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DY: Fachverband Dynamik und Statistische Physik

DY 47: Statistical Physics: General I

DY 47.10: Vortrag

Donnerstag, 12. März 2026, 12:00–12:15, ZEU/0114

Universal irreversibility—an information loss paradigm — •Jürgen Stockburger — Institut for Complex Quantum Systems, Ulm University

I develop a general prescription to incorporate irreversibility into any physical dynamics governed by a reversible microscopic dynamics with interactions. A description of irreversibility is introduced from the perspective that reversibility is infeasible due to insufficient means, not as a fundamental alteration of any microscopic theory.

With an arbitrary partitioning into subsystems, a coupled dynamics between a projected (decorrelated) and a residual (complementary) state is formulated, still fully equivalent to the reversible dynamics. All partitions are treated equally, without designation of “system” and “bath”. With a (variable) truncation of the memory of the residual state, I recognize the fact that correlations in the distant past are undetectable in the present. The notion of irrecoverable correlation information is also implicit in current open-system approaches such as repeated interaction models [1]; the need to consider heat baths equally as a “system of interest” arises, e.g., in the context of quantum bolometry [2]. The framework of entropy augmentation through subadditive excess (EASE) introduces not only a universal view on irreversibility, it also provides a roadmap for actual computation [3].

[1] F. Ciccarello et al., Phys. Rep. 954, 1 (2022)

[2] B. Karimi et al., Nat. Comm. 11, 367 (2020)

[3] Stockburger, J.T., Eur. Phys. J. Spec. Top. (2025).

https://doi.org/10.1140/epjs/s11734-025-01923-2

Keywords: irreversibility; information theory; mutual information; Boltzmann equation