Cavity assisted single- and two-mode spin-squeezed states via phase-locked atom-photon coupling

Abstract

We propose a scheme to realize the two-axis counter-twisting spin-squeezing Hamiltonian inside an optical cavity with the aid of phase-locked atom-photon coupling. By careful analysis and extensive simulation, we demonstrate that our scheme is robust against dissipation caused by cavity loss and atomic spontaneous emission, and it can achieve significantly higher squeezing than one axis twisting. We further show how our idea can be extended to generate two-mode spin-squeezed states in two coupled cavities. Due to its easy implementation and high tunability, our scheme is experimentally realizable with current technologies.

6 pages, 5 figures

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• Symmetry-breaking dynamics of the finite-size Lipkin-Meshkov-Glick model near ground state
• Simulating the Lipkin-Meshkov-Glick model in a hybrid quantum system
• Extreme Spin Squeezing from Deep Reinforcement Learning
• Quantum state engineering by periodical two-step modulation in atomic system