TY - JOUR
T1 - Quantum simulation of thermodynamics in an integrated quantum photonic processor
AU - Somhorst, Frank
AU - van der Meer, Reinier
AU - Correa Anguita, Malaquias
AU - Schadow, Riko
AU - Snijders, Henk J.
AU - de Goede, M.
AU - Kassenberg, Ben
AU - Venderbosch, Pim
AU - Taballione, Caterina
AU - Epping, Jörn
AU - van den Vlekkert, Hans
AU - Timmerhuis, Jardi
AU - Bulmer, Jacob F. F.
AU - Lugani, Jasleen
AU - Walmsley, Ian A.
AU - Pinkse, Pepijn W.H.
AU - Eisert, Jens
AU - Walk, Nathan
AU - Renema, Jelmer Jan
N1 - Funding Information:
The Berlin team acknowledges funding from the BMBF (QPIC-1, PhoQuant), DFG (specifically EI 519/21-1 on paradigmatic quantum devices, but also CRC 183, project A03, on entangled states of matter, and FOR 2724 on quantum thermodynamics), the FQXi, the Einstein Foundation (Einstein Research Unit), the Munich Quantum Valley (K-8), and the Studienstiftung des Deutschen Volkes. It has also received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No. 817482 (PASQuanS, PASQuanS2) on programmable quantum simulators. The Twente team acknowledges funding from the Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO) via QuantERA QUOMPLEX (grant No. 680.91.037) and Veni (grant No. 15872). J.L. acknowledges funding from the European Research Council (QUCHIP, H2020-FETPROACT-2014). I.A.W. acknowledges funding from the European Research Council (Advanced Grant MOQUACINO), the Engineering and Physical Sciences Research Council (projects N509711, K034480, P510257, and T001062), and H2020 Marie–Sklodowska–Curie Actions (project 846073).
Publisher Copyright:
© 2023, The Author(s).
PY - 2023/12
Y1 - 2023/12
N2 - One of the core questions of quantum physics is how to reconcile the unitary evolution of quantum states, which is information-preserving and time-reversible, with evolution following the second law of thermodynamics, which, in general, is neither. The resolution to this paradox is to recognize that global unitary evolution of a multi-partite quantum state causes the state of local subsystems to evolve towards maximum-entropy states. In this work, we experimentally demonstrate this effect in linear quantum optics by simultaneously showing the convergence of local quantum states to a generalized Gibbs ensemble constituting a maximum-entropy state under precisely controlled conditions, while introducing an efficient certification method to demonstrate 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. Our results show the potential of photonic devices for quantum simulations involving non-Gaussian states.
AB - One of the core questions of quantum physics is how to reconcile the unitary evolution of quantum states, which is information-preserving and time-reversible, with evolution following the second law of thermodynamics, which, in general, is neither. The resolution to this paradox is to recognize that global unitary evolution of a multi-partite quantum state causes the state of local subsystems to evolve towards maximum-entropy states. In this work, we experimentally demonstrate this effect in linear quantum optics by simultaneously showing the convergence of local quantum states to a generalized Gibbs ensemble constituting a maximum-entropy state under precisely controlled conditions, while introducing an efficient certification method to demonstrate 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. Our results show the potential of photonic devices for quantum simulations involving non-Gaussian states.
U2 - 10.1038/s41467-023-38413-9
DO - 10.1038/s41467-023-38413-9
M3 - Article
SN - 2041-1723
VL - 14
JO - Nature communications
JF - Nature communications
M1 - 3895
ER -