Experimentally probing Landauer's principle in the quantum many-body regime

• URL: http://arxiv.org/abs/2407.21690v1
• Date: Wed, 31 Jul 2024 15:37:06 GMT
• Title: Experimentally probing Landauer's principle in the quantum many-body regime
• Authors: Stefan Aimet, Mohammadamin Tajik, Gabrielle Tournaire, Philipp Schüttelkopf, João Sabino, Spyros Sotiriadis, Giacomo Guarnieri, Jörg Schmiedmayer, Jens Eisert,
• Abstract summary: We experimentally probe Landauer's principle in the quantum many-body regime using a quantum field simulator of ultracold Bose gases. Our results agree with theoretical predictions, interpreted using a semi-classical quasiparticle picture.
• Score: 0.2321794817688276
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Landauer's principle bridges information theory and thermodynamics by linking the entropy change of a system during a process to the average energy dissipated to its environment. Although typically discussed in the context of erasing a single bit of information, Landauer's principle can be generalised to characterise irreversibility in out-of-equilibrium processes, such as those involving complex quantum many-body systems. Specifically, the relationship between the entropy change of the system and the energy dissipated to its environment can be decomposed into changes in quantum mutual information and a difference in relative entropies of the environment. Here we experimentally probe Landauer's principle in the quantum many-body regime using a quantum field simulator of ultracold Bose gases. Employing a dynamical tomographic reconstruction scheme, we track the temporal evolution of the quantum field following a global mass quench from a Klein-Gordon to a Tomonaga-Luttinger liquid model and analyse the information-theoretic contributions to Landauer's principle for various system-environment partitions of the composite system. Our results agree with theoretical predictions, interpreted using a semi-classical quasiparticle picture. Our work demonstrates the potential of ultracold atom-based quantum field simulators to experimentally investigate quantum thermodynamics.

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