Larmor precession and dwell time of a particle scattered by a quantum well

✍ Scribed by Zhi-Jian Li; Jiu-Qing Liang; Qi-Wei Yan

• Book ID: 104428792
• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 203 KB
• Volume: 19
• Category: Article
• ISSN: 1386-9477
• DOI: 10.1016/s1386-9477(03)00380-1

✦ Synopsis

The Larmor precession of a neutral spin-1 2 particle in a uniform constant magnetic ÿeld conÿned to the region of a one-dimensional rectangular potential well is investigated. The spin precession serves as a clock to measure the time spent by a quantum particle dwelling at a potential well. With the help of a general spin coherent state it is explicitly shown that the spin precession time is equal to the dwell time. The comparison of the time in a potential well with that in free space shows apparent superluminality.