Signatures of superradiance as a witness to multipartite entanglement

Abstract

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 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 by Dicke himself to the presence of multipartite entangled states. We investigate this connection in a quantitative way and discuss, whether or not signatures of superradiance from semiconductor nanolasers, manifesting themselves as a modification of the spontaneous-emission time, can be interpreted as a witness to detect entanglement in the underlying state of the emitters.

References in corpus (7)

• Entanglement detection
• Observation of Dicke Superradiance for Two Artificial Atoms in a Cavity with High Decay Rate
• Universality of Dicke superradiance in arrays of quantum emitters
• Experimental generation of multi-photon Fock states
• Multipartite entanglement detection via structure factors
• Delocalized information in quantum networks
• Cavity Sub- and Superradiance Enhanced Ramsey Spectroscopy

Cited by in corpus (7)

• Collective photon emission in solid state environments: Concatenating non-markovian and markovian dynamics
• Genuine Multipartite Entanglement induced by a Thermal Acoustic Reservoir
• Exact solution for the collective non-Markovian decay of two fully excited quantum emitters
• Influence of initial states on memory effects: A study of early-time superradiance
• Nonradiant multiphoton states in quantum ring oligomers
• Genuine $k$-partite correlations and entanglement in the ground state of the Dicke model for interacting qubits
• Classifying coherence with a finite set of witnesses