Numerical evaluation of two-time correlation functions in open quantum systems with matrix product state methods: a comparison
Stefan Wolff, Ameneh Sheikhan, Corinna Kollath
SciPost Phys. Core 3, 010 (2020) · published 6 November 2020
- doi: 10.21468/SciPostPhysCore.3.2.010
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Abstract
We compare the efficiency of different matrix product state (MPS) based methods for the calculation of two-time correlation functions in open quantum systems. The methods are the purification approach [1] and two approaches [2,3] based on the Monte-Carlo wave function (MCWF) sampling of stochastic quantum trajectories using MPS techniques. We consider a XXZ spin chain either exposed to dephasing noise or to a dissipative local spin flip. We find that the preference for one of the approaches in terms of numerical efficiency depends strongly on the specific form of dissipation.
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Authors / Affiliation: mappings to Contributors and Organizations
See all Organizations.- 1 Stefan Wolff,
- 1 Ameneh Sheikhan,
- 1 Corinna Kollath
Funders for the research work leading to this publication