Entanglement dynamics in dissipative photonic Mott insulators

Kaelan Donatella (1) , Alberto Biella (2, 1) , Alexandre Le Boité (3) , Cristiano Ciuti (1)

1 MPQ (UMR_7162) - Laboratoire Matériaux et Phénomènes Quantiques
2 JEIPCdF - Jeunes Équipes de l'Institut de Physique du Collège de France
3 MPQ (UMR_7162) - Laboratoire Matériaux et Phénomènes Quantiques

We theoretically investigate the entanglement dynamics in photonic Mott insulators in the presence of particle losses and dephasing. We explore two configurations where entanglement is generated following the injection or extraction of a photon in the central site of a chain of cavity resonators. We study the entanglement negativity of two-site reduced density matrices as a function of time and inter-site distance. Our findings show that in spite of particle losses the quantum entanglement propagation exhibits a ballistic character with propagation speeds related to the differerent quasiparticles that are involved in the dynamics, namely photonic doublons and holons respectively. Our analysis reveals that photon dissipation has a strikingly asymmetric behavior in the two configurations with a much more dramatic role on the holon entanglement propagation than for the doublon case.

Domaines: Physique Quantique [quant-ph]

Kaelan Donatella, Alberto Biella, Alexandre Le Boité, Cristiano Ciuti. Entanglement dynamics in dissipative photonic Mott insulators. Physical Review Research, 2020, 2 (4), ⟨10.1103/PhysRevResearch.2.043232⟩. ⟨hal-03054568⟩