Semiclassical fluctuations in the quantum phase model

Mahn-Soo Choi, T. I. Um, M. Y. Choi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We consider the one-dimensional quantum phase model coupled to a thermal bath at finite temperatures and investigate the competition of quantum and thermal fluctuations. By means of a variational method, we obtain the effective classical Hamiltonian, which manifests a crossover from quantum to classical behaviors of the fluctuations. It is also shown that the peculiar nature of the quantum-phase model restricts the applicability of the otherwise well-working variational method to a certain range of quantum fluctuations.

Original languageEnglish
Pages (from-to)129-133
Number of pages5
JournalJournal of the Korean Physical Society
Volume38
Issue number2
Publication statusPublished - 2001 Feb 1
Externally publishedYes

Fingerprint

baths
crossovers
temperature

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Semiclassical fluctuations in the quantum phase model. / Choi, Mahn-Soo; Um, T. I.; Choi, M. Y.

In: Journal of the Korean Physical Society, Vol. 38, No. 2, 01.02.2001, p. 129-133.

Research output: Contribution to journalArticle

Choi, Mahn-Soo ; Um, T. I. ; Choi, M. Y. / Semiclassical fluctuations in the quantum phase model. In: Journal of the Korean Physical Society. 2001 ; Vol. 38, No. 2. pp. 129-133.
@article{8f7d4cdaa14c4a958da00b15eade3027,
title = "Semiclassical fluctuations in the quantum phase model",
abstract = "We consider the one-dimensional quantum phase model coupled to a thermal bath at finite temperatures and investigate the competition of quantum and thermal fluctuations. By means of a variational method, we obtain the effective classical Hamiltonian, which manifests a crossover from quantum to classical behaviors of the fluctuations. It is also shown that the peculiar nature of the quantum-phase model restricts the applicability of the otherwise well-working variational method to a certain range of quantum fluctuations.",
author = "Mahn-Soo Choi and Um, {T. I.} and Choi, {M. Y.}",
year = "2001",
month = "2",
day = "1",
language = "English",
volume = "38",
pages = "129--133",
journal = "Journal of the Korean Physical Society",
issn = "0374-4884",
publisher = "Korean Physical Society",
number = "2",

}

TY - JOUR

T1 - Semiclassical fluctuations in the quantum phase model

AU - Choi, Mahn-Soo

AU - Um, T. I.

AU - Choi, M. Y.

PY - 2001/2/1

Y1 - 2001/2/1

N2 - We consider the one-dimensional quantum phase model coupled to a thermal bath at finite temperatures and investigate the competition of quantum and thermal fluctuations. By means of a variational method, we obtain the effective classical Hamiltonian, which manifests a crossover from quantum to classical behaviors of the fluctuations. It is also shown that the peculiar nature of the quantum-phase model restricts the applicability of the otherwise well-working variational method to a certain range of quantum fluctuations.

AB - We consider the one-dimensional quantum phase model coupled to a thermal bath at finite temperatures and investigate the competition of quantum and thermal fluctuations. By means of a variational method, we obtain the effective classical Hamiltonian, which manifests a crossover from quantum to classical behaviors of the fluctuations. It is also shown that the peculiar nature of the quantum-phase model restricts the applicability of the otherwise well-working variational method to a certain range of quantum fluctuations.

UR - http://www.scopus.com/inward/record.url?scp=0035532458&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035532458&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0035532458

VL - 38

SP - 129

EP - 133

JO - Journal of the Korean Physical Society

JF - Journal of the Korean Physical Society

SN - 0374-4884

IS - 2

ER -