一维复合势垒中的Larmor钟

利用Larmor钟方法计算了一维复合势垒系统中的隧穿时间．从计算结果，对由Larmor钟所定义的Larmor时间在复合势垒中的有效性、可加性，以及它们与透射时间τ_T、反射时间τ_R、逗留时间τ_D的关系作了讨论．6个Larmor时间中，τ_xT,τ_xR,τ_yT和τ_yR都不是有效的时间量，它们不能为隧穿时间提供有效的描述，只有τ_yT和τ_yR满足可加性和判据τ_D＝Tτ_yT+Rτ_yR，它们最有可能给出透射时间τ_T、反射时间τ_R．τ_yT,τ_yR与势垒的对称性有关，等式τ_yT＝τ_yR是否成立与势垒是否对称有关． 关键词：

LARMOR CLOCK IN ONE-DIMENSIONAL COMBINED POTENTIAL

In this paper, with the use of Larmor clock, the tunneling times of one-dimensional combined potential are calculated. According to the results, the characters of Larmor times which are defined by Larmor clock method are discussed. It was found that the equality τ_yT=τ_yR=τ_D does not hold in general. Whether the equality τ_yT=τ_yR holds is determined by the symmetry of the potential. The Larmor times τ_yT and τ_yR may offer definition for transmitted time τ_T and reflected time τ_R, but τ_xT,τ_xR,τ_yT and τ_yR cannot. In addition, τ_yT and τ_yR can satisfy the equality τ_D=Tτ_yT+Rτ_yR.