Thermal entanglement in one-dimensional Heisenberg quantum spin chains under magnetic fields

The thermal pairwise entanglement (TE) of the S=1/2 XY chain in a transverse magnetic field is exactly resolved by means of the Jordan-Wigner transformation in the thermodynamic limit N{yields}{infinity}. It is found that the TE vanishes at a fixed point with temperature T{sub c}{approx_equal}0.484...

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Veröffentlicht in:	Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2009-07, Vol.80 (1), Article 012323
Hauptverfasser:	Gong, Shou-Shu, Su, Gang
Format:	Artikel
Sprache:	eng
Schlagworte:	ANTIFERROMAGNETISM CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS FERROMAGNETISM HEISENBERG MODEL MAGNETIC FIELDS MATRICES MEAN-FIELD THEORY ONE-DIMENSIONAL CALCULATIONS QUANTUM ENTANGLEMENT RENORMALIZATION SPIN TRANSFORMATIONS
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