Quantum mechanics and classical trajectories

Details Quantum mechanics and classical trajectories Quantum mechanics and classical trajectories

2010-05-20

arxiv.org/abs/1005.3786v2

Physics

Mathematical Physics

8 pages; v2 representation improved

Scientific paper

The classical limit $\hbar$->0 of quantum mechanics is known to be delicate, in particular there seems to be no simple derivation of the classical Hamilton equation, starting from the Schr\"odinger equation. In this paper I elaborate on an idea of M. Reuter to represent wave functions by parallel sections of a flat vector bundle over phase space, using the connection of Fedosov's construction of deformation quantization. This generalizes the ordinary Schr\"odinger representation, and allows naturally for a description of quantum states in terms of a curve plus a wave function. Hamilton's equation arises in this context as a condition on the curve, ensuring the dynamics to split into a classical and a quantum part.

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