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Topologically protected nanoscale spin textures, known as magnetic skyrmions, possess particle-like properties and feature emergent magnetism effects. In bulk cubic heli-magnets, distinct skyrmion resonant modes are already identified using…

Semiconductor single-photon detectors cannot be straightforwardly adapted for the microwave regime, primarily because microwave photons carry far less energy and thus require cryogenic temperatures and specialized architectures. Here, we…

Quantum Physics · Physics 2025-01-22 Pratyush Anand , Ethan G. Arnault , Matthew E. Trusheim , Kurt Jacobs , Dirk R. Englund

We demonstrate that the spin state of solid-state emitters inside micropillar cavities can serve as measure qubits in syndrome measurements. The photons, acting as data qubits, interact with the spin state in the microcavity and the total…

Quantum Physics · Physics 2024-10-11 Elena Callus , Pieter Kok

Hybrid spin-mechanical setups offer a versatile platform for quantum science and technology, but improving the spin-phonon as well as the spin-spin couplings of such systems remains a crucial challenge. Here, we propose and analyze an…

Quantum Physics · Physics 2020-10-14 Peng-Bo Li , Yuan Zhou , Wei-Bo Gao , Franco Nori

The full coherent control of hybridized systems such as strongly coupled cavity photon-magnon states is a crucial step to enable future information processing technologies. Thus, it is particularly interesting to engineer deliberate control…

Mesoscale and Nanoscale Physics · Physics 2020-02-19 Isabella Boventer , Christine Dörflinger , Tim Wolz , Rair Macêdo , Romain Lebrun , Mathias Kläui , Martin Weides

The fields of cavity quantum electrodynamics and magnetism have recently merged into \textit{`cavity spintronics'}, investigating a quasiparticle that emerges from the strong coupling between standing electromagnetic waves confined in a…

We study dissipative spin-spin coupling in dispersive regime mediated by virtual photons in a microwave cavity. Dissipative coupling between magnetization of each magnetic material and the cavity photons is established by means of two phase…

Mesoscale and Nanoscale Physics · Physics 2019-07-17 Vahram L. Grigoryan , Ke Xia

Electrons bound to the surface of superfluid helium have been proposed for scalable charge and spin-based quantum computing. However single electron quantum measurement in this system has remained elusive. Here we use a hybrid circuit…

Charged quantum dots containing an electron or hole spin are bright solid-state qubits suitable for quantum networks and distributed quantum computing. Incorporating such quantum dot spin into a photonic crystal cavity creates a strong…

We analyze the magnetic dipole coupling of an ensemble of spins to a superconducting microwave stripline structure, incorporating a Josephson junction based transmon qubit. We show that this system is described by an embedded…

Quantum Physics · Physics 2010-04-22 Atac Imamoglu

Magnon-photon coupling has been experimentally realized inside a cavity and the emerging field known as cavity spintronics has attracted significant attention for its potential docking with quantum information science. However, one seldom…

Mesoscale and Nanoscale Physics · Physics 2020-04-27 H. Y. Yuan , Shasha Zheng , Zbigniew Ficek , Q. Y. He , Man-Hong Yung

Magnons, namely spin waves, are collective spin excitations in ferromagnets, and their control through coupling with other excitations is a key technology for future hybrid spintronic devices. Although strong coupling has been demonstrated…

Mesoscale and Nanoscale Physics · Physics 2022-03-18 D. Hatanaka , M. Asano , H. Okamoto , Y. Kunihashi , H. Sanada , H. Yamaguchi

We demonstrate strong magnon-photon coupling of a thin-film permalloy device fabricated on a coplanar superconducting resonator. A coupling strength of 0.152 GHz and a cooperativity of 68 are found for a 30-nm-thick permalloy stripe. The…

We present a theoretical approach to use ferro- or ferrimagnetic nanoparticles as microwave nanomagnonic cavities to concentrate microwave magnetic fields into deeply subwavelength volumes $\sim 10^{-13}$ mm$^3$. We show that the field in…

Quantum Physics · Physics 2021-01-04 Tomáš Neuman , Derek S. Wang , Prineha Narang

Silicon is vital to the computing industry due to the high quality of its native oxide and well-established doping technologies. Isotopic purification has enabled quantum coherence times on the order of seconds, thereby placing silicon at…

Mesoscale and Nanoscale Physics · Physics 2017-03-10 X. Mi , J. V. Cady , D. M. Zajac , P. W. Deelman , J. R. Petta

Semiconductor quantum dots (known as artificial atoms) hold great promise for solid-state quantum networks and quantum computers. To realize a quantum network, it is crucial to achieve light-matter entanglement and coherent quantum-state…

Quantum Physics · Physics 2009-01-27 C. Y. Hu , W. J. Munro , J. L. O'Brien , J. G. Rarity

Recent research on hybrid magnonics has been restricted by the long magnon wavelengths of the ferromagnetic resonance modes. We present an experiment on the hybridization of 250-nm wavelength magnons with microwave photons in a multimode…

Entanglement between atoms and microwave photons in a superconducting coplanar waveguide~(SCW) can enable hybrid quantum devices and interface static and flying qubits. We study a one-step controlled-Z~(C$_{\text{Z}}$) gate between a…

Quantum Physics · Physics 2022-12-14 Xiao-Feng Shi

Artificial atoms in solids are leading candidates for quantum networks, scalable quantum computing, and sensing, as they combine long-lived spins with mobile and robust photonic qubits. The central requirements for the spin-photon interface…

Quantum technologies require platforms that can coherently interface qubits with bosonic excitations. Photons have traditionally played this role in cavity quantum electrodynamics, but achieving the same goal using solid-state bosons…