Hannover 2020 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 29: Quantum Effects (Entanglement and Decoherence)

Q 29.1: Vortrag

Mittwoch, 11. März 2020, 11:00–11:15, f442

Simulating open quantum systems using quantum Zeno dynamics — •Sabrina Patsch1,2, Sabrina Maniscalco3, and Christiane P. Koch1,21Theoretische Physik, Universität Kassel, Germany — 2Theoretische Physik, Freie Universität Berlin, Germany — 3Turku Centre for Quantum Physics, University of Turku, Finland

Quantum simulation is most prominently used to study many-body systems which overtax even the most powerful computers, but quantum simulation is a useful tool to understand complex quantum systems of various types. Here, we present a quantum simulator which is apt to study the role of memory effects in the dynamics of open quantum systems [1]. Instead of investigating the influence of a given environment on a quantum system, we use measurements to induce dissipation in the first place. In the limit of a continuous or very strong measurement, the system’s dynamics get confined to a subspace of selectable size – we observe quantum Zeno dynamics. Moreover, we can tune the non-Markovianity, i.e. the information backflow from the environment to the system, and engineer essentially arbitrary Markovian dynamics. Due to the simplicity of our scheme it can be implemented in many experimental platforms, one example being cavity QED [2]. Our quantum simulator opens the path to experimentally study memory effects, dissipation and their interplay in a controlled way – a matter of major importance since open quantum systems are ubiquitous and thus a crucial player in the pursuit of quantum technologies.

[1] Patsch, Maniscalco, Koch, arXiv:1906.11492 (2019)
[2] Raimond, et. al., PRA 86, 032120 (2012)

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