Rostock 2019 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 42: Poster: Quantum Optics and Photonics II

Q 42.32: Poster

Mittwoch, 13. März 2019, 16:15–18:15, S Atrium Informatik

Sympathetic Cooling of Quantum Simulators — •Meghana Raghunandan¹, Fabian Wolf², Christian Ospelkaus^2,3, Piet O. Schmidt^2,3, and Hendrik Weimer¹ — ¹Institut für Theoretische Physik, Leibniz Universität Hannover, Germany — ²QUEST Institut, Physikalisch-Technische Bundesanstalt, Braunschweig, Germany — ³Institut für Quantenoptik, Leibniz Universität Hannover, Germany

We discuss the possibility of maximizing the cooling of a quantum simulator by controlling the system-environment coupling such that the system is driven into the ground state. We numerically solve the quantum master equation for Ising and Heisenberg chains consisting of N spins coupled to a radiation field. We maximize the cooling by finding the dependence of the effective rate of transitions of the various excited states into the ground state. We show that adding a single dissipative qubit already results in efficient cooling which is robust against decoherences.