Mainz 2017 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 20: Poster Session I

A 20.2: Poster

Dienstag, 7. März 2017, 17:00–19:00, P OG1

Disspative processes in interacting bosonic systems — •Arya Dhar, Andreas Geißler, Tao Qin, and Walter Hofstetter — Institut für Theoretische Physik, Goethe-Universität, 60438 Frankfurt am Main, Germany

Rydberg atoms in recent years have emerged as an efficient tool to engineer long-range interactions and simulate a variety of spin Hamiltonians. Off-resonant coupling to Rydberg states creates 'Rydberg dressing' leading to great flexibility of tuning the interaction strengths. The interplay between the kinetic energy and the interactions gives rise to a number of novel quantum phases in the equilibrium scenario such as the Devil's staircase, and supersolid phases [A. Geißler et al., arXiv:1509.06292]. But in realistic situations in the experiment, there are always dissipative processes present such as spontaneous emission from the excited Rydberg states or intermediate states and dephasing due to black-body radiation. In this work we demonstrate progress on the development of a novel numerical method to study dissipative effects in Rydberg-dressed many-body systems. The goal is to combine dynamical mean field theory (DMFT) with the Lindblad formalism using the auxiliary master equation approach proposed recently [I. Titvinidze et al, Phys. Rev. B 92 , 245125 (2015)]. Using this method, we study the effects of dissipation on the various ordered states already predicted in the equilibrium case. Our studies are relevant for current experiments, which can also control the different dissipation processes to some degree.