Theoretical proposals to measure resonator-induced modifications of the electronic ground-state in doped quantum wells
Theoretical proposals to measure resonator-induced modifications of the electronic ground-state in doped quantum wells
Recent interest in the physics of nonperturbative light-matter coupling led to the development of solid-state cavity quantum electrodynamics setups in which the interaction energies are comparable with the bare ones. In such a regime, the ground state of the coupled system becomes interaction-dependent and is predicted to contain a population of virtual excitations, which, despite being the object of many investigations, remain unobserved. In this paper, we investigate how virtual electronic excitations in quantum wells modify the ground-state charge distribution, and we propose two methods to measure such a cavity-induced perturbation. The first approach is based on spectroscopic mapping of the electronic population at a specific location in the quantum well using localized defect states. The second approach exploits instead the photonic equivalent of a Kelvin probe to measure the average charge distribution across the quantum well. We find both effects observable with present-day or near-future technology. Our results thus provide a route toward a demonstration of cavity-induced modulation of ground-state electronic properties.
De Liberato, Simone
5942e45f-3115-4027-8653-a82667ed8473
Wang, Yuan
6e0aca42-6096-47c8-b11a-a8072348fac5
De Liberato, Simone
5942e45f-3115-4027-8653-a82667ed8473
Wang, Yuan
6e0aca42-6096-47c8-b11a-a8072348fac5
De Liberato, Simone and Wang, Yuan
(2021)
Theoretical proposals to measure resonator-induced modifications of the electronic ground-state in doped quantum wells.
Physical Review A, 104 (2), [023109].
(doi:10.1103/PhysRevA.104.023109).
Abstract
Recent interest in the physics of nonperturbative light-matter coupling led to the development of solid-state cavity quantum electrodynamics setups in which the interaction energies are comparable with the bare ones. In such a regime, the ground state of the coupled system becomes interaction-dependent and is predicted to contain a population of virtual excitations, which, despite being the object of many investigations, remain unobserved. In this paper, we investigate how virtual electronic excitations in quantum wells modify the ground-state charge distribution, and we propose two methods to measure such a cavity-induced perturbation. The first approach is based on spectroscopic mapping of the electronic population at a specific location in the quantum well using localized defect states. The second approach exploits instead the photonic equivalent of a Kelvin probe to measure the average charge distribution across the quantum well. We find both effects observable with present-day or near-future technology. Our results thus provide a route toward a demonstration of cavity-induced modulation of ground-state electronic properties.
Text
Electrostatic
- Accepted Manuscript
More information
Accepted/In Press date: 11 August 2021
e-pub ahead of print date: 24 August 2021
Identifiers
Local EPrints ID: 450938
URI: http://eprints.soton.ac.uk/id/eprint/450938
ISSN: 1050-2947
PURE UUID: af068376-057d-4338-862f-f71ac4e7f8e6
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Date deposited: 24 Aug 2021 17:03
Last modified: 17 Mar 2024 03:31
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