Semiclassical fluctuations in the quantum phase model

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

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


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
Issue number2
Publication statusPublished - 2001 Feb
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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