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Quantum phase transition in a spin‐½ XX chain with three‐spin and uniform long‐range interactions
Author(s) -
Lou Ping
Publication year - 2005
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200541185
Subject(s) - metastability , spins , phase diagram , condensed matter physics , spin (aerodynamics) , quantum phase transition , phase transition , quantum spin liquid , physics , quantum , phase (matter) , superheating , chain (unit) , spin transition , quantum mechanics , spin polarization , thermodynamics , electron
A spin‐½ XX chain with three‐spin and uniform long‐range interactions among the z components of the spins is constructed. Based upon the model, using the Jordan–Wigner transformation, the thermodynamic quantities and spin transports of the system are evaluated exactly. The phase diagram together with the key parameters characterizing quantum phase transitions is presented. It is noted that, similarly to classical first‐order phase transitions, there are also the metastable states “supercooled” and “superheated” in the first‐order quantum phase transitions. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)