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QI: Fachverband Quanteninformation

QI 4: Quantum Thermodynamics and Open Quantum Systems

QI 4.5: Vortrag

Dienstag, 21. September 2021, 15:15–15:30, H3

Entanglement and work fluctuations in composite quantum systems — •Satoya Imai, Otfried Gühne, and Stefan Nimmrichter — Universität Siegen Department Physik Emmy-Noether-Campus Walter-Flex-Straße 3 57068 Siegen Germany

We investigate the role of quantum correlations in the thermodynamics of composite quantum systems by comparing the work cost of unitary operations for separable and entangled states. In a limited control scenario, quantum correlations between interacting, high-dimensional two-particle systems can be characterized by monitoring the average energy change and its fluctuations due to random local or global unitary operations. These operations can represent isentropic strokes as part of a thermodynamic protocol. We derive a hierarchy of bounds based on the Schmidt rank of the quantum state and thereby show that higher work fluctuations can verify the presence of stronger entanglement in the system.