Quantum Hamilton-Jacobi Theory

Details Quantum Hamilton-Jacobi Theory Quantum Hamilton-Jacobi Theory

2007-12-03

arxiv.org/abs/0712.0307v1

Phys. Rev. Lett. 99, 170406 (2007)

Physics

Quantum Physics

7 pages

Scientific paper

10.1103/PhysRevLett.99.170406

Quantum canonical transformations have attracted interest since the beginning of quantum theory. Based on their classical analogues, one would expect them to provide a powerful quantum tool. However, the difficulty of solving a nonlinear operator partial differential equation such as the quantum Hamilton-Jacobi equation (QHJE) has hindered progress along this otherwise promising avenue. We overcome this difficulty. We show that solutions to the QHJE can be constructed by a simple prescription starting from the propagator of the associated Schroedinger equation. Our result opens the possibility of practical use of quantum Hamilton-Jacobi theory. As an application we develop a surprising relation between operator ordering and the density of paths around a semiclassical trajectory.

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