Journal of Computational Electronics

, Volume 14, Issue 4, pp 907–915

Wigner functions, signed particles, and the harmonic oscillator

Article

DOI: 10.1007/s10825-015-0722-0

Cite this article as:
Sellier, J.M. & Dimov, I. J Comput Electron (2015) 14: 907. doi:10.1007/s10825-015-0722-0

Abstract

In this paper, we introduce the simple harmonic oscillator and we address it in the Wigner formulation of quantum mechanics, therefore describing the whole problem in terms of quasi-distribution functions defined over the phase-space. The harmonic oscillator represents a very important problem as it provides exact solutions in both stationary and transient regimes. Subsequently, we outline the time-dependent signed particle Wigner Monte Carlo method and simulate the oscillator problem starting from stationary initial conditions, i.e. rotationally invariant functions in the phase-space, showing no evolution in time of the distribution function as expected. This work is, thus, twofold. On the one hand, one may see it as a short review effort to demonstrate the convenience of utilizing a phase-space approach in this particular context, suggesting that it could be the case again for different interesting problems. On the other hand, it represents a further opportunity to validate the signed particle Monte Carlo method, showing that a new reliable and powerful tool is available for the time-dependent simulation of quantum systems.

Keywords

Quantum mechanics Wigner formulation Monte Carlo methods Harmonic oscillator 

Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.IICT, Bulgarian Academy of SciencesSofiaBulgaria

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