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Physics Letters A

Efficient scheme to produce multi-particle entanglement with superconducting charge qubits

Lian Hu

Published Feb 7, 2006• 1 citation
Publisher
DOI
10.1016/j.physleta.2006.01.074

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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.