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Probability and complex quantum trajectories
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DOI：10.1016/j.aop.2008.09.007.png)
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摘要
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It is shown that in the complex trajectory representation of quantum mechanics, the Born's Psi*Psi probability density can be obtained from the imaginary part of the velocity held of particles on the real axis. Extending this probability axiom to the complex plane, we first attempt to find a probability density by solving an appropriate conservation equation. The characteristic curves of this conservation equation are found to be the same as the complex paths of particles in the new representation. The boundary condition in this case is that the extended probability density should agree with the quantum probability rule along the real line. For the simple, time-independent, one-dimensional problems worked out here, we find that a conserved probability density can be derived from the velocity field of particles, except in regions where the trajectories were previously suspected to be nonviable. An alternative method to find this probability density in terms of a trajectory integral, which is easier to implement on a computer and useful for single particle solutions, is also presented. Most importantly, we show, by using the complex extension of Schrodinger equation, that the desired conservation equation can be derived from this definition of probability density. (C) 2008 Elsevier Inc. All rights reserved.
Keyword:
Quantum Hamilton-Jacobi equation
Trajectory representation
Probability axiom
Complex methods
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1.8W
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Equivalence principle, Planck length and quantum Hamilton-Jacobi equation等价原理、普朗克长度和量子hamilton-jacobi方程.png)
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