Erlangen 2022 – wissenschaftliches Programm

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SYQC: Symposium Quantum Cooperativity of Light and Matter

SYQC 1: Quantum Cooperativity of Light and Matter - Session 1

SYQC 1.4: Vortrag

Donnerstag, 17. März 2022, 11:30–11:45, Audimax

Modified spontaneous emission rates in free space via conditional measurements — •Manuel Bojer1, Lukas Götzendörfer1, Romain Bachelard2, and Joachim von Zanthier11Institut für Optik, Information und Photonik, Universität Erlangen-Nürnberg, 91058 Erlangen, Germany — 2Departamento de Física, Universidade Federal de São Carlos, Rodovia Washington Luís, km 235 - SP-310, 13565-905 São Carlos, SP, Brazil

We study the emission properties of three identical two-level atoms initially prepared in the excited state by measuring Glauber's third-order intensity correlation function. Assuming two of the three atoms located close to each other, such that they are subject to the dipole-dipole interaction, while the third one is placed several wavelengths away, we observe super- or subradiant emission behavior for the last recorded photon. Differently from the case where no conditional measurements are performed and/or no remote atom is present, the emission pattern presents both spatial and temporal modifications. In fact, the first two conditional photon measurements associated with the three-photon correlation function entangle the remote atom with the two other atoms while the dipole-dipole interaction between the two close atoms allows manipulating the decay rates, leading to a rich interference pattern for the last recorded photon with effective symmetric and antisymmetric decay rates depending on the direction of observation.

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