TY - JOUR TI - Signatures of cooperative emission in photon coincidence: Superradiance versus measurement-induced cooperativity AU - Cygorek, Moritz AU - Scerri, Eleanor D. AU - Santana, Ted S. AU - Koong, Zhe X. AU - Gerardot, Brian D. AU - Gauger, Erik M. T2 - Physical Review A AB - Indistinguishable quantum emitters confined to length scales smaller than the wavelength of the light become superradiant. Compared to uncorrelated and distinguishable emitters, superradiance results in qualitative modifications of optical signals such as photon coincidences. However, recent experiments revealed that similar signatures can also be obtained in situations where emitters are too far separated to be superradiant if correlations between emitters are induced by the wave-function collapse during an emission-angle-selective photon detection event. Here, we compare two sources for cooperative emission, superradiance and measurement-induced cooperativity, and analyze their impact on time-dependent optical signals. We find that an antidip in photon coincidences at zero time delay is a signature of interemitter correlations in general but does not unambiguously prove the presence of superradiance. This suggests that photon coincidences at zero time delay alone are not sufficient and time-dependent data are necessary to clearly demonstrate a superradiant enhancement of the spontaneous radiative decay rate. DA - 2023/02/17/ PY - 2023 DO - 10.1103/PhysRevA.107.023718 DP - APS VL - 107 IS - 2 SP - 023718 J2 - Phys. Rev. A ST - Signatures of cooperative emission in photon coincidence UR - https://link.aps.org/doi/10.1103/PhysRevA.107.023718 Y2 - 2023/02/21/11:03:04 KW - 2D materials KW - Brian Gerardot KW - QPL KW - quantum emitter KW - subradiance KW - superradiance ER -