Coherent population oscillations and an effective spin-exchange interaction in a symmetric polariton mixture

• Published in: Europhysics letters Vol. 129; no. 3; pp. 37003 - 37009
• Main Authors: Kalozoumis, P. A., Nikolopoulos, G. M., Petrosyan, D.
• Format: Journal Article
• Language: English
• Published: Les Ulis EDP Sciences, IOP Publishing and Società Italiana di Fisica 27-02-2020; IOP Publishing
• Subjects: Dynamic structural analysis; Excitons; Mixtures; Oscillations; Particle spin; Polaritons; Qubits (quantum computing); Spin dynamics
• ISSN: 0295-5075; 1286-4854
• DOI: 10.1209/0295-5075/129/37003

We study a two-species mixture of exciton-polaritons with self- and cross-interaction nonlinearities in a double-well structure, in the presence of relaxation and continuous pumping. We identify the conditions that render the system parity-time symmetric, and investigate its dynamic and static properties. We show that the system can exhibit long-term coherent oscillations of populations of the two polaritonic components between the two potential wells, and can simulate the dynamics of a pair of spin-1/2 particles (qubits) in the presence of exchange interaction.