- Letter
Spin-exchange collisions in hot vapors creating and sustaining bipartite entanglement
Phys. Rev. A 103, L010401 – Published 6 January, 2021
DOI: https://doi.org/10.1103/PhysRevA.103.L010401
Abstract
Spin-exchange collisions in alkali or alkali-noble gas vapors are at the basis of quantum sensing, nucleon structure studies, tests of fundamental symmetries, and medical imaging. We here show that spin-exchange collisions in hot alkali vapors naturally produce strong bipartite entanglement, which we explicitly quantify using the tools of quantum information science. This entanglement is shown to have a lifetime at least as long as the spin-exchange relaxation time, and to directly affect measurable spin noise observables. This is a formal theoretical demonstration that a hot and dense atomic vapor dominated by random spin-exchange collisions can support long-lived bipartite and possibly higher-order entanglement.
Physics Subject Headings (PhySH)
Corrections
12 January, 2021
Correction: The curve on the left-hand side in the previously published Figure 1(b) was processed improperly during the production stage and its rendition has been fixed.
