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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High cooperativity coupling between a phosphorus donor spin ensemble and a superconducting microwave resonator
Christoph W. Zollitsch,Kai Mueller,David P. Franke,Sebastian T. B. Goennenwein,Martin S. Brandt,Rudolf Gross,Rudolf Gross,Hans Huebl +7 more
TL;DR: In this paper, the authors investigate the coupling of an ensemble of phosphorus donors in an isotopically purified 28Si host lattice interacting with a superconducting coplanar waveguide resonator.
Journal ArticleDOI
Enhanced entanglement and asymmetric EPR steering between magnons
Shasha Zheng,Shasha Zheng,Feng-Xiao Sun,Feng-Xiao Sun,Huaiyang Yuan,Zbigniew Ficek,Qihuang Gong,Qihuang Gong,Qiongyi He,Qiongyi He +9 more
TL;DR: In this paper, the authors studied the entanglement and EPR steering between two macroscopic magnons in a hybrid ferrimagnet-light system and found that in the absence of light, the two types of magnons on the two sublattices can be entangled, but no quantum steering occurs when they are damped with the same rates.
Journal ArticleDOI
Quantum drives produce strong entanglement between YIG samples without using intrinsic nonlinearities
TL;DR: In this article, an entangled pair of yttrium iron garnet (YIG) samples was generated in a cavity-magnon system without using any nonlinearities which are typically very weak.
Journal ArticleDOI
Magnon-photon strong coupling for tunable microwave circulators
TL;DR: In this article, the authors present a theoretical framework to describe non-reciprocal microwave circulation in a multimode cavity magnonic system and assess the optimal performance of practical circulator devices.
References
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Journal ArticleDOI
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.
Journal ArticleDOI
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.
Journal ArticleDOI
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.
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
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.
Journal ArticleDOI
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.