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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Tunable multiwindow magnomechanically induced transparency, Fano resonances, and slow-to-fast light conversion
TL;DR: In this article, the absorption and transmission properties of a weak probe field under the influence of a strong control field in a cavity magnomechanical system were investigated, where two ferromagnetic-material yttrium iron garnet (YIG) spheres coupled to a single cavity mode were investigated.
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Exceptional Point and Cross-Relaxation Effect in a Hybrid Quantum System
Guo-Qiang Zhang,Zhen Chen,Da Xu,Nathan Shammah,Meiyong Liao,Tie-Fu Li,Limin Tong,Shi-Yao Zhu,Franco Nori,J. Q. You +9 more
TL;DR: In this paper, an experimental observation of the EP in a hybrid quantum system consisting of dense nitrogen (P1) centers in diamond coupled to a coplanar-waveguide resonator is presented.
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Genuine photon-magnon-phonon Einstein-Podolsky-Rosen steerable nonlocality in a continuously-monitored cavity magnomechanical system
TL;DR: In this article, the authors considered the utilization of time-continuous quantum measurement to achieve hybrid photon-magnon-phonon nonlocality in a cavity magnomechanical interface.
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Spin-wave magnon-polaritons in a split-ring resonator/single-crystalline YIG system
TL;DR: In this article, a spin-wave magnon-polaritons were studied by using a split-ring resonator loaded with a spherical single-crystal bulk yttrium-iron-garnet chip.
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Magnonic Quadrupole Topological Insulator in Antiskyrmion Crystals.
TL;DR: In this paper, it was shown that tuning an applied magnetic field can trigger the self-assembly of antiskyrmions carrying a fractional topological charge along the sample edges, restoring the symmetries needed to enforce the emergence of the magnonic corner states.
References
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Strong coupling of a single photon to a superconducting qubit using circuit quantum electrodynamics
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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
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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.