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Chinese Physics Letters

Implementation of a Controlled-NOT Gate Using Superconducting Quantum Interference Devices

Chi Ma, Zhang Shi-jun, Juan He, Liu Ye

Published Feb 1, 2008• 2 citations
Publisher

Abstract

A scheme is proposed for implementing a controlled-NOT gate via superconducting quantum interference device (SQUID) in cavity-QED. The controlled-NOT gate can be achieved by coupling the SQUID to a single-mode microwave cavity field or classical microwave pluses. The scheme may be experimentally realizable.
DOI
10.1088/0256-307x/25/2/009

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We present a scheme to achieve maximally entangled states, controlled phase-shift gate, and SWAP gate for two superconducting-quantum-interference-device (SQUID) qubits, by placing SQUIDs in a microwave cavity. We also show how to transfer quantum information from one SQUID qubit to another. In this scheme, no transfer of quantum information between the SQUIDs and the cavity is required, the cavity field is only virtually excited and thus the requirement on the quality factor of the cavity is greatly relaxed.
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