Controlled flow of excitations in a ring-shaped network of Rydberg atoms

Year: 2023

Authors: Perciavalle F., Rossini D., Haug T., Morsch O., Amico L.

Autors Affiliation: Technol Innovat Inst, Quantum Res Ctr, POB 9639, Abu Dhabi, U Arab Emirates; Univ Pisa, Dipartimento Fis, Largo Pontecorvo 3, I-56127 Pisa, Italy; INFN, Largo Pontecorvo 3, I-56127 Pisa, Italy; Imperial Coll London, Blackett Lab, QOLS, London SW7 2AZ, England; Univ Pisa, Dipartimento Fis E Fermi, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy; CNR INO, Via G Moruzzi 1, I-56124 Pisa, Italy; INFN Sez Catania, Via S Sofia 64, I-95123 Catania, Italy; Natl Univ Singapore, Ctr Quantum Technol, Singapore, Singapore.

Abstract: Highly excited Rydberg atoms are a powerful platform for quantum simulation and information processing. Here, we propose atomic ring networks to study chiral currents of Rydberg excitations. The currents are controlled by a phase pattern imprinted via a Raman scheme and can persist even in the presence of dephasing. Depending on the interplay between the Rabi coupling of Rydberg states and the dipole-dipole atom interaction, the current shows markedly different features. The excitations propagate with a velocity displaying a characteristic peak in time, reflecting the chiral nature of the current. We find that the time-averaged current in a quench behaves similarly to the ground-state current. This analysis paves the way for the development of new methods to transport information in atomic networks.

Journal/Review: PHYSICAL REVIEW A

Volume: 108 (2)      Pages from: 23305-1  to: 23305-10

More Information: We thank Enrico Domanti, Juan Polo, and Wayne J. Chetcuti for discussions. The Julian Schwinger Foundation Grant No. JSF-18-12-0011 is acknowledged. O.M. also acknowledges support by the H2020 ITN MOQS (Grant Agreement No. 955479) and MUR (Ministero dell’Universita e della Ricerca) through the PNRR MUR Project No. PE0000023-NQSTI. Numerical computations have been performed using the Julia packages QUANTUMOPTICS.JL and ITENSORS.JL [38,39].
KeyWords: Edge States; Quantum; Dynamics
DOI: 10.1103/PhysRevA.108.023305

ImpactFactor: 2.600
Citations: 7
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