© 2026 Aqora Quantum S.A.S.

Terms Privacy Legal Notice

Acta Physica Sinica

Entropy squeezing of the optical field in k-photon Jaynes-Cummings model

Dongpeng Kang, Ren Min, Ma Ai-Qun, Qian Yan, Liu Zheng-jun, Shutian Liu, (1)广州大学工程抗震中心，广州 510405; (2)哈尔滨工业大学物理系，哈尔滨 150001; (3)哈尔滨工业大学物理系，哈尔滨 150001；广州大学城建学院，广州 510900；黑龙江大学物理科学与技术学院，哈尔滨 150080; (4)黑龙江大学物理科学与技术学院，哈尔滨 150080

Published Jan 1, 2008• 1 citation

Abstract

We investigated the field entropy squeezing of k-photon Jaynes-Cummings model，discuss the influence of the photon number k and the initial state of the atom on the entropy squeezing. The results show that with the photon numberk increasing，the position entropy squeezing will be enhanced and the momentum entropy squeezing reduced. When k≥3，the position entropy is always squeezed. The initial state of the atom also shows some influence on the entropy squeezing.

DOI: 10.7498/aps.57.873

Related papers

Entropy squeezing of an atom with a k -photon in the Jaynes–Cummings model

Dongpeng Kang, Liao Qing-Hong, Ahamd Muhammad Ashfaq +2 more

The entropy squeezing of an atom with a k -photon in the Jaynes–Cummings model is investigated. For comparison, we also study the corresponding variance squeezing and atomic inversion. Analytical results show that entropy squeezing is preferable to variance squeezing for zero atomic inversion. Moreover, for initial conditions of the system the relation between squeezing and photon transition number is also discussed. This provides a theoretical approach to finding out the optimal entropy squeezing.

Chinese Physics B•Jan 1, 2010•6 citations

Entropy squeezing of a multiphoton Jaynes-Cummings atom with the Glauber-Lachs state

Feng Chua

The information entropy squeezing properties of the atom interacting with the Glauber-Lachs state in multi-photon Jaynes-Cummings model are studied by means of the full quantum theory.The influences of the mean number of the coherent photons,the average number of the thermal photons,the number of the transition photons and the atomic initial state on the information entropy squeezing of the atom are discussed.The results indicate that there is no entropy squeezing in the Xcomponent of information entropy of the atom at any instant of the time evolution of the system.But there exists an entropy squeezing in the Ycomponent of information entropy of the atom during the time evolution when the mean number of coherent photons takes an appropriate value.The mean number of thermal photons and the number of the transition photons have a destructive effect on the Ycomponent of information entropy of the atom.The atomic initial state has no effect on the entropy squeezing in the Ycomponent of information entropy of the atom.If the number of the transition photons equals to two,the time evolution of the entropy squeezing factor appears periodic change.

Journal of Atomic and Molecular Physics•Jan 1, 2014•0 citations

Entropy squeezing of the field in the nonlinear J-C model

Mao-Fa Fang

The field entropy squeezing properties in the nonlinear Jaynes-Cummings model are studied by means of quantum information entropy, and the influences of the nonlinear interaction of the Kerr medium with the model field and the initial state of atoms on the field entropy squeezing are discussed. It shows that the nonlinear interaction of the Kerr medium can lead to an increase in the squeezing depth. On the other hand, the squeezing time and the squeezing depth increases with the increase of the atomic distribution angle.

Chinese Journal of Quantum Electronics•Jan 1, 2004•0 citations

Entropy squeezing for a two-level atom in the Jaynes-Cummings model with an intensity-depend coupling

Chun-Xian Li, Mao-Fa Fang

We study the squeezing for a two-level atom in the Jaynes-Cummings model with intensity-dependent coupling using quantum information entropy and examine the influences of the initial state of the system on the squeezed component number and direction of the information entropy squeezing. Our results show that, the squeezed component number depends on the atomic initial distribution angle, while the squeezed direction is determined by both the phases of the atom and the field for the information entropy squeezing. Quantum information entropy is shown to be a remarkable precision measure for atomic squeezing.

