Quantum logic gates operation using SQUID qubits in bimodal cavity |
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Authors: | Song Ke-Hui |
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Institution: | Department of Physics and Electronic Information Science, Huaihua University, Huaihua 418008, China; Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 23026, China |
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Abstract: | We present a scheme to realize the basic two-qubit logic gates such as the
quantum phase gate and SWAP gate using a detuned microwave cavity
interacting with three-level superconducting-quantum-interference-device
(SQUID) qubit(s), by placing SQUID(s) in a two-mode microwave cavity and
using adiabatic passage methods. In this scheme, the two logical states of
the qubit are represented by the two lowest levels of the SQUID, and the
cavity fields are treated as quantized. Compared with the previous method,
the complex procedures of adjusting the level spacing of the SQUID and
applying the resonant microwave pulse to the SQUID to create transformation
are not required. Based on superconducting device with relatively long
decoherence time and simplified operation procedure, the gates operate
at a high speed, which is important in view of decoherence. |
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Keywords: | superconducting-quantum-interference-device bimodal cavity adiabatic passage quantum logic gate |
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