An Aharonov-Anandan phase gate in the sub-Hilbert space of a coupling flux qubits system |
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Authors: | Zheng Guo-Lin Deng Hui Wu Yu-Lin Wang Xin-Qiang Chen Ying-Fei Zheng Dong-Ning |
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Affiliation: | [1]College of physics, Chongqing University, Chongqing 400044, China [2]Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China |
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Abstract: | We study two flux qubits with a parameter coupling scenario. Under the rotating wave approximation, we truncate the 4-dimensional Hilbert space of a coupling flux qubits system to a 2-dimensional subspace spanned by two dressed states |01 and |10 . In this subspace, we illustrate how to generate an Aharnov–Anandan phase, based on which, we can construct a NOT gate (as effective as a C-NOT gate) in this coupling flux qubits system. Finally, the fidelity of the NOT gate is also calculated in the presence of the simulated classical noise. |
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Keywords: | Aharonov Anandan phase sub-Hilbert space coupling flux qubits |
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