Multipartite entanglement in the interaction system between a single-mode microwave cavity field and superconducting charge qubits

• 来源期刊: 中国物理（英文版）
• 关键词: superconducting charge qubits standing wave cavity Schrddinger cat states,superpositions of mesoscopic quantum states
• 年，卷（期）: 2007,（6）
• 页码范围: 1615-1618
• 页数: 4页
• 语种: 英文

摘要

This paper proposes a method of generating multipartite entanglement through using d. c. superconducting quantum interference devices (SQUID) inside a standing wave cavity. In this scheme, the d. c. SQUID works in the charge region. It is shown that, a large number of important multipartite entangled states can be generated by a controllable interaction between a cavity field and qubits. It is even possible to produce entangled states involving different cavity modes based on the measurement of charge qubits states. After such superpositions states are created, the interaction can be switched off by the classical magnetic field through the SQUID, and there is no information transfer between the cavity field and the charge qubits.