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Multielectron ground state electroluminescence

Multielectron ground state electroluminescence
Multielectron ground state electroluminescence

The ground state of a cavity-electron system in the ultrastrong coupling regime is characterized by the presence of virtual photons. If an electric current flows through this system, the modulation of the light-matter coupling induced by this nonequilibrium effect can induce an extracavity photon emission signal, even when electrons entering the cavity do not have enough energy to populate the excited states. We show that this ground state electroluminescence, previously identified in a single-qubit system [Phys. Rev. Lett. 116, 113601 (2016)PRLTAO0031-900710.1103/PhysRevLett.116.113601] can arise in a many-electron system. The collective enhancement of the light-matter coupling makes this effect, described beyond the rotating wave approximation, robust in the thermodynamic limit, allowing its observation in a broad range of physical systems, from a semiconductor heterostructure with flatband dispersion to various implementations of the Dicke model.

0031-9007
Cirio, Mauro
cc53d4b3-190e-48a2-a65a-020e40865d90
Shammah, Nathan
cefd9591-cc9b-4d59-abf4-1b1f62fc4300
Lambert, Neill
93e3eff9-c570-4e64-ba5d-b84ad715d000
De Liberato, Simone
5942e45f-3115-4027-8653-a82667ed8473
Nori, Franco
a90190de-06f0-4686-9fa6-c4ba705ad014
Cirio, Mauro
cc53d4b3-190e-48a2-a65a-020e40865d90
Shammah, Nathan
cefd9591-cc9b-4d59-abf4-1b1f62fc4300
Lambert, Neill
93e3eff9-c570-4e64-ba5d-b84ad715d000
De Liberato, Simone
5942e45f-3115-4027-8653-a82667ed8473
Nori, Franco
a90190de-06f0-4686-9fa6-c4ba705ad014

Cirio, Mauro, Shammah, Nathan, Lambert, Neill, De Liberato, Simone and Nori, Franco (2019) Multielectron ground state electroluminescence. Physical Review Letters, 122 (19), [190403]. (doi:10.1103/PhysRevLett.122.190403).

Record type: Article

Abstract

The ground state of a cavity-electron system in the ultrastrong coupling regime is characterized by the presence of virtual photons. If an electric current flows through this system, the modulation of the light-matter coupling induced by this nonequilibrium effect can induce an extracavity photon emission signal, even when electrons entering the cavity do not have enough energy to populate the excited states. We show that this ground state electroluminescence, previously identified in a single-qubit system [Phys. Rev. Lett. 116, 113601 (2016)PRLTAO0031-900710.1103/PhysRevLett.116.113601] can arise in a many-electron system. The collective enhancement of the light-matter coupling makes this effect, described beyond the rotating wave approximation, robust in the thermodynamic limit, allowing its observation in a broad range of physical systems, from a semiconductor heterostructure with flatband dispersion to various implementations of the Dicke model.

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Multielectron Ground State Electroluminescence - Accepted Manuscript
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e-pub ahead of print date: 15 May 2019
Published date: 17 May 2019

Identifiers

Local EPrints ID: 431668
URI: http://eprints.soton.ac.uk/id/eprint/431668
ISSN: 0031-9007
PURE UUID: 35f669d3-81bf-489f-8dd6-33f865d3c8d3
ORCID for Simone De Liberato: ORCID iD orcid.org/0000-0002-4851-2633

Catalogue record

Date deposited: 12 Jun 2019 16:30
Last modified: 07 Oct 2020 02:03

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