Larmor Precession and Tunneling Time of a Non-Relativistic
Neutral Spin-1/2 Particle Through an Arbitrary Potential Barrier
LI Zhi-Jian1, NIE Yi-Hang1, LIANG Jiu-Qing1, YAN Qi-Wei2
1Institute of Theoretical Physics, Shanxi University, Taiyuan 030006
2State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100080
Larmor Precession and Tunneling Time of a Non-Relativistic
Neutral Spin-1/2 Particle Through an Arbitrary Potential Barrier
LI Zhi-Jian1;NIE Yi-Hang1;LIANG Jiu-Qing1;YAN Qi-Wei2
1Institute of Theoretical Physics, Shanxi University, Taiyuan 030006
2State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100080
Abstract： We investigate the Larmor precession of a non-relativistic neutral spin-1/2 particle in a uniform constant magnetic field confined to the region of a one-dimensional arbitrary potential barrier. With the help of a general spin coherent state it is explicitly shown that the spin precession time is equal to the dwell time. For the special case of symmetric rectangular potential barrier, the precession time is also in agreement with the transmission time. We present a numerical estimation of the precession time showing an apparent superluminal tunneling.
(Foundations of quantum mechanics; measurement theory)
引用本文:
LI Zhi-Jian;NIE Yi-Hang;LIANG Jiu-Qing;YAN Qi-Wei. Larmor Precession and Tunneling Time of a Non-Relativistic
Neutral Spin-1/2 Particle Through an Arbitrary Potential Barrier[J]. 中国物理快报, 2002, 19(1): 10-13.
LI Zhi-Jian, NIE Yi-Hang, LIANG Jiu-Qing, YAN Qi-Wei. Larmor Precession and Tunneling Time of a Non-Relativistic
Neutral Spin-1/2 Particle Through an Arbitrary Potential Barrier. Chin. Phys. Lett., 2002, 19(1): 10-13.
2002, Vol. 19 
