Physics – Quantum Physics
Scientific paper
2001-11-22
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.
Kobe Donald H.
Li Zhi-Jian
Liang Jiu--Qing
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