Phase-space approach to solving the time-independent Schrödinger equation

Asaf Shimshovitz, David J. Tannor

Research output: Contribution to journalArticlepeer-review

Abstract

We propose a method for solving the time-independent Schrödinger equation based on the von Neumann (vN) lattice of phase space Gaussians. By incorporating periodic boundary conditions into the vN lattice, we solve a longstanding problem of convergence of the vN method. This opens the door to tailoring quantum calculations to the underlying classical phase space structure while retaining the accuracy of the Fourier grid basis. The method has the potential to provide enormous numerical savings as the dimensionality increases. In the classical limit, the method reaches the remarkable efficiency of one basis function per one eigenstate. We illustrate the method for a challenging two-dimensional potential where the Fourier grid method breaks down.

Original languageEnglish
Article number070402
JournalPhysical review letters
Volume109
Issue number7
DOIs
StatePublished - 17 Aug 2012

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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