Work

Pseudoratchet through one-dimensional quantum Brownian motion for energy-efficient Brownian computing

Year: 2025

Type: article

Abstract: We propose a pseudoratchet mechanism based on one-dimensional (1D) quantum Brownian motion, offering a route to energy-efficient Brownian computing without relying on conventional ratchet structures. Quantum resonance effects in 1D system naturally partition the momentum space into dynamically independent subspaces, each of which lacks inversion symmetry. This leads to spontaneous unidirectional particle transport near thermal equilibrium, without external forces or asymmetric potential gradients. We analyze this pseudoratchet mechanism from kinetic and entropic perspectives and show that the directional transport is sustained without energy dissipation, remaining fully consistent with the second law of thermodynamics. Our analysis provides a microscopic and physically grounded foundation for reversible information transport in Brownian computing.

Source: Physical Review Research

DOI: 10.1103/fskm-y179

Authors: Sho Nakade, Ferdinand Peper, Kazuki Kanki, Tomio Petrosky

Institutions: Mie University, National Institute of Information and Communications Technology, Osaka Metropolitan University, The University of Tokyo, The University of Texas at Austin

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: $2,625

Funders: Japan Society for the Promotion of Science, Core Research for Evolutional Science and Technology