On the phase diagram of the anisotropic XY chain in transverse magnetic field
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- 作者：Tomasz Maci膮偶eka ; maciazek@cft.edu.pl" class="auth_mail" title="E-mail the corresponding author ; Jacek Wojtkiewiczb ; wjacek@fuw.edu.pl" class="auth_mail" title="E-mail the corresponding author
- 关键词：Quantum spin chains ; Heisenberg XY model ; Ground state energy ; Critical exponents ; Phase transitions
- 刊名：Physica A: Statistical Mechanics and its Applications
- 出版年：2016
- 出版时间：1 January 2016
- 年：2016
- 卷：441
- 期：Complete
- 页码：131-140
- 全文大小：581 K
文摘
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Extensive study of the ground energy of the XY chain in transverse magnetic field.
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Explicit proof of the ground energy smoothness on the oscillatory–ferromagnetic line.
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Ground state energy expansions around all singular points are calculated.
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Detailed numerical analysis of the gap energy of the open chain.