Probability density in the complex plane

作者：Bender Carl M; Hook Daniel W^*; Meisinger Peter N; Wang Qing hai

来源：Annals of Physics, 2010, 325(11): 2332-2362.

DOI：10.1016/j.aop.2010.02.011

• Correspondence principle
• PT Symmetry
• Hyperasymptotics

The correspondence principle asserts that quantum mechanics resembles classical mechanics in the high-quantum-number limit. In the past few years, many papers have been published on the extension of both quantum mechanics and classical mechanics into the complex domain. However, the question of whether complex quantum mechanics resembles complex classical mechanics at high energy has not yet been studied. This paper introduces the concept of a local quantum probability density rho(z) in the complex plane. It is shown that there exist infinitely many complex contours C of infinite length on which rho(z)dz is real and positive. Furthermore, the probability integral integral(c) rho(z) dz is finite. Demonstrating the existence of such contours is the essential element in establishing the correspondence between complex quantum and classical mechanics. The mathematics needed to analyze these contours is subtle and involves the use of asymptotics beyond all orders.

• 出版日期2010-11