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

Quantum Optics Journal of the European Optical Society Part B

Minimum squeezing to make a two-mode thermal state non-classical

C T Lee

Published Jun 1, 1990• 2 citations
Publisher

Abstract

Based on a criterion for non-classical effects in two-mode radiations recently introduced by the author and using the thermofield representation of thermal states, an expression for the minimum degree of squeezing necessary to make a two-mode thermal radiation non-classical is derived.
DOI
10.1088/0954-8998/2/3/002

Related papers

Two-mode squeezed states with thermal noise

Ching Tsung Lee

The thermofield introduced by Takahashi and Umezawa [Collect. Phenom. 2, 55 (1975)] is used to represent the thermal noise; it is generated from the absolute vacuum by a so-called thermalizing operator and serves as the initial state for generating two-mode squeezed states by squeeze and displacement operators. The ones obtained by applying the squeeze operator first followed by the displacement operator are called coherent squeezed states, while the others obtained by applying the displacement operator first are called squeezed coherent states. A criterion for the existence of nonclassical photon statistics in a two-mode radiation introduced by us in a previous paper [Phys. Rev. A 42, 1609 (1990)] is then used to study the conditions for the two types of squeezed states to be nonclassical states. Several three-dimensional plots are presented to illustrate the effects of thermal noise on squeezed states.

Physical Review A•Oct 1, 1990•31 citations

Non-classical effects of two-mode photon-added displaced squeezed states

Xiang‐Bin Wang, L. C. Kwek, Yong Liu +1 more

Photon-added states which could be detected through the emission rather than absorption of electromagnetic radiation have recently been actively explored and investigated. In this paper, we study the non-classical effects associated with two-mode photon-added displaced squeezed states and discuss some of their intriguing non-classical behaviour.

Journal of Physics B Atomic Molecular and Optical Physics•Mar 14, 2001•30 citations

A CRITERION FOR NON-CLASSICAL STATE OF LIGHT

Demin Yao, Guo Guang-Can, (1)中国科学技术大学基础物理中心; (2)中国科学技术大学物理系

A general criterion for non-classical state of light is given, by which two kinds of non-classical single-mode states (antibunching and squeezing) are discussed in detail.

Acta Physica Sinica•Jan 1, 1988•2 citations

Thermofield analysis of squeezing and statistical mixtures in quantum optics

Stephen Mark Barnett, P. L. Knight

We investigate the representation of mixed states in quantum optics by pure states in an expanded-state space. This thermofield representation is used to describe interactions involving thermal averages and, in particular, interactions involving parametric couplings. We find the thermofield representation of utility in the analysis of non-classical aspects of photon statistics, such as two-mode squeezing of light fluctuations.

Journal of the Optical Society of America B•Mar 1, 1985•231 citations

Bounds for entanglement of formation of two mode squeezed thermal states

Xiaoyu Chen, Peiliang Qiu

arXiv:quant-ph/0303145•Physics Letters A•Jun 30, 2003•13 citations

Squeezing the quantum fluctuations of light

Gerd Leuchs

This paper is intended to be an introduction to the field of non-classical light. Starting from a pictorial discussion of the properties of the radiation field, examples for the generation and possible applications of squeezed states of the light field are given.

Contemporary Physics•May 1, 1988•33 citations
The thermofield introduced by Takahashi and Umezawa [Collect. Phenom. 2, 55 (1975)] is used to represent the thermal noise; it is generated from the absolute vacuum by a so-called thermalizing operator and serves as the initial state for generating two-mode squeezed states by squeeze and displacement operators. The ones obtained by applying the squeeze operator first followed by the displacement operator are called coherent squeezed states, while the others obtained by applying the displacement operator first are called squeezed coherent states. A criterion for the existence of nonclassical photon statistics in a two-mode radiation introduced by us in a previous paper [Phys. Rev. A 42, 1609 (1990)] is then used to study the conditions for the two types of squeezed states to be nonclassical states. Several three-dimensional plots are presented to illustrate the effects of thermal noise on squeezed states.