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Decoherence-free spin entanglement generation and purification in nanowire double quantum dots |
| Peng Xue(薛鹏)† |
| Department of Physics, Southeast University, Nanjing 211189, China |
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Abstract We propose a deterministic generation and purification of decoherence-free spin entangled states with singlet-triplet spins in nanowire double quantum dots via resonator-assisted charge manipulation and measurement techniques. Each spin qubit corresponds to two electrons in a double quantum dot in the nanowire, with the singlet and one of the triplets as the decoherence-free qubit states. The logical qubits are immunized against the dominant source of decoherence-dephasing—while the influences of additional errors are shown by numerical simulations. We analyse the performance and stability of all required operations and emphasize that all techniques are feasible in current experimental conditions.
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Received: 10 March 2011
Revised: 22 April 2011
Accepted manuscript online:
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PACS:
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03.67.Lx
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(Quantum computation architectures and implementations)
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42.50.Pq
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(Cavity quantum electrodynamics; micromasers)
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73.21.La
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(Quantum dots)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11004029), the Natural Science Foundation of Jiangsu Province, China (Grant No. BK2010422), the Ph. D. Program Foundation of the Ministry of Education of China, the Excellent Young Teachers Program of Southeast University, and the National Basic Research Development Program of China (Grant No. 2011CB921203). |
Cite this article:
Peng Xue(薛鹏) Decoherence-free spin entanglement generation and purification in nanowire double quantum dots 2011 Chin. Phys. B 20 100310
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