Mainz 2017 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 40: Ultracold Atoms II (with Q)

A 40.8: Vortrag

Freitag, 10. März 2017, 16:15–16:30, P 104

Sympathetic cooling of quantum simulators — •Meghana Raghunandan and Hendrik Weimer — Institut für Theoretische Physik, Leibniz Universität Hannover

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 make use of various analytical tools such as effective operator formalism [1] and the quantum master equations to exactly solve the model of an Ising spin chain consisting of N particles 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 by adding a single dissipative qubit, we already get quite substantial cooling rates.

[1] Effective operator formalism for open quantum systems. Phys. Rev. A 85, 032111