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Superradiant phase transition with graphene embedded in one dimensional optical cavity

Superradiant phase transition with graphene embedded in one dimensional optical cavity
Superradiant phase transition with graphene embedded in one dimensional optical cavity
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.
1096-3677
Li, Benliang
b38a09b8-9d5b-46cc-b5e5-0e81825882dc
Liu, Tao
01fc84ea-a1b9-4207-a11b-dc9b6fe27824
Hewak, Daniel
87c80070-c101-4f7a-914f-4cc3131e3db0
Wang, Qi Jie
69a270cc-666c-4d05-a188-b8a3a289b48b
Li, Benliang
b38a09b8-9d5b-46cc-b5e5-0e81825882dc
Liu, Tao
01fc84ea-a1b9-4207-a11b-dc9b6fe27824
Hewak, Daniel
87c80070-c101-4f7a-914f-4cc3131e3db0
Wang, Qi Jie
69a270cc-666c-4d05-a188-b8a3a289b48b

Li, Benliang, Liu, Tao, Hewak, Daniel and Wang, Qi Jie (2017) Superradiant phase transition with graphene embedded in one dimensional optical cavity. Superlattices and Microstructures. (doi:10.1016/j.spmi.2017.11.020).

Record type: Article

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.

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Superradiant phase transition with graphene embedded in 1D Cavity - Accepted Manuscript
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Accepted/In Press date: 13 November 2017
e-pub ahead of print date: 14 November 2017

Identifiers

Local EPrints ID: 417029
URI: http://eprints.soton.ac.uk/id/eprint/417029
ISSN: 1096-3677
PURE UUID: ef8f82e8-4256-4861-858e-18a814d9efa3
ORCID for Daniel Hewak: ORCID iD orcid.org/0000-0002-2093-5773

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Date deposited: 17 Jan 2018 17:30
Last modified: 07 Oct 2020 05:19

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