Larmor Precession and Tunneling Time of a Non-Relativistic
Neutral Spin-1/2 Particle Through an Arbitrary Potential Barrier

Chin. Phys. Lett.

2002, Vol. 19

Issue (1): 10-13 DOI:

Original Articles

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

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LI Zhi-Jian, NIE Yi-Hang, LIANG Jiu-Qing et al 2002 Chin. Phys. Lett. 19 10-13

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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.

Keywords: 03.65.Xp 03.65.Ta

Published: 01 January 2002

PACS:	03.65.Xp	(Tunneling, traversal time, quantum Zeno dynamics)
	03.65.Ta	(Foundations of quantum mechanics; measurement theory)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2002/V19/I1/010

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	LI Zhi-Jian
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