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Title: Superradiant phase transition with graphene embedded in one dimensional optical cavity
Authors: Li, Benliang
Liu, Tao
Hewak, Daniel W.
Wang, Qi Jie
Keywords: Engineering::Electrical and electronic engineering
Superradiant Phase Transition
Issue Date: 2017
Source: Li, B., Liu, T., Hewak, D. W., & Wang, Q. J. (2018). Superradiant phase transition with graphene embedded in one dimensional optical cavity. Superlattices and Microstructures, 113, 401-408. doi:10.1016/j.spmi.2017.11.020
Series/Report no.: Superlattices and Microstructures
Abstract: We theoretically investigate the cavity QED of graphene embedded in an optical cavity under perpendicular magnetic field. We consider the coupling of cyclotron transition and a multimode cavity described by a multimode Dicke model. This model exhibits a superradiant quantum phase transition, which we describe exactly in an effective Hamiltonian approach. The complete excitation spectrum in both the normal phase and superradiant phase regimes is given. In contrast to the single mode case, multimode coupling of cavity photon and cyclotron transition can greatly reduce the critical vacuum Rabi frequency required for quantum phase transition, and dramatically enhance the superradiant emission by fast modulating the Hamiltonian. Our work paves a way to experimental explorations of quantum phase transitions in solid state systems.
ISSN: 0749-6036
DOI: 10.1016/j.spmi.2017.11.020
Schools: School of Electrical and Electronic Engineering 
School of Physical and Mathematical Sciences 
Organisations: The Photonics Institute
Centre for OptoElectronics and Biophotonics
Centre for Disruptive Photonic Technologies
Rights: © 2017 Elsevier Ltd. All rights reserved. This paper was published in Superlattices and Microstructures and is made available with permission of Elsevier Ltd.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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