Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1994-09-21
Annals Phys. 241 (1995) 79-127
Physics
High Energy Physics
High Energy Physics - Theory
50, MANIT-94-01
Scientific paper
The Moyal--Weyl description of quantum mechanics provides a comprehensive phase space representation of dynamics. The Weyl symbol image of the Heisenberg picture evolution operator is regular in $\hbar$. Its semiclassical expansion `coefficients,' acting on symbols that represent observables, are simple, globally defined differential operators constructed in terms of the classical flow. Two methods of constructing this expansion are discussed. The first introduces a cluster-graph expansion for the symbol of an exponentiated operator, which extends Groenewold's formula for the Weyl product of symbols. This Poisson bracket based cluster expansion determines the Jacobi equations for the semiclassical expansion of `quantum trajectories.' Their Green function solutions construct the regular $\hbar\downarrow0$ asymptotic series for the Heisenberg--Weyl evolution map. The second method directly substitutes such a series into the Moyal equation of motion and determines the $\hbar$ coefficients recursively. The Heisenberg--Weyl description of evolution involves no essential singularity in $\hbar$, no Hamilton--Jacobi equation to solve for the action, and no multiple trajectories, caustics or Maslov indices.
Molzahn F. H.
Osborn T. A.
No associations
LandOfFree
Moyal Quantum Mechanics: The Semiclassical Heisenberg Dynamics does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Moyal Quantum Mechanics: The Semiclassical Heisenberg Dynamics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Moyal Quantum Mechanics: The Semiclassical Heisenberg Dynamics will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-635551