Self-Organized Bottleneck and Coexistence of Incongruous States in a Microwave Phonon Laser (Phaser)

TL;DR

This paper investigates the emergence of regular and chaotic structures in a microwave phonon laser, revealing a self-organized bottleneck and coexistence of different states, with modeling based on cellular automata.

Contribution

It experimentally uncovers phenomena of self-organized bottleneck and coexistence of incongruous states in a microwave phonon laser, proposing a cellular automata model for these effects.

Findings

Observation of regular and chaotic fine structures in phonon laser spectra

Detection of a self-organized bottleneck in spectral evolution

Revelation of coexistence of stationary, periodic, and chaotic states

Abstract

Phenomena of emergence of regular and chaotic fine structure (FS) in stimulated emission (SE) power spectra of an autonomous microwave phonon laser (phaser) have been revealed and investigated experimentally in pink ruby at liquid helium temperatures. The phenomenon of a self-organized bottleneck in evolution of the microwave acoustic FS lines has been observed by means of narrow-range phonon SE spectral analysis. The large-scale phenomenon of coexistence of incongruous (stationary, periodic and chaotic) states in the whole spin-phonon phaser system has been revealed in experiments with panoramic power spectra of phonon SE. We propose a possible direction for modeling of both the observed phenomena on the basis of three-level cellular automata (S.D.Makovetskiy and D.N.Makovetskii, arXiv:cond-mat/0410460v2; S.D.Makovetskiy, arXiv:cond-mat/0602345v1) which emulate evolution of a bounded phaser-like excitable system.