Blar i NTNU Open på forfatter "Belzig, Wolfgang"
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Antiferromagnetic magnons as highly squeezed Fock states underlying quantum correlations
Kamra, Akashdeep; Thingstad, Even; Rastelli, Gianluca; Duine, Rembert A.; Brataas, Arne; Belzig, Wolfgang; Sudbø, Asle (Peer reviewed; Journal article, 2019)Employing the concept of two-mode squeezed states from quantum optics, we demonstrate a revealing physical picture for the antiferromagnetic ground state and excitations. Superimposed on a Néel ordered configuration, a ... -
Exchange-enhanced ultrastrong magnon-magnon coupling in a compensated ferrimagnet
Liensberger, Lukas; Kamra, Akashdeep; Maier-Flaig, Hannes; Gepraegs, Stephan; Erb, Andreas; Goennenwein, Sebastian; Gross, Rudolf; Belzig, Wolfgang; Huebl, Hans; Weiler, Mathias (Peer reviewed; Journal article, 2019)We experimentally study the spin dynamics in a gadolinium iron garnet single crystal using broadband ferromagnetic resonance. Close to the ferrimagnetic compensation temperature, we observe ultrastrong coupling of clockwise ... -
Spin current cross-correlations as a probe of magnon coherence
Bender, Scott A.; Kamra, Akashdeep; Belzig, Wolfgang; Duine, Rembert (Peer reviewed; Journal article, 2019)Motivated by the important role of the normalized second-order coherence function, often called g(2), in the field of quantum optics, we propose a method to determine magnon coherence in solid-state devices. Namely, we ...