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Correlation Functions at Quantum Criticality under Broken Time-Reversal Symmetry

Title
Correlation Functions at Quantum Criticality under Broken Time-Reversal Symmetry
Author
차민철
Keywords
quantum phase transition; critical phenomena; correlation function
Issue Date
2008-02
Publisher
KOREAN PHYSICAL SOC
Citation
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v. 52, Page. S158-S161
Abstract
We investigate correlation functions in critical phenomena at zero temperature. We find that the equal-time correlation function of a quantum system at criticality does not have a diverging correlation length in the absence of time-reversal symmetry. We illustrate our main results analytically in the quantum spherical model as well as more explicitly by Monte Carlo calculations in the two-dimensional quantum rotor model.
URI
http://www.jkps.or.kr/journal/view.html?uid=9542&vmd=Fullhttps://repository.hanyang.ac.kr/handle/20.500.11754/76790
ISSN
0374-4884
DOI
10.3938/jkps.52.158
Appears in Collections:
COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E](과학기술융합대학) > PHOTONICS AND NANOELECTRONICS(나노광전자학과) > Articles
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