Work

Quantum backflow for two identical particles

Year: 2025

Type: article

Abstract: Quantum mechanics introduces the possibility for particles to move in a direction opposite to their momentum—a counter-intuitive and classically impossible phenomenon known as quantum backflow. The magnitude of this effect is relatively small, making its experimental observation, which has yet to be achieved, particularly challenging. Here, we investigate the influence of quantum statistics on the maximal backflow attainable for two identical particles confined to a ring. Notably, we demonstrate that the fermionic statistics significantly impedes quantum backflow compared to the bosonic statistics. Our findings suggest that any future experimental realization of quantum backflow should prioritize systems involving bosons rather than fermions.

Source: New Journal of Physics

DOI: 10.1088/1367-2630/adb77e

Authors: Maximilien Barbier, Arseni Goussev

Institutions: Scottish Universities Physics Alliance, University of the West of Scotland, University of Geneva

Language: English

Topic: Quantum Mechanics and Applications

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,610

OpenAlex ID: W4407686128

FWCI: 1.111

Cites: 38

Cited by: 3

Related to: 10