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
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
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.
WANG Shun-Jin;JIA Cheng-Long;AN Jun-Hong;LUO Hong-Gang;. Spin Switch and Qubit Register from a Spin Particle Controlled by a Time-Dependent Magnetic Field[J]. 中国物理快报, 2004, 21(5): 778-781.
WANG Shun-Jin, JIA Cheng-Long, AN Jun-Hong, LUO Hong-Gang,. Spin Switch and Qubit Register from a Spin Particle Controlled by a Time-Dependent Magnetic Field. Chin. Phys. Lett., 2004, 21(5): 778-781.
2004, Vol. 21 