Chinese Physics•Feb 27, 2003•12 citations

Entropy squeezing for a two—level atom in the Jaynes—Cummings model with an intensity—depend coupling

李春先, 方卯发

We study the squeezing for a two-level atom in the Jaynes-Cumings model with intensity-dependent coupling using quantum information entropy,and examine the influences of the initial state of the system on the squeezed component number and direction of the information entropy squeezing.Our results show that,the squeezed component number depends on the atomic initial distribution angle,while the squeezed direction is determined by both the phases of the atom and the field for the information entropy squeezing.Quantum information entropy is shown to be a remarkable precision measure for atomic squeezing.

Chinese Physics B•Mar 16, 2005•0 citations

Entropy squeezing of a Jaynes–Cummings atom with the Glauber–Lachs state

Hünkar Kayhan

In this paper, we investigate the entropy squeezing of a two-level atom interacting with a quantum field prepared initially in the Glauber–Lachs state by using the Jaynes–Cummings model. We explore the effects of increasing the intensity of the thermal field over a fixed intensity of the coherent field on the entropy squeezing of the atom. We show that increasing the number of thermal photons in the coherent field has a destructive effect on the entropy squeezing of the atom.

Physica Scripta•Sep 8, 2011•4 citations

We investigated the field entropy squeezing of k-photon Jaynes-Cummings model，discuss the influence of the photon number k and the initial state of the atom on the entropy squeezing. The results show that with the photon numberk increasing，the position entropy squeezing will be enhanced and the momentum entropy squeezing reduced. When k≥3，the position entropy is always squeezed. The initial state of the atom also shows some influence on the entropy squeezing.

The entropy squeezing of an atom with a k -photon in the Jaynes–Cummings model is investigated. For comparison, we also study the corresponding variance squeezing and atomic inversion. Analytical results show that entropy squeezing is preferable to variance squeezing for zero atomic inversion. Moreover, for initial conditions of the system the relation between squeezing and photon transition number is also discussed. This provides a theoretical approach to finding out the optimal entropy squeezing.

The information entropy squeezing properties of the atom interacting with the Glauber-Lachs state in multi-photon Jaynes-Cummings model are studied by means of the full quantum theory.The influences of the mean number of the coherent photons,the average number of the thermal photons,the number of the transition photons and the atomic initial state on the information entropy squeezing of the atom are discussed.The results indicate that there is no entropy squeezing in the Xcomponent of information entropy of the atom at any instant of the time evolution of the system.But there exists an entropy squeezing in the Ycomponent of information entropy of the atom during the time evolution when the mean number of coherent photons takes an appropriate value.The mean number of thermal photons and the number of the transition photons have a destructive effect on the Ycomponent of information entropy of the atom.The atomic initial state has no effect on the entropy squeezing in the Ycomponent of information entropy of the atom.If the number of the transition photons equals to two,the time evolution of the entropy squeezing factor appears periodic change.

The field entropy squeezing properties in the nonlinear Jaynes-Cummings model are studied by means of quantum information entropy, and the influences of the nonlinear interaction of the Kerr medium with the model field and the initial state of atoms on the field entropy squeezing are discussed. It shows that the nonlinear interaction of the Kerr medium can lead to an increase in the squeezing depth. On the other hand, the squeezing time and the squeezing depth increases with the increase of the atomic distribution angle.

We study the squeezing for a two-level atom in the Jaynes-Cummings model with intensity-dependent coupling using quantum information entropy and examine the influences of the initial state of the system on the squeezed component number and direction of the information entropy squeezing. Our results show that, the squeezed component number depends on the atomic initial distribution angle, while the squeezed direction is determined by both the phases of the atom and the field for the information entropy squeezing. Quantum information entropy is shown to be a remarkable precision measure for atomic squeezing.

We study the squeezing for a two-level atom in the Jaynes-Cumings model with intensity-dependent coupling using quantum information entropy,and examine the influences of the initial state of the system on the squeezed component number and direction of the information entropy squeezing.Our results show that,the squeezed component number depends on the atomic initial distribution angle,while the squeezed direction is determined by both the phases of the atom and the field for the information entropy squeezing.Quantum information entropy is shown to be a remarkable precision measure for atomic squeezing.