The ground-state entanglement in the spin-XX chain with a magnetization current

• 来源期刊: 中国物理B（英文版）
• 关键词: entanglement current correlation concurrence
• 年，卷（期）: 2010,（11）
• 页码范围: 90-95
• 页数: 6页
• 语种: 英文

摘要

The ground-state entanglement in a transverse spin-1/2 XX chain with a magnetization current is studied. By introducing a magnetization current to the system, a quantum phase transition to current-carrying phase may be presented with the variation of the driving field A for the magnetic field h > 1; and the ground-state entanglement arises simultaneously at the critical point of quantum phase transition. In our model, the introduction of magnetization current may result in more entanglement between any two nearest-neighbour spins.