Cavity cooling using ultrafast electrons
Quantum Physics
2026-01-30 v1
Abstract
We propose a method to cool a thermal photonic state in a cavity by passing electrons through it. Electrons are coherently split into two paths, with one path traversing the cavity, becoming entangled with its photonic state. A sequence of such entanglement interactions can achieve cooling of the cavity: e.g., a twofold reduction in thermal photon number with a 25% post-selection probability. This ``which-path''-based approach extends to other qubit oscillator systems, such as phonons in crystals or optomechanical resonators, offering a general framework for quantum oscillator cooling.
Cite
@article{arxiv.2504.11018,
title = {Cavity cooling using ultrafast electrons},
author = {D. E. Maison and L. Stettiner and S. Even-Haim and A. Gorlach and I. Kaminer},
journal= {arXiv preprint arXiv:2504.11018},
year = {2026}
}