Larmor precession and tunneling time of a relativistic neutral spinning particle through an arbitrary potential barrier

Details Larmor precession and tunneling time of a relativistic neutral spinning particle through an arbitrary potential barrier Larmor precession and tunneling time of a relativistic neutral spinning particle through an arbitrary potential barrier

2001-11-22

arxiv.org/abs/quant-ph/0111117v1

Physics

Quantum Physics

10 pages, 1 figure. To be published in Phys. Rev. A (01 February 2002)

Scientific paper

10.1103/PhysRevA.65.024101

The Larmor precession of a relativistic neutral spin-1/2 particle in a uniform constant magnetic field confined to the region of a one-dimensional arbitrary potential barrier is investigated. The spin precession serves as a clock to measure the time spent by a quantum particle traversing a potential barrier. With the help of general spin coherent state it is explicitly shown that the precession time is equal to the dwell time.

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