Dynamical multistability in a quantum-dot laser
Year: 2019
Authors: Mantovani M., Armour A.D., Belzig W., Rastelli G.
Autors Affiliation: Univ Konstanz, Fachbereich Phys, D-78457 Constance, Germany. Univ Nottingham, Ctr Math & Theoret Phys Quantum Nonequilibrium Sy, Nottingham NG7 2RD, England. Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England. Univ Konstanz, Zukunftskolleg, D-78457 Constance, Germany.
Abstract: We study the dynamical multistability of a solid-state single-atom laser implemented in a quantum-dot spin valve. The system is formed by a resonator that interacts with a two-level system in a dot in contact with two ferromagnetic leads of antiparallel polarization. We show that a spin-polarized current provides high-efficiency pumping leading to regimes of multistable lasing, in which the Fock distribution of the oscillator displays a multipeaked distribution. The emergence of multistable lasing follows from the breakdown of the usual rotating-wave approximation for the coherent spin-resonator interaction which occurs at relatively weak couplings. The multistability manifests itself directly in the charge current flowing through the dot, switching between distinct current levels corresponding to the different states of oscillation.
Journal/Review: PHYSICAL REVIEW B
Volume: 99 (4) Pages from: 045442 to: 045442
More Information: We thank Mark Dykman, Christian Flindt, and Fabio Pistolesi for useful discussions. This research was supported by the German Excellence Initiative through the Zukunftskolleg and the Deutsche Forschungsgemeinschaft (SFB767).KeyWords: single-atom lasing, quantum dots, quantum microwave circuitsDOI: 10.1103/PhysRevB.99.045442Citations: 23data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-10-27References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here