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Open AccessArticle

Dephasing-Assisted Macrospin Transport

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Consiglio Nazionale delle Ricerche, Istituto dei Sistemi Complessi, via Madonna del Piano 10, I-50019 Sesto Fiorentino, Italy
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Dipartimento di Fisica e Astronomia, Università di Padova, via F. Marzolo 8 I-35131, Padova, Italy
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Department of Applied Physics, School of Engineering Sciences, KTH Royal Institute of Technology, Electrum 229, SE-16440 Kista, Sweden
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Department of Physics and Astronomy, Materials Theory Division, Uppsala University, Box 516, SE-75120 Uppsala, Sweden
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Istituto Nazionale di Fisica Nucleare, Sezione di Firenze, via G. Sansone 1 I-50019, Sesto Fiorentino, Italy
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Centre de Biophysique Moléculaire, (CBM), CNRS-UPR 4301, Rue C. Sadron, 45071 Orléans, France
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Université d’Orléans, Château de la Source, 45071 Orléans Cedex, France
*
Author to whom correspondence should be addressed.
Entropy 2020, 22(2), 210; https://doi.org/10.3390/e22020210
Received: 14 January 2020 / Revised: 7 February 2020 / Accepted: 10 February 2020 / Published: 13 February 2020
(This article belongs to the Special Issue Recent Developments in Dissipative Phenomena)
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 also demonstrate the same effect in a simplified model, the dissipative Discrete Nonlinear Schrödinger equation, subject to phase noise. Our results point towards the realization of a large class of magnonics and spintronics devices, where disorder and noise can be used to enhance spin-dependent transport efficiency. View Full-Text
Keywords: noise and transport; micromagnetic simulations; Discrete Nonlinear Schrödinger model; open systems noise and transport; micromagnetic simulations; Discrete Nonlinear Schrödinger model; open systems
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MDPI and ACS Style

Iubini, S.; Borlenghi, S.; Delin, A.; Lepri, S.; Piazza, F. Dephasing-Assisted Macrospin Transport. Entropy 2020, 22, 210.

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