NONZERO-TEMPERATURE COHERENT AND SQUEEZED STATES FOR THE HARMONIC-OSCILLATOR - THE TIME-DEPENDENT FREQUENCY CASE

被引：31

作者：

ALIAGA, J

CRESPO, G

PROTO, AN

机构：

[1] Laboratorio de Física, Comisian Nacional de Investigaciones Espaciales, 1638 Vicente Lapez

来源：

PHYSICAL REVIEW A | 1990年 / 42卷 / 01期

关键词：

D O I：

10.1103/PhysRevA.42.618

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present a density-matrix method, based on information theory, which makes it possible to find nonzero-temperature coherent and squeezed states for the harmonic oscillator with time-dependent frequency. We establish a connection between the appearance of squeezed states and the relevant operators included in the density matrix, compare our results with previous ones that were obtained using wave functions, and analyze the particular case of a sudden jump in the oscillator s frequency. © 1990 The American Physical Society.

引用

页码：618 / 626

页数：9

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