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Qubit-flip-induced cavity mode squeezing in the strong dispersive regime of the quantum Rabi model

Qubit-flip-induced cavity mode squeezing in the strong dispersive regime of the quantum Rabi model
Qubit-flip-induced cavity mode squeezing in the strong dispersive regime of the quantum Rabi model
Squeezed states of light are a set of nonclassical states in which the quantum fluctuations of one quadrature component are reduced below the standard quantum limit. With less noise than the best stabilised laser sources, squeezed light is a key resource in the field of quantum technologies and has already improved sensing capabilities in areas ranging from gravitational wave detection to biomedical applications. In this work we propose a novel technique for generating squeezed states of a confined light field strongly coupled to a two-level system, or qubit, in the dispersive regime. Utilising the dispersive energy shift caused by the interaction, control of the qubit state produces a time-dependent change in the frequency of the light field. An appropriately timed sequence of sudden frequency changes reduces the quantum noise fluctuations in one quadrature of the field well below the standard quantum limit. The degree of squeezing and the time of generation are directly controlled by the number of frequency shifts applied. Even in the presence of realistic noise and imperfections, our protocol promises to be capable of generating a useful degree of squeezing with present experimental capabilities.
2045-2322
Joshi, Chaitanya
f466678c-598d-449e-bda6-1f8fb25ad329
Irish, Elinor K.
b78b8d7c-c747-4437-bb6f-189186713998
Spiller, Timothy P.
46d26b16-f740-4ac7-ab31-328f312c4969
Joshi, Chaitanya
f466678c-598d-449e-bda6-1f8fb25ad329
Irish, Elinor K.
b78b8d7c-c747-4437-bb6f-189186713998
Spiller, Timothy P.
46d26b16-f740-4ac7-ab31-328f312c4969

Joshi, Chaitanya, Irish, Elinor K. and Spiller, Timothy P. (2017) Qubit-flip-induced cavity mode squeezing in the strong dispersive regime of the quantum Rabi model. Scientific Reports, 7, [45587]. (doi:10.1038/srep45587).

Record type: Article

Abstract

Squeezed states of light are a set of nonclassical states in which the quantum fluctuations of one quadrature component are reduced below the standard quantum limit. With less noise than the best stabilised laser sources, squeezed light is a key resource in the field of quantum technologies and has already improved sensing capabilities in areas ranging from gravitational wave detection to biomedical applications. In this work we propose a novel technique for generating squeezed states of a confined light field strongly coupled to a two-level system, or qubit, in the dispersive regime. Utilising the dispersive energy shift caused by the interaction, control of the qubit state produces a time-dependent change in the frequency of the light field. An appropriately timed sequence of sudden frequency changes reduces the quantum noise fluctuations in one quadrature of the field well below the standard quantum limit. The degree of squeezing and the time of generation are directly controlled by the number of frequency shifts applied. Even in the presence of realistic noise and imperfections, our protocol promises to be capable of generating a useful degree of squeezing with present experimental capabilities.

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More information

Accepted/In Press date: 28 February 2017
e-pub ahead of print date: 30 March 2017
Published date: 30 March 2017
Organisations: Quantum, Light & Matter Group

Identifiers

Local EPrints ID: 411183
URI: http://eprints.soton.ac.uk/id/eprint/411183
ISSN: 2045-2322
PURE UUID: 3df3b2f2-2435-4d3e-9f1d-c46ef1f2d27f

Catalogue record

Date deposited: 15 Jun 2017 16:31
Last modified: 21 Nov 2021 07:03

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Contributors

Author: Chaitanya Joshi
Author: Elinor K. Irish
Author: Timothy P. Spiller

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