期刊
OPTICS COMMUNICATIONS
卷 484, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.optcom.2020.126699
关键词
Squeezing; Triplet; Entanglement; Intracavity; Phase space
类别
资金
- Dodd-Walls Centre for Photonic and Quantum Technologies, New Zealand
The study analyzes the degenerate intracavity triplet down conversion process using quantum phase-space techniques, finding that quantum effects are most pronounced in the region immediately above the semi-classical pumping threshold. Through simulating time evolution, steady states, and calculating fluctuation spectra, regimes of squeezing, bipartite entanglement, and non-Gaussianity can be observed in the cavity output fields.
Triplet down conversion, the process of converting one high-energy photon into three low-energy photons, may soon be experimentally feasible in the optical regime, due to advances in optical resonator technology. We use quantum phase-space techniques to analyze the process of degenerate intracavity triplet down conversion by solving stochastic differential equations within the truncated positive-P representation. We simulate the time evolution of both intracavity fields, and examine the resulting steady-states as a function of the pump intensity. Quantum effects are most pronounced in the region immediately above the semi-classical pumping threshold, where our numerical results differ significantly from semi-classical predictions. We calculate steady-state fluctuation spectra and identify regimes of squeezing, bipartite entanglement, and non-Gaussianity measurable in the cavity output fields. We also validate the truncated positive-P description against Monte Carlo wave function simulations, finding good agreement for low mode populations.
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