Rostock 2019 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 56: Quantum Optics III

Q 56.4: Talk

Thursday, March 14, 2019, 15:00–15:15, S Ex 04 E-Tech

Driven dissipative quantum dynamics in spin coherent state representation — •Konrad Merkel, Valentin Link, and Kimmo Luoma — Technische Universität Dresden, 01069 Dresden, GERMANY

Driven dissipative many body quantum systems are becoming experimentally available but they are demanding to analyze theoretically due to large system size and lack of detailed balance. Typical model systems consist of large numbers of spins coupled to an environment, effectively modeled by a Gorini-Kossakowski-Sudarshan-Lindblad (GKSL) master equation. We investigate the dynamics of such an open quantum system in phase space utilizing spin coherent states. In this representation the complexity of the problem becomes independent of the system size. Moreover, we are able to find parameter regions, where the GKSL master equation is mapped to a proper Fokker-Planck equation with positive diffusion. The problem can then be solved efficiently using stochastic differential equations.