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Spin Switch and Qubit Register from a Spin Particle Controlled by a Time-Dependent Magnetic Field |
WANG Shun-Jin1,2;JIA Cheng-Long2;AN Jun-Hong2;LUO Hong-Gang2,3 |
1Department of Physics, Sichuan University, Chengdu 610064
2Department of Modern Physics, Lanzhou University, Lanzhou 730000
31Institute of Theoretical Physics, Chinese Academy of Sciences,Beijing 100080 |
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Cite this article: |
WANG Shun-Jin, JIA Cheng-Long, AN Jun-Hong et al 2004 Chin. Phys. Lett. 21 778-781 |
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Abstract A spin particle subjected to any time-dependent magnetic field is investigated in detail at different magnetic field configurations. Spin flip probability, spin alignment, cyclic and noncyclic nonadiabatic geometric phases are calculated exactly and their analytical expressions are presented. Our theoretical study shows that a spin particle controlled by a resonant time-dependent magnetic field can be used as efficient controllable devices of spin switch or qubit register.
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Keywords:
03.67.Lx
03.65.Fd
03.65.Vf
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Published: 01 May 2004
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PACS: |
03.67.Lx
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(Quantum computation architectures and implementations)
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03.65.Fd
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(Algebraic methods)
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03.65.Vf
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(Phases: geometric; dynamic or topological)
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