High cooperativity in coupled microwave resonator ferrimagnetic insulator hybrids.
Hans Huebl,Christoph W. Zollitsch,Johannes Lotze,Fredrik Hocke,Moritz Greifenstein,Achim Marx,Rudolf Gross,Sebastian T. B. Goennenwein +7 more
TLDR
The observation of strong coupling between the exchange-coupled spins in a gallium-doped yttrium iron garnet and a superconducting coplanar microwave resonator made from Nb demonstrates that exchange-Coupled systems are suitable for cavity quantum electrodynamics experiments, while allowing high integration densities due to their spin densities of the order of one Bohr magneton per atom.Abstract:
We report the observation of strong coupling between the exchange-coupled spins in a gallium-doped yttrium iron garnet and a superconducting coplanar microwave resonator made from Nb. The measured coupling rate of 450 MHz is proportional to the square root of the number of exchange-coupled spins and well exceeds the loss rate of 50 MHz of the spin system. This demonstrates that exchange-coupled systems are suitable for cavity quantum electrodynamics experiments, while allowing high integration densities due to their spin densities of the order of one Bohr magneton per atom. Our results furthermore show, that experiments with multiple exchange-coupled spin systems interacting via a single resonator are within reach.read more
Citations
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Journal ArticleDOI
Magnon decay theory of Gilbert damping in metallic antiferromagnets
TL;DR: In this paper, a theoretical study of intrinsic Gilbert damping induced by magnon decay in antiferromagnetic metals through $s\ensuremath{-}d$ exchange interaction is presented.
Journal Article
Nonlocal Coupling between Antiferromagnets and Ferromagnets in Cavities
Øyvind Johansen,Arne Brataas +1 more
TL;DR: In this article, the authors derive analytical expressions for the coupling strengths and find that the coupling between antiferromagnetic and ferromagnetic magnons is comparable to that between two ferromagnets.
Journal ArticleDOI
Subpicoliter Magnetoptical Cavities
TL;DR: In this article, an open magneto-optical cavity containing a thin film of yttrium iron garnet (YIG) was proposed to achieve a 0.1 pL (approximately 50$ ) optical mode volume, approximately $50$ times smaller than previous devices.
Book ChapterDOI
Roadmap for photon-magnon coupling and its applications
Biswanath Bhoi,Sang-Koog Kim +1 more
TL;DR: In this paper, several key milestones and progress achieved so far in the field of photon-magnon coupling (PMC) have been noted, as well as current challenges and future research directions in this emerging field.
Journal ArticleDOI
Quantitative Modeling of Superconducting Planar Resonators for Electron Spin Resonance
Stefan Weichselbaumer,Petio Natzkin,Christoph W. Zollitsch,Mathias Weiler,Rudolf Gross,Rudolf Gross,Hans Huebl,Hans Huebl +7 more
TL;DR: In this article, a simulation of the spin-photon coupling rate is presented for superconducting planar micro-resonators, and three resonator designs are optimized to address spectroscopy applications in $\ensuremath{\mu}$m-thick samples.
References
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Journal ArticleDOI
Circuit quantum electrodynamics in the ultrastrong-coupling regime
T. Niemczyk,Frank Deppe,Hans Huebl,Edwin P. Menzel,Fredrik Hocke,M. J. Schwarz,Juan José García-Ripoll,David Zueco,Thomas Hümmer,Enrique Solano,Enrique Solano,Achim Marx,Rudolf Gross +12 more
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Demonstration of two-qubit algorithms with a superconducting quantum processor
Leonardo DiCarlo,Jerry M. Chow,Jay M. Gambetta,Lev S. Bishop,Blake R. Johnson,David Schuster,Johannes Majer,Alexandre Blais,Luigi Frunzio,Steven Girvin,Robert Schoelkopf +10 more
TL;DR: A two-qubit superconducting processor and the implementation of the Grover search and Deutsch–Jozsa quantum algorithms are demonstrated and the generation of highly entangled states with concurrence up to 94 per cent is allowed.