Ground-state entanglement in a three-spin transverse Ising model with energy current

• 来源期刊: 中国物理（英文版）
• 关键词: entanglement energy current quantum phase transitio
• 年，卷（期）: 2007,（2）
• 页码范围: 324-328
• 页数: 5页
• 语种: 英文

摘要

The ground-state entanglement associated with a three-spin transverse Ising model is studied. By introducing an energy current into the system, a quantum phase transition to energy-current phase may be presented with the variation of external magnetic field; and the ground-state entanglement varies suddenly at the critical point of quantum phase transition. In our model, the introduction of energy current makes the entanglement between any two qubits become maximally robust.