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Quantum information processing and multi-qubit entanglement with Josephson-junction charge qubits in a thermal cavity

Research paper by xubo zou

Indexed on: 10 Jun '03Published on: 10 Jun '03Published in: Physics - Mesoscopic Systems and Quantum Hall Effect



Abstract

We propose a scheme to implement the two-qubit quantum phase gate with Josephson-junction charge qubits in a thermal cavity. In this scheme, the photon-number-dependent parts in the time evolution operator are canceled at the special time. Thus the scheme is insensitive to the thermal field. We also demonstrate that the scheme can be used to generate maximally entangled state of many Josephson-junction charge qubits