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
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Tunable Magnetically Induced Transparency Spectra in Magnon-Magnon Coupled <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"><mml:msub><mml:mi mathvariant="normal">Y</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi>Fe</mml:mi><mml:mn>5</mml:mn></mml:m
Yuzan Xiong,Jerad Inman,Zheng-zhong Li,Kaile Xie,Rao Bidthanapally,Joseph Sklenar,Peng Li,Steven Louis,V. Tyberkevych,Hongwei Qu,Zhili Xiao,W. K. Kwok,Valentyn Novosad,Yi Li,Fusheng Ma,Weiya Zhang +15 more
TL;DR: In this article , a tunable magnetically induced transparency (MIT) and Purcell effect was demonstrated in a magnon-magnon coupled system via changing the magnetic field orientations.
Journal ArticleDOI
Transfer of squeezing in a cavity magnomechanics system
TL;DR: In this article , a cavity magnomechanical system composed of a microwave (MW) cavity, magnon, and phonon modes is considered, where the magnon is coupled, respectively, to the MW cavity, and the phonon can also be squeezed by driving the magnons through a strong red-detuned MW field.
Journal ArticleDOI
Auxiliary Mode Mediated Coherent and Complex Couplings in a Cavity Magnonic System
TL;DR: In this article , a three-mode cavity magnonic system consisting of a two-port cavity, a yttrium iron garnet (YIG) sphere (magnon mode), and a split-ring resonator (auxiliary mode) was studied, and the coupling effect was theoretically analyzed by solving the steadystate equation combined with numerical simulation.
Journal ArticleDOI
Generation of a Schrödinger cat state in a hybrid ferromagnet-superconductor system
Shi-kun He,Xuanxuan Xin,Chong Li +2 more
TL;DR: In this paper , the authors proposed an approach to generate magnonic Schr\"odinger cat states (SCSs) in a hybrid ferromagnet-superconductor system, where the coherent amplitude and the fidelities of the cat states can be adjusted by controlling the parameters of the system.
Journal ArticleDOI
Phase-resolved electrical detection of coherently coupled magnonic devices
Yi Li,Chenbo Zhao,Vivek Amin,Vivek Amin,Zhizhi Zhang,Michael Vogel,Michael Vogel,Yuzan Xiong,Yuzan Xiong,Joseph Sklenar,Ralu Divan,John E. Pearson,Mark D. Stiles,Wei Zhang,Wei Zhang,Axel Hoffmann,Valentyn Novosad +16 more
TL;DR: In this article, the authors demonstrate the electrical detection of magnon-magnon hybrid dynamics in yttrium iron garnet/permalloy (YIG/Py) thin film bilayer devices.
References
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Coherence in Spontaneous Radiation Processes
TL;DR: In this article, the authors considered a radiating gas as a single quantum-mechanical system, and the energy levels corresponding to certain correlations between individual molecules were described, where spontaneous emission of radiation in a transition between two such levels leads to the emission of coherent radiation.
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Strong coupling of a single photon to a superconducting qubit using circuit quantum electrodynamics
Andreas Wallraff,David Schuster,Alexandre Blais,Luigi Frunzio,Ren-Shou Huang,Ren-Shou Huang,Johannes Majer,Sushant Kumar,Steven Girvin,Robert Schoelkopf +9 more
TL;DR: It is shown that the strong coupling regime can be attained in a solid-state system, and the concept of circuit quantum electrodynamics opens many new possibilities for studying the strong interaction of light and matter.
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Introduction to quantum noise, measurement, and amplification
TL;DR: In this paper, a pedagogical introduction to the physics of quantum noise and its connections to quantum measurement and quantum amplification is given, and the basics of weak continuous measurements are described.
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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
TL;DR: In this article, it was shown that the Jaynes-cummings model breaks down in the regime of ultrastrong coupling between light and matter, and that higher-order processes are possible.
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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.