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

Haitham A.R. El-Ella

Research output: Contribution to journalArticlepeer-review

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 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.

Original languageEnglish
Article number023701
JournalPhysical Review A
Volume103
Issue number2
DOIs
Publication statusPublished - 2021

Subject classification (UKÄ)

  • Atom and Molecular Physics and Optics

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