Analog Quantum Control of Magnonic Cat States on a Chip by a Superconducting Qubit.
Phys Rev Lett
; 129(3): 037205, 2022 Jul 15.
Article
en En
| MEDLINE
| ID: mdl-35905351
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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MEDLINE
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En
Revista:
Phys Rev Lett
Año:
2022
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Article
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Países Bajos