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Driven quadrature and spin squeezing in a cavity-coupled ensemble of two-level states

El-Ella, Haitham A.R. LU orcid (2021) In Physical Review A 103(2).
Abstract

The generated magnitude of quadrature squeezing in a cavity-coupled ensemble, which is continuously driven using a coherent off-axis field, is theoretically explored. Using a truncated set of equations of motion derived from a Dicke Hamiltonian, steady-state quadrature squeezing of the cavity field is numerically calculated to approach a limit of -3dB, while frequency-modulated quadrature squeezing approaches a limit of -14dB, in the absence of pure dephasing and as a function of the ensemble's size and detuning. The impact of pure dephasing on steady-state quadrature squeezing is shown to be mitigated by increased detuning of the driving field, while frequency-modulated squeezing is only shielded in a regime where the cumulative... (More)

The generated magnitude of quadrature squeezing in a cavity-coupled ensemble, which is continuously driven using a coherent off-axis field, is theoretically explored. Using a truncated set of equations of motion derived from a Dicke Hamiltonian, steady-state quadrature squeezing of the cavity field is numerically calculated to approach a limit of -3dB, while frequency-modulated quadrature squeezing approaches a limit of -14dB, in the absence of pure dephasing and as a function of the ensemble's size and detuning. The impact of pure dephasing on steady-state quadrature squeezing is shown to be mitigated by increased detuning of the driving field, while frequency-modulated squeezing is only shielded in a regime where the cumulative coupling and driving rates are in excess of the pure-dephasing rate. Spin-squeezed entanglement is also calculated to occur simultaneously with weakly driven frequency-modulated quadrature squeezing.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review A
volume
103
issue
2
article number
023701
publisher
American Physical Society
external identifiers
  • scopus:85100963432
ISSN
2469-9926
DOI
10.1103/PhysRevA.103.023701
language
English
LU publication?
yes
id
af635d07-37e7-4832-ad07-0c60811671c2
date added to LUP
2021-03-02 08:00:21
date last changed
2022-04-27 00:27:37
@article{af635d07-37e7-4832-ad07-0c60811671c2,
  abstract     = {{<p>The generated magnitude of quadrature squeezing in a cavity-coupled ensemble, which is continuously driven using a coherent off-axis field, is theoretically explored. Using a truncated set of equations of motion derived from a Dicke Hamiltonian, steady-state quadrature squeezing of the cavity field is numerically calculated to approach a limit of -3dB, while frequency-modulated quadrature squeezing approaches a limit of -14dB, in the absence of pure dephasing and as a function of the ensemble's size and detuning. The impact of pure dephasing on steady-state quadrature squeezing is shown to be mitigated by increased detuning of the driving field, while frequency-modulated squeezing is only shielded in a regime where the cumulative coupling and driving rates are in excess of the pure-dephasing rate. Spin-squeezed entanglement is also calculated to occur simultaneously with weakly driven frequency-modulated quadrature squeezing.</p>}},
  author       = {{El-Ella, Haitham A.R.}},
  issn         = {{2469-9926}},
  language     = {{eng}},
  number       = {{2}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review A}},
  title        = {{Driven quadrature and spin squeezing in a cavity-coupled ensemble of two-level states}},
  url          = {{http://dx.doi.org/10.1103/PhysRevA.103.023701}},
  doi          = {{10.1103/PhysRevA.103.023701}},
  volume       = {{103}},
  year         = {{2021}},
}