Quantum many-body states and Green's functions of nonequilibrium electron-magnon systems: Localized spin operators versus their mapping to Holstein-Primakoff bosons
Source abstract
Abstract
In spintronics and magnonics, the operators of localized spins are typically mapped to Holstein-Primakoff bosons, whose series expansion is truncated at a low order so as to make possible the use of Feynman diagrammatic techniques. However, this work demonstrates that tracking the exact nonequilibrium dynamics of localized spins, alone or interacting with conduction electrons, requires a prohibitively large order of truncation beyond the femtosecond timescale. Nevertheless, this can be remedied by the very recently proposed resummed Holstein-Primakoff transformation.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Quantum and electron transport phenomena · Physics of Superconductivity and Magnetism · Magnetic properties of thin films
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, USA
Department of Physics and Astronomy, Clemson University, Clemson, South Carolina 29634, USA
Funding
National Science Foundation · Materials Research Science and Engineering Center, Harvard University · University of Delaware
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