Super-Poissonian shot noise of squeezed-magnon mediated spin transport

Abstract

The magnetization of a ferromagnet (F) driven out of equilibrium injects pure spin current into an adjacent conductor (N). Such F$|$N bilayers have become basic building blocks in a wide variety of spin based devices. We evaluate the shot noise of the spin current traversing the F$|$N interface when F is subjected to a coherent microwave drive. We find that the noise spectrum is frequency independent up to the drive frequency, and increases linearly with frequency thereafter. The low frequency noise indicates super-Poissonian spin transfer, which results from quasi-particles with effective spin ${\hslash }^{\ast }=\hslash (1+\delta )$. For typical ferromagnetic thin films, $\delta \sim 1$ is related to the dipolar interaction-mediated squeezing of F eigenmodes.

4 pages, 2 figures

References in corpus (8)

• Spin convertance at magnetic interfaces
• Coherent elastic excitation of spin waves
• Semiconductor Spin Noise Spectroscopy: Fundamentals, Accomplishments, and Challenges
• Interfacial Spin and Heat Transfer between Metals and Magnetic Insulators
• Spin-Flip Noise in a Multi-Terminal Spin-Valve
• Experimental Violation Of Bell-like Inequalities By Electronic Shot Noise
• Shot Noise Induced by Nonequilibrium Spin Accumulation
• Spin Hall noise

Cited by in corpus (80)

• Quantum magnonics: when magnon spintronics meets quantum information science
• Cavity Magnonics
• Remote generation of magnon Schrödinger cat state via magnon-photon entanglement
• Excitation of unidirectional exchange spin waves by a nanoscale magnetic grating
• Light scattering by magnons in whispering gallery mode cavities
• Resources of nonlinear cavity magnonics for quantum information
• Chirality as Generalized Spin-Orbit Interaction in Spintronics
• Observation of the Magnon Polarization
• Antiferromagnetic magnons as highly squeezed Fock states underlying quantum correlations
• Gilbert damping phenomenology for two-sublattice magnets
• Spin cat states in a ferromagnetic insulator
• Chiral Phonon Transport Induced by Topological Magnons
• Magnon-squeezing as a niche of quantum magnonics
• Noninteger-spin magnonic excitations in untextured magnets
• Spin pumping and shot noise in ferrimagnets: bridging ferro- and antiferromagnets
• Spin current noise of the spin Seebeck effect and spin pumping
• Microscopic theory of spin transport at the interface between the superconductor and a ferromagnetic insulator
• Tuning entanglement by squeezing magnons in anisotropic magnets
• Pure spin currents in magnetically ordered insulator/normal metal heterostructures
• Chiral excitation of spin waves in ferromagnetic films
• Optimal mode matching in cavity optomagnonics
• Enhancement of superconductivity mediated by antiferromagnetic squeezed magnons
• Magnon squeezing by two-tone driving of a qubit in cavity-magnon-qubit systems
• Non-local coupling between antiferromagnets and ferromagnets in cavities
• Magnon-mediated spin current noise in ferromagnet$|$non-magnetic conductor hybrids
• Chiral coupling of magnons in waveguides
• Achieving Strong Magnon Blockade through Magnon Squeezing in a Cavity Magnetomechanical System
• Surface dynamics of rough magnetic films
• Polarization dependent scattering in cavity optomagnonics
• Magnon squeezing enhanced entanglement in a cavity magnomechanical system
• Microscopic Theory of the Spin Hall Magnetoresistance
• Theory of quantum entanglement and the structure of two-mode squeezed antiferromagnetic magnon vacuum
• Master equation approach to magnon relaxation and dephasing
• Magnon squeezing via reservoir-engineered optomagnomechanics
• Ultrastrong magnon-photon coupling and entanglement in superconductor/ferromagnet nanostructures
• Unconventional magnon excitation by off-resonant microwaves
• Resolving nonclassical magnon composition of a magnetic ground state via a qubit
• Magnon decay theory of Gilbert damping in metallic antiferromagnets
• Pure dephasing of magnonic quantum states
• Cavity magnonics with easy-axis ferromagnet: Critically enhanced magnon squeezing and light-matter interaction
• Spin current cross-correlations as a probe of magnon coherence
• Quantum many-body states and Green functions of nonequilibrium electron-magnon systems: Localized spin operators vs. their mapping to Holstein-Primakoff bosons
• Parametrically squeezed states of microwave magnons in yttrium iron garnet films
• Magnomechanics in suspended magnetic beams
• Magnonic Noise and Wiedemann-Franz Law
• Detecting End-States of Topological Quantum Paramagnets via Spin Hall Noise Spectroscopy
• Quantum Sensing of Antiferromagnetic Magnon Two-Mode Squeezed Vacuum
• Quantum tomography of magnons using Brillouin light scattering
• Noise in tunneling spin current across coupled quantum spin chains
• Neutron Scattering Study on Yttrium Iron Garnet for Spintronics
• Nonequilibrium noise as a probe of pair-tunneling transport in the BCS--BEC Crossover
• Green's function formalism for nonlocal elliptical magnon transport
• Anisotropic and controllable Gilbert-Bloch dissipation in spin valves
• Current noise geometrically generated by a driven magnet
• Magnon-mediated quantum gates for superconducting qubits
• Electrical detectability of magnon-mediated spin current shot noise
• Asymmetric quantum shot noise in magnon transport
• Magnon-magnon interaction induced by nonlinear spin wave dynamics
• Detecting Spin Transport in Quantum Magnets with Photons
• Intersublattice entanglement entropy as an extensive property in antiferromagnets
• Shot noise of charge and spin transport in a junction with a precessing molecular spin
• Squeezed Dirac and Topological Magnons in a Bosonic Honeycomb Optical Lattice
• Enhanced Sensing by Geometric Tuning of YIG Spheres: Noise Reduction, Signal Amplification and Directional Magnetic Field Detection
• Spin Pumping into two-dimensional systems
• Diverging entanglement of critical magnons in easy-axis antiferromagnets
• Magnon squeezing near a quantum critical point in a cavity-magnon-qubit system
• Circuit-based cavity magnonics in the ultrastrong and deep-strong coupling regimes
• Nonreciprocal Macroscopic Entanglement through Magnon Squeezing in a Cavity Magnomechanics
• Breaking of Coulomb blockade by macrospin-assisted tunneling
• Inductive magnon noise spectroscopy
• Fluctuations in Spin Dynamics Excited by Pulsed Light
• Universal $1/3$-suppression of magnonic shot noise in diffusive insulating magnets
• Dynamics of Pure Spin Current in High-frequency Quantum Regime
• Influence of low-energy magnons on magnon Hanle experiments in easy-plane antiferromagnets
• Engineering long-lived entanglement through dissipation in quantum hybrid solid-state platforms
• Laser induced enhanced coupling between photons and squeezed magnons in antiferromagnets
• Phase-switchable nonreciprocal entanglement via magnon squeezing in ring-cavity optomagnomechanics
• Tunable anisotropic quantum Rabi model via a magnon--spin-qubit ensemble
• Theory of drift-enabled control in nonlocal magnon transport
• Squeezing and quantum control of antiferromagnetic magnon pseudospin