scholarly journals Phase transition for loop representations of quantum spin systems on trees

2018 ◽  
Vol 59 (11) ◽  
pp. 113302 ◽  
Author(s):  
Volker Betz ◽  
Johannes Ehlert ◽  
Benjamin Lees
Keyword(s):  
Phase Transition ◽  
Quantum Spin ◽  
Spin Systems ◽  
Quantum Spin Systems

Zero-temperature properties of quantum spin systems in two dimensions

1990 ◽  
Vol 68 (12) ◽  
pp. 1410-1418 ◽  
Author(s):  
D. D. Betts ◽  
S. Miyashita
Keyword(s):  
Phase Transition ◽  
Order Parameter ◽  
Magnetic Phase ◽  
Finite Lattice ◽  
Two Dimensions ◽  
Quantum Spin ◽  
Spin Systems ◽  
Heisenberg Antiferromagnet ◽  
Zero Temperature ◽  
Quantum Spin Systems

We consider the zero-temperature properties of four different spin 1/2 models on two-dimensional lattices: the XY ferromagnet, the XY antiferromagnet, the Heisenberg antiferromagnet, and the Dzyaloshinsky–Moriya models. Most of this article is a review of previously published work, but a few previously unpublished results are included. The relation between three of the models on bipartite lattices is described. The properties of the XY ferromagnet in two dimensions, especially those derived from extrapolation of finite lattice results, are reviewed. A numerical factor by which spin-wave and finite-lattice estimates of the long-range order parameter differ is discussed. For frustrated models on the triangular lattice the possibility of a chirality phase transition instead of, or in addition to, a magnetic phase transition is considered.

scholarly journals Quantum Spin Systems at Positive Temperature

2006 ◽  
Vol 269 (3) ◽  
pp. 611-657 ◽  
Author(s):  
Marek Biskup ◽  
Lincoln Chayes ◽  
Shannon Starr
Keyword(s):  
Quantum Spin ◽  
Spin Systems ◽  
Positive Temperature ◽  
Quantum Spin Systems

High-field ESR in one-dimensional quantum spin systems

2000 ◽  
Vol 284-288 ◽  
pp. 1625-1626 ◽  
Author(s):  
Y Ajiro ◽  
T Asano ◽  
Y Inagaki ◽  
J.P Boucher ◽  
S Luther ◽  
...  
Keyword(s):  
High Field ◽  
Quantum Spin ◽  
Spin Systems ◽  
Quantum Spin Systems ◽  
One Dimensional ◽  
High Field Esr

scholarly journals Measures of macroscopicity for quantum spin systems

2012 ◽  
Vol 14 (9) ◽  
pp. 093039 ◽  
Author(s):  
Florian Fröwis ◽  
Wolfgang Dür
Keyword(s):  
Quantum Spin ◽  
Spin Systems ◽  
Quantum Spin Systems

Dissipative dynamics for quantum spin systems on a lattice

1998 ◽  
Vol 31 (8) ◽  
pp. 2045-2056 ◽  
Author(s):  
Adam W Majewski ◽  
Robert Olkiewicz ◽  
Boguslaw Zegarlinski
Keyword(s):  
Quantum Spin ◽  
Spin Systems ◽  
Quantum Spin Systems ◽  
Dissipative Dynamics
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