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This study investigates entropy and variance squeezing in a V-type atom within a dissipative cavity, offering theoretical insights into quantum fluctuations relevant to ultra-low-noise resources for information processing. However, the paper is currently withdrawn due to critical errors involving incorrect entropy calculations and inconsistencies between spin operators and density matrices. Consequently, these findings cannot be validated until rigorous corrections are made by the authors or independent researchers.
Entropy and Variance Squeezing of V-type Atom in Dissipative Cavity
arXiv:2601.01519v2 Announce Type: replace 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.
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.
Withdrawal due to errors: (1) entropy squeezing calculated with wrong information entropy, inconsistent with cited entropic uncertainty relation Eq. (25); (2) basis inconsistency between spin operators and reduced density matrix
arXiv:2601.01519 [quant-ph]
(or arXiv:2601.01519v2 [quant-ph] for this version)
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