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A: Fachverband Atomphysik

A 43: Cold atoms VII - micromachines (joint session A/Q)

A 43.2: Vortrag

Freitag, 9. März 2018, 10:50–11:05, K 0.011

Unifying paradigms of quantum refrigeration: how resource-control determines fundamental limits — •Fabien Clivaz¹, Ralph Silva¹, Géraldine Haack¹, Jonatan Bohr Brask¹, Nicolas Brunner¹, and Marcus Huber² — ¹Department of Applied Physics, University of Geneva, 1211 Geneva 4, Switzerland — ²Institute for Quantum Optics and Quantum Information (IQOQI), Austrian Academy of Sciences, Boltzmanngasse 3, A-1090 Vienna, Austria

In classical thermodynamics the work cost of control can typically be neglected. On the contrary, in quantum thermodynamics the cost of control constitutes a fundamental contribution to the total work cost. Evaluating this contribution is an important but non-trivial problem. Here, focusing on quantum refrigeration, we show how the level of control determines the fundamental limits to cooling. We compare coherent versus incoherent operations, and derive the minimal achievable temperature and associated work cost. We discuss both the single-shot and asymptotic regimes. Our work provides a unified picture of the different approaches to quantum refrigeration developed in the literature, including algorithmic cooling, autonomous quantum refrigerators, and the resource theory of quantum thermodynamics.