Quantum phase transition in dimerised spin-1/2 chains

被引：0
作者：
Das, Aparajita [1 ]
Bhadra, Sreeparna [1 ]
Saha, Sonali [2 ]
机构：
[1] Acharya Prafulla Chandra Coll, New Barrackpore, India
[2] Sarojini Naidu Coll Women, Kolkata, India
来源：
QUANTUM INFORMATION PROCESSING | 2015年 / 14卷 / 11期
关键词：
Quantum phase transition; Concurrence; Dimerised Heisenberg chain; GROUND-STATE SYSTEM; MAGNETIC-PROPERTIES; ENTANGLEMENT; DYNAMICS; CU(NO3)2.21/2H2O; INFORMATION; CRITICALITY; MODEL; SPINS;
D O I：
10.1007/s11128-015-1116-8
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Quantum phase transition in dimerised antiferromagnetic Heisenberg spin chain has been studied. A staircase structure in the variation of concurrence within strongly coupled pairs with that of external magnetic field has been observed indicating multiple critical (or critical like) points. Emergence of entanglement due to external magnetic field or magnetic entanglement is observed for weakly coupled spin pairs too in the same dimer chain. Though closed dimerised isotropic XXX Heisenberg chains with different dimer strengths were mainly explored, analogous studies on open chains as well as closed anisotropic (XX interaction) chains with tilted external magnetic field have also been studied.
引用
收藏
页码：4089 / 4102
页数：14
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