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Light-matter decoupling in the deep strong coupling regime: the breakdown of the Purcell Effect

Light-matter decoupling in the deep strong coupling regime: the breakdown of the Purcell Effect
Light-matter decoupling in the deep strong coupling regime: the breakdown of the Purcell Effect
Improvements in both the photonic confinement and the emitter design have led to a steady increase in the strength of the light-matter coupling in cavity quantum electrodynamics experiments. This has allowed us to access interaction-dominated regimes in which the state of the system can only be described in terms of mixed light-matter excitations. Here we show that, when the coupling between light and matter becomes strong enough, this picture breaks down, and light and matter degrees of freedom totally decouple. A striking consequence of such a counterintuitive phenomenon is that the Purcell effect is reversed and the spontaneous emission rate, usually thought to increase with the light-matter coupling strength, plummets instead for large enough couplings.
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De Liberato, Simone
5942e45f-3115-4027-8653-a82667ed8473
De Liberato, Simone
5942e45f-3115-4027-8653-a82667ed8473

De Liberato, Simone (2014) Light-matter decoupling in the deep strong coupling regime: the breakdown of the Purcell Effect. Physical Review Letters, 112 (1), 1-5, [16401]. (doi:10.1103/PhysRevLett.112.016401).

Record type: Article

Abstract

Improvements in both the photonic confinement and the emitter design have led to a steady increase in the strength of the light-matter coupling in cavity quantum electrodynamics experiments. This has allowed us to access interaction-dominated regimes in which the state of the system can only be described in terms of mixed light-matter excitations. Here we show that, when the coupling between light and matter becomes strong enough, this picture breaks down, and light and matter degrees of freedom totally decouple. A striking consequence of such a counterintuitive phenomenon is that the Purcell effect is reversed and the spontaneous emission rate, usually thought to increase with the light-matter coupling strength, plummets instead for large enough couplings.

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Accepted/In Press date: 1 December 2013
e-pub ahead of print date: 6 January 2014
Published date: 6 January 2014
Organisations: Quantum, Light & Matter Group

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Local EPrints ID: 401311
URI: http://eprints.soton.ac.uk/id/eprint/401311
PURE UUID: ed6b0a5f-053e-41e2-b37f-0697d8d8a7ce
ORCID for Simone De Liberato: ORCID iD orcid.org/0000-0002-4851-2633

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Date deposited: 11 Oct 2016 15:53
Last modified: 18 Feb 2021 17:21

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