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Q: Fachverband Quantenoptik und Photonik
Q 17: Quantum Information I
Q 17.8: Vortrag
Dienstag, 12. März 2024, 12:45–13:00, HS 1199
Demonstration of entanglement-enabled work extraction — Alexander Stahl1, Michael Kewming2, John Goold2, Daniel Pijn1, Ulrich Poschinger1, and •Ferdinand Schmidt-Kaler1 — 1Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany — 2Department of Physics, Trinity College Dublin, Dublin 2, Ireland
Trapped ion quantum computers provide an ideal platform for experimental studies in the field of quantum thermodynamics. We experimentally realize a work extraction protocol, converting entanglement into classical correlation and then into work. In this protocol, a ’demon’ has access to an entangled ressource state shared with an ’agent’. The agent has only local access, such that this ressource appears to be thermal. By a sequence of manipulations, the demon can betray the agent and use information gained about the agents state to extract work. We show how this corroborates the work extraction protocol proposed in [1] and that the maximum work extraction is indeed bound by the concurrence as δ W/EC2/2. To enable the implementation of the protocol, the measurement outcome of qubits has to be used for a classical decision logic, such that a coherent feedforward for the following operations can be realized. Specifically, in the shuttling based trapped ion quantum computer this requires the capability to decide on a µs-timescale about future ion transports and laser pulses to execute.
[1] G. Francica, J. Goold, F. Plastina, and M. Paternostro, npj Quantum Information 3 (2017)
Keywords: Quantum thermodynamics; Work extraction; Trapped ions; Shuttling; Coherent feedback