feedback manner. The coherent feedback loop transfers quantum nonlinearity from the controller to the controlled cavity causing destructive quantum interference to occur, and making it possible to observe strong nonlinear effects. With the help of the coherent feedback loop, large and tunable bistability and strong photon blockade of the cavity modes can be achieved even in the optomechanical weak coupling regime. Additionally, the coherent feedback loop leads to two-photon and multiphoton tunnelings for the controlled linear cavity, which are also typical quantum nonlinear phenomena. We hope that our work can give new perspectives on engineering nonlinear interactions in quantum systems.