English

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

R2 v1 2026-07-01T10:41:14.905Z