Variance squeezing and information entropy squeezing via Bloch coherent states in two-level nonlinear spin models

Grinberg, Horacio

doi:10.1016/j.ijleo.2014.07.065

Cited by 4 publications

(3 citation statements)

References 30 publications

(38 reference statements)

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“…In fact, the atomic squeezing has always been a hot topic researches [26][27][28][29][30][31]. However, the variance squeezing neglects higher-order statistical moments and is an appropriate measure of the uncertainty in some cases.…”

Section: Discussionmentioning

confidence: 99%

Squeezing of a two-level system due to classical phase noisy laser

Guo

2020

Laser Phys. Lett.

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Based on the Heisenberg uncertainty relation and the entropy uncertainty relation, the nonclassical effects described by variance squeezing and entropy squeezing for a two-level system driven by a classical phase noisy laser are investigated. Analytical expressions of the variance squeezing and entropy squeezing subjected to the classical phase noisy laser are derived. Our results show that the nonclassical squeezed effects can be protected for a long time in both the Markovian and non-Markovian regions by controlling the ratios between the phase diffusion rate and the system-laser coupling strength. Besides, we also develop an effective strategy to enhance the nonclassical squeezed effects with the help of filtering operation. The underlying physical mechanism to enhance the squeezing is also analyzed.

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Section: Discussionmentioning

confidence: 99%

Squeezing of a two-level system due to classical phase noisy laser

Guo

2020

Laser Phys. Lett.

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“…In this context it is worth noting that several new applications of these nonclassical states have been reported in recent past [3][4][5][6][7]. As a consequence of these recently reported applications, generation of nonclassical states in various quantum systems emerged as one of the most important areas of interest in quantum information theory and quantum optics [8,9]. Several systems are already investigated and have been shown to produce entanglement and other nonclassical states [10,11].…”

Section: Introductionmentioning

confidence: 97%

Nonclassical effects in the second harmonic generation

Grinberg

2016

Optik

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“…The quantification of the squeezing in the quantum system has been established in terms of variance squeezing [6,7] based on the famous Heisenberg uncertainty relations [8,9] and entropy squeezing [10] with respect to entropy uncertainty relations [11,12]. Using variance squeezing approach the squeezing of various models [13][14][15][16][17][18] have been intensely studied in recent years. Correspondingly, the squeezing based on entropy squeezing also have been discussed in detail for the Jaynes-Cummings model [10,[19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Entropy squeezing for a generalized amplitude damping model

He¹,

Huang²,

Nie³

2021

Laser Phys. Lett.

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We study the evolution of the squeezing quantified by entropy squeezing in an amplitude damping model consisting of N noninteracting qubits coupled to a common reservoir. We demonstrate that even in the Markovian regime the squeezing of considered qubit system can be effectively protected by selecting the number of qubits in reservoir. Especially, the steady squeezing of a qubit system can be obtained for the Markivan and non-Markovian regimes. The corresponding physical mechanism for enhancing the squeezing is also given. We also compare the differences between the considered amplitude damping model and other two types of amplitude damping models for the conditions of squeezing-protection, and find that although one use different methods to improve the squeezing they can be explained by a unified physical mechanism.

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Variance squeezing and information entropy squeezing via Bloch coherent states in two-level nonlinear spin models

Cited by 4 publications

References 30 publications

Squeezing of a two-level system due to classical phase noisy laser

Squeezing of a two-level system due to classical phase noisy laser

Nonclassical effects in the second harmonic generation

Entropy squeezing for a generalized amplitude damping model

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