| Issue |
EPL
Volume 129, Number 3, February 2020
|
|
|---|---|---|
| Article Number | 37003 | |
| Number of page(s) | 7 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/129/37003 | |
| Published online | 27 February 2020 | |
Coherent population oscillations and an effective spin-exchange interaction in a 
symmetric polariton mixture
1 Materials Science Department, School of Natural Sciences, University of Patras - GR-26504 Patras, Greece
2 Hellenic American University - 436 Amherst st, Nashua, NH 0306 USA
3 Institute of Electronic Structure and Laser, FORTH - GR-70013 Heraklion, Crete, Greece
4 A. Alikhanian National Science Laboratory - 0036 Yerevan, Armenia
Received: 13 August 2019
Accepted: 11 February 2020
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.
PACS: 71.36.+c – Polaritons (including photon-phonon and photon-magnon interactions) / 11.30.Er – Charge conjugation, parity, time reversal, and other discrete symmetries / 03.67.-a – Quantum information
© EPLA, 2020
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