Decoherence-free spin entanglement generation and purification in nanowire double quantum dots

doi:10.1088/1674-1056/20/10/100310

中国物理B ›› 2011, Vol. 20 ›› Issue (10): 100310-100310.doi: 10.1088/1674-1056/20/10/100310

Decoherence-free spin entanglement generation and purification in nanowire double quantum dots

薛鹏

Department of Physics, Southeast University, Nanjing 211189, China

收稿日期:2011-03-10 修回日期:2011-04-22 出版日期:2011-10-15 发布日期:2011-10-15
基金资助:
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).

Decoherence-free spin entanglement generation and purification in nanowire double quantum dots

Peng Xue(薛鹏)^†

Department of Physics, Southeast University, Nanjing 211189, China

Received:2011-03-10 Revised:2011-04-22 Online:2011-10-15 Published:2011-10-15
Supported by:
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).

摘要/Abstract

摘要： 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.

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.

Key words: decoherence-free, entanglement, nanowire quantum dot, spin qubit

中图分类号: (Quantum computation architectures and implementations)

03.67.Lx

42.50.Pq (Cavity quantum electrodynamics; micromasers) 73.21.La (Quantum dots)

薛鹏. Decoherence-free spin entanglement generation and purification in nanowire double quantum dots[J]. 中国物理B, 2011, 20(10): 100310-100310.

Peng Xue(薛鹏) . Decoherence-free spin entanglement generation and purification in nanowire double quantum dots[J]. Chin. Phys. B, 2011, 20(10): 100310-100310.

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Decoherence-free spin entanglement generation and purification in nanowire double quantum dots

Decoherence-free spin entanglement generation and purification in nanowire double quantum dots

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