Analog Quantum Control of Magnonic Cat States on a Chip by a Superconducting Qubit

Journal article (2022)

Authors

M. Kounalakis QN/Blanter Group - AS , Kavli institute of nanoscience Delft
G.E. Bauer Kavli institute of nanoscience Delft, Tohoku University, QN/Bauer Group - AS , University of Chinese Academy of Sciences
Y.M. Blanter Kavli institute of nanoscience Delft, QN/Blanter Group - AS
Research Group
QN/Blanter Group (AS) (TU Delft)
Copyright: © 2022 M. Kounalakis, G.E. Bauer, Y.M. Blanter
DOI: https://doi.org/10.1103/PhysRevLett.129.037205
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Published Date

2022

Language

English

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Faculty

Applied Sciences

Department

QN/Quantum Nanoscience

Research Group

QN/Blanter Group

Abstract

We propose to directly and quantum-coherently couple a superconducting transmon qubit to magnons - the quanta of the collective spin excitations, in a nearby magnetic particle. The magnet's stray field couples to the qubit via a superconducting quantum interference device. We predict a resonant magnon-qubit exchange and a nonlinear radiation-pressure interaction that are both stronger than dissipation rates and tunable by an external flux bias. We additionally demonstrate a quantum control scheme that generates magnon-qubit entanglement and magnonic Schrödinger cat states with high fidelity.

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