Chiral Quantum Optics in the Bulk of Photonic Quantum Hall Systems

Year: 2023

Authors: De Bernardis D., Piccioli FS., Rabl P., Carusotto I.

Autors Affiliation: Univ Trento, Pitaevskii BEC Ctr, CNR INO, I-38123 Trento, Italy; Univ Trento, Dipartimento Fis, I-38123 Trento, Italy; TU Wien, Vienna Ctr Quantum Sci & Technol, Atominstitut, A-1020 Vienna, Austria; Tech Univ Munich, TUM Sch Nat Sci, Phys Dept, D-85748 Garching, Germany; Walther Meissner Inst Tieftemp Forsch, Bayer Akad Wissensch, D-85748 Garching, Germany; Munich Ctr Quantum Sci & Technol MCQST, D-80799 Munich, Germany.

Abstract: We study light-matter interactions in the bulk of a two-dimensional photonic lattice system, where photons are subject to the combined effect of a synthetic magnetic field and an orthogonal synthetic electric field. In this configuration, chiral waveguide modes appear in the bulk region of the lattice, in direct analogy to transverse Hall currents in electronic systems. By evaluating the non-Markovian dynamics of emitters that are coupled to those modes, we identify critical coupling conditions, under which the shape of the spontaneously emitted photons becomes almost fully symmetric. Combined with a directional, dispersionless propagation, this property enables a complete reabsorption of the photon by another distant emitter, without relying on any time-dependent control. We show that this mechanism can be generalized to arbitrary in-plane synthetic potentials, thereby enabling flexible realizations of reconfigurable networks of quantum emitters with arbitrary chiral connectivity.

Journal/Review: PRX QUANTUM

Volume: 4 (3)      Pages from: 30306-1  to: 30306-21

More Information: We are grateful to Alberto Nardin, Giuseppe Calajo, and Alexander Szameit for fruitful discussions. This work is supported by the Provincia Autonoma di Trento, by the Q@TN initiative, and by the PNRR MUR project PE0000023-NQSTI. P.R. acknowledges support from the European Union’s Horizon 2020 research and innovation programme under Grant Agreement No. 899354 (SuperQuLAN) . This research is part of the Munich Quantum Valley, which is supported by the Bavarian state government with funds from the Hightech Agenda Bayern Plus.
KeyWords: Edge States; Localization; Percolation; Matter
DOI: 10.1103/PRXQuantum.4.030306

Citations: 6
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