Work

Nonequilibrium thermodynamics of a superconducting Szilard engine

Year: 2025

Type: article

Abstract: We implement a Szilard engine using a 2-bit logical unit consisting of inductively coupled quantum flux parametrons—Josephson-junction superconducting circuits with applications in both the classical and quantum information processing regimes. Detailed simulations show that it is highly thermodynamically efficient while functioning as a Maxwell demon—converting heat to work. The physically-calibrated design is targeted to direct experimental exploration. However, in realizing experiments variations in Josephson junction fabrication introduce asymmetries that result in energy inefficiency and low operational fidelity. We provide a design solution that mitigates these practical challenges. The resulting platform is ideally suited to probe the thermodynamic foundations of information processing devices far from equilibrium.

Source: New Journal of Physics

DOI: 10.1088/1367-2630/adba81

Authors: Kuen Wai Tang, Kyle J Ray, James P Crutchfield

Institution: University of California, Davis

Language: English

Topic: Advanced Thermodynamics and Statistical Mechanics

Subfield: Statistical and Nonlinear Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,610

Funders: California Institute of Technology, Santa Fe Institute, Army Research Office, Army Research Laboratory