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125 papers
Detection of temporal fluctuation in superconducting qubits for quantum error mitigation
Yuta Hirasaki, Shunsuke Daimon, Toshinari Itoko +2
We have investigated instability of a superconducting quantum computer by continuously monitoring the qubit output. We found that qubits exhibit a step-like change in the error rat…
Switching of magnon parametric oscillation by magnetic field direction
Sohei Horibe, Hiroki Shimizu, Koujiro Hoshi +3
Parametric oscillation occurs when the resonance frequency of an oscillator is periodically modulated. Owing to time-reversal symmetry breaking in magnets, nonreciprocal magnons ca…
Mechanism of electrical switching of ultra-thin CoO/Pt bilayers
Christin Schmitt, Adithya Rajan, Grischa Beneke +9
We study current-induced switching of the Néel vector in CoO/Pt bilayers to understand the underlaying antiferromagnetic switching mechanism. Surprisingly, we find that for ultra-t…
Ginzburg-Landau action and polarization current in an excitonic insulator model of electronic ferroelectricity
Hiroto Adachi, Naoshi Ikeda, Eiji Saitoh
In comparison to transport of spin polarization in ferromagnets, transport of electric polarization in ferroelectrics remains less explored. Taking an excitonic insulator model of…
Spin and spin current -- From fundamentals to recent progress
Sadamichi Maekawa, Takashi Kikkawa, Hiroyuki Chudo +2
Along with the progress of spin science and spintronics research, the flow of electron spins, (i.e. spin current), has attracted interest. New phenomena and electronic states were…
Composition-tunable magnon-polaron anomalies in spin Seebeck effects in epitaxial BiYFeO films
Takashi Kikkawa, Koichi Oyanagi, Tomosato Hioki +5
We have investigated hybridized magnon-phonon excitation (magnon polarons) in spin Seebeck effects (SSEs) in BiYFeO (BiYIG; , , and $…