SKM 2023 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 43: Semiconductor lasers II
HL 43.1: Invited Talk
Thursday, March 30, 2023, 15:00–15:30, JAN 0027
Superradiance as a witness to multipartite entanglement — •Frederik Lohof1,2 and Christopher Gies1,2 — 1Institute for Theoretical Physics, University of Bremen, Bremen — 2BCCMS, University of Bremen, Bremen
Generation and detection of entanglement is at the forefront of most quantum information technologies. There is a plethora of techniques that reveal entanglement on the basis of only partial information about the underlying quantum state including, in particular, entanglement witnesses. Superradiance refers to the phenomenon of highly synchronized photon emission from an ensemble of quantum emitters that is caused by correlations among the individual particles and has been connected to the presence of multipartite entangled states. We investigate this connection in a quantitative way and discuss the question, whether or not signatures of superradiance from semiconductor nanolasers, e.g. as revealed by photon-correlation measurements, can be interpreted as a witness to detect entanglement in the underlying state of the emitters.