Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 33: Quantum Information (Concepts and Methods) III
Q 33.5: Vortrag
Dienstag, 6. März 2018, 15:15–15:30, K 1.019
Quantum Properties of Daemonic Ergotropy — •Fabian Bernards1, Otfried Gühne1, Matthias Kleinmann1, and Mauro Paternostro2 — 1Universität Siegen, Siegen, Germany — 2Queen's University Belfast, United Kingdom
The emerging field of quantum thermodynamics tries to establish connections between thermodynamics and quantum mechanics. This connection brings up questions like 'How is the maximal extractable work from a quantum system related to its inherent classical and non-classical correlations?' or 'Can entanglement help us to develop better work extraction protocols?'. The maximal amount of extractable work from a system when maximizing over all possible unitary time evolutions is called ergotropy. If the system is correlated to an ancilla, the maximal amount of extractable work can on average be increased by performing measurements on the ancilla before extracting the work from the system. This increased amount of extractable work is then called daemonic ergotropy and the average gain from performing optimal measurements on the ancilla is the daemonic gain. In [G. Francica et al., NPJ Quantum Information 3,12 (2017)] a connection was established between the daemonic gain and measures of correlations in the system such as concurrence. Additionally, numerical results were presented for the two-qubit case. In our contribution, we are going to present applications of the concepts above on higher-dimensional and multi-partite systems.