Dephasing-assisted macrospin transport

Abstract

Transport phenomena are ubiquitous in physics, and it is generally understood that the environmental disorder and noise deteriorates the transfer of excitations. There are however cases in which transport can be enhanced by fluctuations. In the present work we show, by means of micromagnetics simulations, that transport efficiency in a chain of classical macrospins can be greatly increased by an optimal level of dephasing noise. We demonstrate also the same effect in a simplified model, the dissipative Discrete Nonlinear Schrödinger equation subject to phase noise. Our results point towards the realisation of a large class of magnonics and spintronics devices, where disorder and noise can be used to enhance spin-dependent transport efficiency.

Contribution to the Entropy special issue "Recent developments in dissipative phenomena"

References in corpus (8)

• Spin Seebeck insulator
• Dephasing assisted transport: Quantum networks and biomolecules
• Environment-Assisted Quantum Transport
• Highly efficient energy excitation transfer in light-harvesting complexes: The fundamental role of noise-assisted transport
• The nonequilibrium discrete nonlinear Schroedinger equation
• Dephasing-assisted transport in linear triple quantum dots
• A Chain, a Bath, a Sink and a Wall
• Coherent energy transport in classical nonlinear oscillators: an analogy with the Josephson effect