Time of arrival in Classical and Quantum Mechanics

Details Time of arrival in Classical and Quantum Mechanics Time of arrival in Classical and Quantum Mechanics

2000-08-04

arxiv.org/abs/quant-ph/0008025v1

Physics

Quantum Physics

LaTeX article, 14 pages

Scientific paper

The time of arrival at an arbitrary position in configuration space can be given as a function of the phase space variables for the Liouville integrable systems of classical mechanics, but only for them. We review the Jacobi-Lie transformation that explicitly implements this function of positions and momenta. We then discuss the recently developed quantum formalism for the time of arrival. We first analyze the case of free particles in one and three space dimensions. Then, we apply the quantum version of the Jacobi-Lie transformation to work out the time of arrival operator in the presence of interactions. We discuss the formalism and its interpretation. We finish by disclosing the presence (absence) of "instantaneous" tunneling for thin (thick) barriers.

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