Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Acta Optica Sinica

Influence of initial atomic coherence on squeezing of radiative field in the two-photon Jaynes-Cummings model

Xiuli Xu, Ce Zhou

Published Jan 1, 1992• 0 citations
OpenAlex

Abstract

In this paper, the general evolution laws of the two-photon Jaynes-Cummings model with initially arbitrary states have been investigated. And the emphasis is put on the influenec of the initial atomic coherence on the squeezing of radiative field in the two-photon Jaynes-Oummings model. As an example, the squeezing of the field in the interaction of a two-level atom of arbitrary initial states with the vacuum and coherent field is studied, and the squeezing of the field under various conditions has been calculated numerically.

Related papers

SQUEEZING IN A TWO-PHOTON JAYNES-CUMMINGS MODEL

GU QIAO, 西北大学物理系

The quatum statistical properties of two-photon radiation from two-level atomic system are investigated by using complete set in the nth subspace of generalized Jaynes-Cummings hamiltonian, and the general expression for field variance is obtained. The conditions for optimum squeezing as well as the optimum squeezed quantity are found out for an arbitrary initial state, and the time evolution of the optimum squeezed state is then analysed. As an example, the squeezing in an initial state with bare atomic system in thermal equilibrium is discussed, which demonstrates the dependence of squeezing on several parameters, such as, temperature, detuning, coupling strength. The conditions for squeezing are given analytically and numerically. Finally, the physical picture of the squeezing is pointed out.

Acta Physica Sinica•Jan 1, 1988•2 citations

k-photon Jaynes-Cummings model with coherent atomic preparation: Squeezing and coherence

W. Vogel, D.‐G. Welsch

The k-photon Jaynes-Cummings model is studied with respect to the properties of the radiation mode. In particular, the generation of coherence and squeezing in the one- and two-photon model is examined for the case that the field is initially in the vacuum state and the atom is prepared in a coherent superposition of states. Coherence is found in the one-photon model, and squeezing appears in both the one- and the two-photon model, the maximum noise reduction being 25% and 45%, respectively. In the one-photon model coherent squeezed radiation is generated, whereas the two-photon model yields a squeezed vacuum. For an initial atomic preparation close to the ground state, this squeezed vacuum may be interpreted as the result of two-photon interaction between the quantized cavity field and a classical atomic current.

Physical Review A•Dec 1, 1989•46 citations

ATOMIC DIPOLE SQUEEZING IN OFF RESONANCE TWO-PHOTON JAYNES-CUMMINGS MODEL

You-Bang Zhan, 淮阴师范专科学校物理系,中国高等科学技术中心(世界实验室)

In the present paper, considering the detuning and the initial atomic coherence, dipole squeezing in two-photon Jaynes-Cummings model is investigated by means of the time-evolution operator method. The influence of the frequency detuning on the dipole squeezing in interaction of field with atom and the relation between the mean photon number and the dipole squeezing are studied by numerical calculations.

Acta Physica Sinica•Jan 1, 1994•0 citations

Multiphoton model for the interaction of single-mode squeezed-state light with a two-level atom

Shaozheng Jin

Multiphoton interaction of single-mode squeezed-state light and a two-level atom is considered based on the K-photon Jaynes–Cummings model. Time evolution of quantum fluctuation and photon statistical properties of the initial squeezing light are discussed. It is found that through interaction with a two-level atom, larger squeezing levels cannot be achieved in one-photon or multiphoton processes. For photon antibunching behavior of the light field, it is shown that a smaller initial squeezing level and an appropriately larger coherent part of the initial average photon number of the radiation field favor the generation of this nonclassical behavior, especially in the lower-order interaction processes.

