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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Hybrid quantum circuits: Superconducting circuits interacting with other quantum systems
TL;DR: Hybrid quantum circuits combine two or more physical systems, with the goal of harnessing the advantages and strengths of the different systems in order to better explore new phenomena and potentially bring about novel quantum technologies as discussed by the authors.
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Quantum technologies with hybrid systems
Gershon Kurizki,Patrice Bertet,Yuimaru Kubo,Klaus Mølmer,David Petrosyan,David Petrosyan,Peter Rabl,Jörg Schmiedmayer +7 more
TL;DR: Some of the driving theoretical ideas and first experimental realizations of hybrid quantum systems and the opportunities and challenges they present are reviewed and offers a glance at the near- and long-term perspectives of this fascinating and rapidly expanding field.
Journal ArticleDOI
Coherent coupling between a ferromagnetic magnon and a superconducting qubit
Yutaka Tabuchi,Seiichiro Ishino,Atsushi Noguchi,Toyofumi Ishikawa,Rekishu Yamazaki,Koji Usami,Yasunobu Nakamura,Yasunobu Nakamura +7 more
TL;DR: In this paper, the authors demonstrate the coherent coupling between a single-magnon excitation in a millimeter-sized ferromagnetic sphere and a superconducting qubit.
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Hybrid quantum systems based on magnonics
TL;DR: In this paper, a new class of hybrid quantum systems based on collective spin excitations in ferromagnetic materials has led to a diverse set of experimental platforms which are outlined in this review article.
Journal ArticleDOI
Magnon dark modes and gradient memory.
Xufeng Zhang,Chang-Ling Zou,Chang-Ling Zou,Na Zhu,Florian Marquardt,Liang Jiang,Hong X. Tang +6 more
TL;DR: It is demonstrated that by dissipation engineering, a non-Markovian interaction dynamics between the magnon and the microwave cavity photon can be achieved, which enables a magnon gradient memory to store information in the Magnon dark modes, which decouple from the microwave cavities and thus preserve a long lifetime.
References
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Journal ArticleDOI
Hybrid Quantum Circuit with a Superconducting Qubit Coupled to a Spin Ensemble
Yuimaru Kubo,Cecile Grezes,A. Dewes,Takahide Umeda,Junichi Isoya,Hitoshi Sumiya,Norio Morishita,Hiroshi Abe,Shinobu Onoda,Takeshi Ohshima,Vincent Jacques,A. Dréau,Jean-François Roch,Igor Diniz,Alexia Auffèves,Denis Vion,Daniel Esteve,Patrice Bertet +17 more
TL;DR: Using a hybrid quantum circuit combining a superconducting qubit and an ensemble of electronic spins, a superposition of the qubit states is prepared that is stored into collective excitations of the spin ensemble and retrieved back into the qubits later on.
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Normal-mode splitting and linewidth averaging for two-state atoms in an optical cavity
TL;DR: Observations of the spectral response of the composite system to weak external modulation reveal a coupling-induced normal-mode splitting in the radiative processes for a collection of N two-state atoms strongly coupled to the field of a high-finesse optical cavity.
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Coherent coupling of a superconducting flux qubit to an electron spin ensemble in diamond
Xiaobo Zhu,Shiro Saito,Alexander Kemp,Kosuke Kakuyanagi,Shin-ichi Karimoto,Hayato Nakano,William J. Munro,Yasuhiro Tokura,Mark S. Everitt,Kae Nemoto,Makoto Kasu,Norikazu Mizuochi,Kouichi Semba +12 more
TL;DR: Evidence of coherent strong coupling between a single macroscopic superconducting artificial atom (a flux qubit) and an ensemble of electron spins in the form of nitrogen–vacancy colour centres in diamond provides a foundation for future quantum memories and hybrid devices coupling microwave and optical systems.
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Cavity QED with magnetically coupled collective spin states.
Robert Amsüss,Christian Koller,Tobias Nöbauer,Stefan Putz,Stefan Rotter,Kathrin Sandner,Stephan Schneider,Matthias Schramböck,Georg Steinhauser,Helmut Ritsch,Jörg Schmiedmayer,Johannes Majer +11 more
TL;DR: Strong coupling between an ensemble of nitrogen-vacancy center electron spins in diamond and a superconducting microwave coplanar waveguide resonator is reported and hyperfine coupling to (13)C nuclear spins is measured, which is a first step towards a nuclear ensemble quantum memory.
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Magnetic and Crystallographic Properties of Substituted Yttrium-Iron Garnet, 3 Y 2 O 3 · x M 2 O 3 · ( 5 − x ) Fe 2 O 3
M. A. Gilleo,S. Geller +1 more
TL;DR: In this article, a solid solution of yttrium-iron garnet is formed over the entire range of composition, and the lattice constant variation is nearly linear; the magnetic moment initially rises with octahedral substitution of nonmagnetic ions and falls with tetrahedral substitution.