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Cavity QED in the ultrastrong coupling regime: photon bunching from the emission of individual dressed qubits

Cavity QED in the ultrastrong coupling regime: photon bunching from the emission of individual dressed qubits
Cavity QED in the ultrastrong coupling regime: photon bunching from the emission of individual dressed qubits
Photon antibunching in the light scattered by single quantum emitters is one of the hallmarks of quantum optics, providing an unequivocal demonstration of the quantized nature of the electromagnetic field. Antibunching can be intuitively understood by the need for a two-level system lying in its lower state after emitting a photon to be re-excited into the upper one before a second emission can take place. Here we show that such a picture breaks down in the ultrastrong light–matter coupling regime, when the coupling strength becomes comparable to the bare emitter frequency. Specializing to the cases of both a natural and an artificial atom, we thus show that a single emitter coupled to a photonic resonator can emit bunched light. The result presented herein is clear evidence of how the ultrastrong coupling regime is able to change the nature of individual atoms.
Cavity QED, Ultrastrong Coupling, Two-Photon Correlation Function
2345–2351
Garziano, Luigi
36552a5e-6c0a-4e55-b610-2f9cbf0cbd50
Ridolfo, Alessandro
a3aca3f7-49cc-43e7-bad7-c6b583f1939d
De Liberato, Simone
5942e45f-3115-4027-8653-a82667ed8473
Savasta, Salvatore
756b1638-adf8-48ce-9111-a9bf9dc95a24
Garziano, Luigi
36552a5e-6c0a-4e55-b610-2f9cbf0cbd50
Ridolfo, Alessandro
a3aca3f7-49cc-43e7-bad7-c6b583f1939d
De Liberato, Simone
5942e45f-3115-4027-8653-a82667ed8473
Savasta, Salvatore
756b1638-adf8-48ce-9111-a9bf9dc95a24

Garziano, Luigi, Ridolfo, Alessandro, De Liberato, Simone and Savasta, Salvatore (2017) Cavity QED in the ultrastrong coupling regime: photon bunching from the emission of individual dressed qubits. ACS Photonics, 4 (9), 2345–2351. (doi:10.1021/acsphotonics.7b00635).

Record type: Article

Abstract

Photon antibunching in the light scattered by single quantum emitters is one of the hallmarks of quantum optics, providing an unequivocal demonstration of the quantized nature of the electromagnetic field. Antibunching can be intuitively understood by the need for a two-level system lying in its lower state after emitting a photon to be re-excited into the upper one before a second emission can take place. Here we show that such a picture breaks down in the ultrastrong light–matter coupling regime, when the coupling strength becomes comparable to the bare emitter frequency. Specializing to the cases of both a natural and an artificial atom, we thus show that a single emitter coupled to a photonic resonator can emit bunched light. The result presented herein is clear evidence of how the ultrastrong coupling regime is able to change the nature of individual atoms.

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ACS Garziano accepted - Accepted Manuscript
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Accepted/In Press date: 24 August 2017
e-pub ahead of print date: 24 August 2017
Published date: 20 September 2017
Keywords: Cavity QED, Ultrastrong Coupling, Two-Photon Correlation Function

Identifiers

Local EPrints ID: 413623
URI: http://eprints.soton.ac.uk/id/eprint/413623
PURE UUID: d4be6071-c7f8-4dce-b926-1b8f53f628af
ORCID for Simone De Liberato: ORCID iD orcid.org/0000-0002-4851-2633

Catalogue record

Date deposited: 30 Aug 2017 16:31
Last modified: 07 Oct 2020 05:52

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Contributors

Author: Luigi Garziano
Author: Alessandro Ridolfo
Author: Salvatore Savasta

University divisions

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