Numerical Path Integral Approach to Quantum Dynamics and Stationary Quantum States. (3rd July 2015)

• Record Type: Journal Article
• Authors: Ruokosenmäki, Ilkka; Rantala, Tapio T.
• Is Part Of: Communications in computational physics. Volume 18:Number 1(2015:Jul.)
• Page Start: 91
• Page End: 103
• Publication Date: 2015-07-03
• Subjects: Mathematical physics -- Data processing -- Periodicals; Physics -- Data processing -- Periodicals; 530.150285
• DOI: 10.4208/cicp.180914.161214a
• Languages: English
• ISSNs: 1815-2406

Abstract

<abstract abstract-type="normal"> <title>Abstract</title> <p>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.</p> </abstract>