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Numerical Path Integral Approach to Quantum Dynamics and Stationary Quantum States

Published online by Cambridge University Press:  03 July 2015

Ilkka Ruokosenmäki
Affiliation:
Department of Physics, Tampere University of Technology, Finland
Tapio T. Rantala*
Affiliation:
Department of Physics, Tampere University of Technology, Finland
*
*Corresponding author. Email addresses: Ilkka.Ruokosenmaki@tut.fi (I. Ruokosenmäki), Tapio.Rantala@tut.fi (T. T. Rantala)
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Abstract

Applicability of Feynman path integral approach to numerical simulations of quantum dynamics of an electron in real time domain is examined. Coherent quantum dynamics is demonstrated with one dimensional test cases (quantum dot models) and performance of the Trotter kernel as compared with the exact kernels is tested. Also, a novel approach for finding the ground state and other stationary sates is presented. This is based on the incoherent propagation in real time. For both approaches the Monte Carlo grid and sampling are tested and compared with regular grids and sampling. We asses the numerical prerequisites for all of the above.

Type
Research Article
Copyright
Copyright © Global-Science Press 2015 

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