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Q: Fachverband Quantenoptik und Photonik

Q 50: Quantum Information (Concepts and Methods) IV

Q 50.1: Hauptvortrag

Donnerstag, 14. März 2019, 14:00–14:30, S HS 001 Chemie

Quantum technologies enabled by dissipation — •Hendrik Weimer — Institut für Theoretische Physik, Leibniz Universität Hannover

I will present two examples where adding dissipation channels to a quantum-many body system allows to realize quantum devices that have substantial advantages compared to their purely coherent counterparts. First, I will show how a fundamental understanding of a dissipative phase transition [1] creates the possibility to build a quantum sensor with extraordinary properties [2]. As the second example, I will present a sympathetic cooling scheme for quantum simulators that allows for an efficient preparation of low-energy states of largely arbitrary Hamiltonians. These findings underline that dissipation in quantum systems is not always a nuisance, but is a powerful tool to enable future quantum technologies.

[1] H. Weimer, Phys. Rev. Lett. 114, 040402 (2015).

[2] M. Raghunandan, J. Wrachtrup, H. Weimer, Phys. Rev. Lett. 120, 150501 (2018).