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arXiv · 2601.01519

Entropy and Variance Squeezing of V-type Atom in Dissipative Cavity

Zijin Liang·Qiying Pan·Hong-Mei Zou·Chenrui Bi
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Abstract

Based on Ref.\cite{Riccardi A}, we investigate the entropy and variance squeezing of a V-type atom in a dissipative cavity, and discuss the influences of parameters including the spontaneously generated interference (SGI) ($\theta$), the cavity-environment coupling ($\gamma_0/\kappa$) and the atom-cavity detuning ($\Delta$) on the atomic squeezing by using different initial states. The results show that no squeezing of $S_y$ occurs under any condition and that variance squeezing of $S_x$ appears only when $\Delta>0$. Entropy squeezing quantifies quantum fluctuations more precisely than variance squeezing. Moreover, the atomic squeezing of $S_x$ clearly depends on $\theta$, $\gamma_0/\kappa$, $\Delta$ and the initial state. These findings are meaningful for quantum information processing as an ultra-low-noise resource.

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Zijin Liang, Qiying Pan, Hong-Mei Zou, Chenrui Bi. 2026-01-04. Entropy and Variance Squeezing of V-type Atom in Dissipative Cavity. https://arxiv.org/abs/2601.01519

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