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QI: Fachverband Quanteninformation

QI 22: Quantum Simulation I

QI 22.10: Vortrag

Donnerstag, 21. März 2024, 12:15–12:30, HFT-FT 101

Quantum simulation of thermodynamics in an integrated quantum photonic processorFrank Somhorst1, Reineer van der Meer1, Malaquias Correa Anguita1, Riko Schadow2, Henk Snijders3, Michiel de Goede3, Ben Kassenberg3, Pim Venderbosch3, Caterina Taballione3, Jorn Epping3, Hans van der Vlekkert3, Jardi Timmerhuis3, Jacob Bulmer4, Jasleen Lugani5, Ian Walmsley6,7, Pepijn Pinske1, Jens Eisert2,8,9, •Nathan Walk2, and Jelmer Renema11University of Twente — 2Freie Universität Berlin — 3QuiX Quantum B.V. — 4University of Bristol — 5IIT Delhi — 6Imperial College London — 7University of Oxford — 8Helmholtz-Zentrum Berlin für Materialien und Energie — 9Fraunhofer Heinrich Hertz Institute

A core questions of quantum physics is how to reconcile the unitary evolution, which is information-preserving and time-reversible, with evolution following the second law of thermodynamics, which, in general, is neither. The resolution is to recognize that global unitary evolution of a multi-partite quantum state can generate entanglement and cause the local subsystems to evolve towards maximum-entropy states. We experimentally demonstrate this effect in linear quantum optics by simultaneously showing the convergence of local quantum states to a generalized Gibbs ensemble, while introducing an efficient certification method to show that the state retains global purity. Our quantum states are manipulated by a programmable integrated quantum photonic processor, which simulates arbitrary non-interacting Hamiltonians, demonstrating the universality of this phenomenon.

Keywords: Certification and Benchmarking; Photons; Thermodynamics; Equilibration; NISQ

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