A proposal for detecting the spin of a single electron in superfluid helium
arXiv:2308.07174
Abstract
The electron bubble in superfluid helium has two degrees of freedom that may offer exceptionally low dissipation: the electron's spin and the bubble's motion. If these degrees of freedom can be read out and controlled with sufficient sensitivity, they would provide a novel platform for realizing a range of quantum technologies and for exploring open questions in the physics of superfluid helium. Here we propose a practical scheme for accomplishing this by trapping an electron bubble inside a superfluid-filled opto-acoustic cavity.
Main text: 5 pages, 5 figures. Supplement: 13 pages, 4 figures, 1 table