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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 processor — Frank 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 Walmsley^6,7, Pepijn Pinske¹, Jens Eisert^2,8,9, •Nathan Walk², and Jelmer Renema¹ — ¹University 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