Multipartite entanglement in the interaction system between a single-mode microwave cavity field and superconducting charge qubits |
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| Authors: | Shi Zhen-Gang Chen Xiong-Wen Zhu Xi-Xiang and Song Ke-Hui |
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| Affiliation: | Department of Physics and Electronic Information Science, Huaihua University, Huaihua 418008, China Research Institute of Information Science, Huaihua University, Huaihua 418008, China |
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| Abstract: | 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. |
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| Keywords: | superconducting charge qubits standing wave cavity Schrodinger cat states superpositions of mesoscopic quantum states |
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