Resources of nonlinear cavity magnonics for quantum information
arXiv:1910.11130 · doi:10.1103/PhysRevB.101.054402
Abstract
We theoretically explore nonlinearities of ferromagnets in microwave cavities in the classical and quantum regimes, and assess the resources for quantum information, i.e. fluctuation squeezing and bipartite entanglement. The (semi-)classical analysis of the anharmonic oscillator (Duffing) model for the Kittel mode when including all other magnon modes, reveals chaotic and limit-cycle phases that do not survive in quantum calculations. However, magnons with nonzero wavenumbers that are driven by the Suhl instability of the Kittel mode, form a genuine limit cycle. We subsequently compute bounds for the distillable entanglement, as well as entanglement of formation for the bipartite configurations of the mixed magnon modes. The distillable entanglement of bipartite states accessible from a covariance matrix vanishes, but can be recovered by injection locking. The predicted magnon entanglement can be experimentally tested with yttrium iron garnet samples under realistic conditions.
References in corpus (19)
- Non-Abelian Anyons and Topological Quantum Computation
- The density-matrix renormalization group in the age of matrix product states
- Strongly coupled magnons and cavity microwave photons
- Hybridizing ferromagnetic magnons and microwave photons in the quantum limit
- Squeezing and entanglement in a Bose-Einstein condensate
- Spin Pumping in Electrodynamically Coupled Magnon-Photon Systems
- Magnon Kerr effect in a strongly coupled cavity-magnon system
- Triple-resonant Brillouin light scattering in magneto-optical cavities
- Cooling and squeezing via quadratic optomechanical coupling
- Measurements of the Correlation Function of a Microwave Frequency Single Photon Source
- Gaussian measures of entanglement versus negativities: the ordering of two-mode Gaussian states
- Effect of Induced Spin-Orbit Coupling for Atoms via Laser Fields
- Path Entanglement of Continuous-Variable Quantum Microwaves
- Magnon-phonon interactions in magnetic insulators
- Full characterization of Gaussian bipartite entangled states by a single homodyne detector
- Planck Spectroscopy and the Quantum Noise of Microwave Beam Splitters
- Chiral excitation of spin waves in ferromagnetic films
- A Superconducting 180° Hybrid Ring Coupler for circuit Quantum Electrodynamics
- Synchronization of spin-transfer torque oscillators by spin pumping, inverse spin Hall, and spin Hall effects