The Generation of Two-mode Squeezed Vacuum of Radiation Field from Two-channel Atomic Reservoir

We investigate the efficiency of inseparability criteria in detecting the entanglement properties of two-mode non-Gaussian states of the electromagnetic field. We focus our study on the relevant class of two-mode squeezed number states. These states combine the entangling capability of two-mode squeezers with the non-Gaussian character (nonclassicality) of number states. They allow for some exact analytical treatments, and include as a particular case the two-mode Gaussian squeezed vacuum. We show that the generalized PPT criterion recently proposed by Shchukin and Vogel, based on higher order statistical moments, is very efficient in detecting the entanglement for this class of non-Gaussian states.

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SQUEEZING PROPERTIES OF COUPLED NONLINEAR OSCILLATORS

International Journal of Modern Physics B ◽

10.1142/s0217979290000346 ◽

1990 ◽

Vol 04 (04) ◽

pp. 659-676 ◽

Cited By ~ 14

Author(s):

VLADIMÍR BUŽEK ◽

IGOR JEX

Keyword(s):

Coherent State ◽

Time Evolution ◽

Radiation Field ◽

Anharmonic Oscillator ◽

Nonlinear Oscillators ◽

Vacuum State ◽

Squeezed Vacuum State ◽

Squeezed Vacuum ◽

Coupled Nonlinear Oscillators ◽

High Degree

In this paper the squeezing properties of the two-mode radiation field interacting with a nonliner nonabsorbing Kerr-like medium modelled as a two-mode anharmonic oscillator are studied. Time evolution of the variances of the radiation field initially prepared in the two-mode coherent state as well as the two-mode squeezed vacuum state are analyzed. In particular, it is shown that in the case when the radiation field is initially prepared in the two-mode coherent state the interaction between two modes leads to a high degree of squeezing.

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Superposition and entanglement of two-mode squeezed vacuum states

International Journal of Quantum Information ◽

10.1142/s021974991850003x ◽

2018 ◽

Vol 16 (01) ◽

pp. 1850003 ◽

Cited By ~ 1

Author(s):

Amir Karimi

Keyword(s):

Radiation Field ◽

Vacuum State ◽

Squeezed Vacuum ◽

Vacuum States ◽

Squeezing Operator ◽

Parity Operator

In this paper, by using the parity operator as well as the two-mode squeezing operator, we define new operators which by the action of them on the vacuum state of the two-mode radiation field, superposition of two two-mode squeezed vacuum states and entangled two-mode squeezed vacuum states are generated.

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Squeezing Properties in Mesoscopic Josephson Junction with Nonclassical Radiation Field

Modern Physics Letters B ◽

10.1142/s0217984998000731 ◽

1998 ◽

Vol 12 (16) ◽

pp. 623-631 ◽

Cited By ~ 7

Author(s):

Shao Bin ◽

Zou Jian ◽

Li Qian-Shu

Keyword(s):

Josephson Junction ◽

Radiation Field ◽

Energy State ◽

Vacuum State ◽

Squeezed Vacuum

We consider a system of mesoscopic Josephson junction interacting with nonclassical radiation field and investigate any order squeezing for the mesoscopic Josephson junction subsystem. Our results show that if the field is initially prepared in a squeezed vacuum and the junction is in its lowest energy state (the vacuum state), then as the time evolves the Josephson junction subsystem can exhibit any order squeezing.

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HIGHER-ORDER SQUEEZING DEGREE IN MESOSCOPIC JOSEPHSON JUNCTION IN THE PRESENCE OF NONCLASSICAL RADIATION FIELD

Modern Physics Letters B ◽

10.1142/s021798490000029x ◽

2000 ◽

Vol 14 (06) ◽

pp. 203-209 ◽

Cited By ~ 2

Author(s):

V. A. POPESCU

Keyword(s):

Electromagnetic Field ◽

Josephson Junction ◽

Radiation Field ◽

Vacuum State ◽

Higher Order ◽

Squeezed Vacuum State ◽

Usual Procedure ◽

Superconducting Ring ◽

Squeezed Vacuum ◽

Quantum Current

Higher-order squeezing degree in mesoscopic Josephson junction of a circular superconducting ring can be improved if the electromagnetic field is initially in a successive squeezed vacuum state. We compare our method with the usual procedure for higher-order squeezing and consider the effect of different small inductances on the 2Nth-order squeezing degree for quantum current.

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Characteristics of Aharonov–Bohm Electron Interference in Two-Mode Squeezed Vacuum

International Journal of Modern Physics B ◽

10.1142/s0217979298000648 ◽

1998 ◽

Vol 12 (11) ◽

pp. 1171-1185 ◽

Cited By ~ 1

Author(s):

Bin Shao ◽

Jian Zou

Keyword(s):

Coherent State ◽

Radiation Field ◽

Quantum Fluctuation ◽

Temporal Behavior ◽

Shapiro Steps ◽

Squeezed Vacuum ◽

Bohm Effect ◽

Electron Interference ◽

Quantized Radiation Field ◽

Aharonov Bohm

Electron interference related to Aharonov–Bohm effect in the presence of the two-mode quantized radiation field is investigated. Characteristics of Shapiro steps, the visibility of the interference fringe and the temporal behavior of electron interference in correlated and uncorrelated two-mode radiation field are discussed. It is shown that for the correlated two-mode squeezed vacuum the integer Shapiro steps are obtained and the time evolution of the intensity of electron interference can exhibit very interesting periodic spontaneous collapse and revival (CR), while for the uncorrelated two-mode coherent state the fractional Shapiro steps are obtained and the CR phenomenon does not occur. In addition, the relation between CR and the quantum fluctuation in electron interference is also discussed.

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