Journal of the Optical Society of America B•Mar 1, 1991•2 citations

Multiphoton interaction or squeezed light with a phased atom

Changxin Wang, Reeta Vyas

Evolution of the squeezed state in a multiphoton Jaynes–Cummings model (JCM) when the field is interacting with an atom prepared initially in a coherent superposition of the ground state and the excited state is studied. Long time and short time evolution of field statistics are discussed and compared with the standard JCM. These properties are found to be sensitive to the initial phase of the atom. For a phased atom, squeezing at later times can be larger than the initial squeezing. It is found that two-photon interaction of a suitably prepared phased atom with the initial vacuum state can yield 45% squeezing below the vacuum noise limit. Multiphoton interaction of a phased atom with the initial vacuum state of the field leads periodically to a pure field state that is a coherent superposition of the vacuum state and the n-photon Fock state.

Annual Meeting Optical Society of America•Jan 1, 1992•0 citations

State Evolution in the Two-photon Jaynes-Cummings Model with Initial Squeezed Vacuum and Chaotic Fields

Ho Trung Dung, E.I. Aliskenderov, L. Knöll

An approximate treatment is given for the state evolution in the two-photon Jaynes-Cummings model with initial squeezed vacuum and chaotic state fields. Both initially pure and mixed atomic states are examined. Interesting features such as the evolution of the atom into unique pure states and the recurrence of the initial atomic states at certain times are found. Effects of the dynamic Stark shifts on the system state evolution are also studied.

Journal of Modern Optics•May 1, 1995•2 citations
In this paper, the general evolution laws of the two-photon Jaynes-Cummings model with initially arbitrary states have been investigated. And the emphasis is put on the influenec of the initial atomic coherence on the squeezing of radiative field in the two-photon Jaynes-Oummings model. As an example, the squeezing of the field in the interaction of a two-level atom of arbitrary initial states with the vacuum and coherent field is studied, and the squeezing of the field under various conditions has been calculated numerically.
The quatum statistical properties of two-photon radiation from two-level atomic system are investigated by using complete set in the nth subspace of generalized Jaynes-Cummings hamiltonian, and the general expression for field variance is obtained. The conditions for optimum squeezing as well as the optimum squeezed quantity are found out for an arbitrary initial state, and the time evolution of the optimum squeezed state is then analysed. As an example, the squeezing in an initial state with bare atomic system in thermal equilibrium is discussed, which demonstrates the dependence of squeezing on several parameters, such as, temperature, detuning, coupling strength. The conditions for squeezing are given analytically and numerically. Finally, the physical picture of the squeezing is pointed out.
The k-photon Jaynes-Cummings model is studied with respect to the properties of the radiation mode. In particular, the generation of coherence and squeezing in the one- and two-photon model is examined for the case that the field is initially in the vacuum state and the atom is prepared in a coherent superposition of states. Coherence is found in the one-photon model, and squeezing appears in both the one- and the two-photon model, the maximum noise reduction being 25% and 45%, respectively. In the one-photon model coherent squeezed radiation is generated, whereas the two-photon model yields a squeezed vacuum. For an initial atomic preparation close to the ground state, this squeezed vacuum may be interpreted as the result of two-photon interaction between the quantized cavity field and a classical atomic current.
Multiphoton interaction of single-mode squeezed-state light and a two-level atom is considered based on the K-photon Jaynes–Cummings model. Time evolution of quantum fluctuation and photon statistical properties of the initial squeezing light are discussed. It is found that through interaction with a two-level atom, larger squeezing levels cannot be achieved in one-photon or multiphoton processes. For photon antibunching behavior of the light field, it is shown that a smaller initial squeezing level and an appropriately larger coherent part of the initial average photon number of the radiation field favor the generation of this nonclassical behavior, especially in the lower-order interaction processes.
Evolution of the squeezed state in a multiphoton Jaynes–Cummings model (JCM) when the field is interacting with an atom prepared initially in a coherent superposition of the ground state and the excited state is studied. Long time and short time evolution of field statistics are discussed and compared with the standard JCM. These properties are found to be sensitive to the initial phase of the atom. For a phased atom, squeezing at later times can be larger than the initial squeezing. It is found that two-photon interaction of a suitably prepared phased atom with the initial vacuum state can yield 45% squeezing below the vacuum noise limit. Multiphoton interaction of a phased atom with the initial vacuum state of the field leads periodically to a pure field state that is a coherent superposition of the vacuum state and the n-photon Fock state.