Measurement Induced Subradiance
Quantum Physics
2026-02-19 v1
Abstract
Preparing subradiant steady states of collectively emitting quantum two-level emitters (TLEs) is hindered by their dark, weakly interacting nature. Existing approaches rely on patterned driving, local control, or structured environments. We propose a platform-independent protocol based on projective measurements on a single TLE. For permutation-symmetric ensembles, a single measurement yields appreciable occupation of single-excitation subradiant steady states. For generic arrays, repeated measurements on one emitter drive the unmeasured TLEs into a nearly pure state with large overlap with the subradiant Dicke subspace.
Cite
@article{arxiv.2602.16413,
title = {Measurement Induced Subradiance},
author = {Ipsita Bar and Aditi Thakar and B. Prasanna Venkatesh},
journal= {arXiv preprint arXiv:2602.16413},
year = {2026}
}
Comments
15 pages including supplementary material, 15 figures