Title
Coherent spin-spin coupling mediated by virtual microwave photons
Author
Harvey-Collard, P.
Dijkema, J.
Zheng, G.
Sammak, A.
Scappucci, G.
Vandersypen, L.M.K.
Publication year
2022
Abstract
We report the coherent coupling of two electron spins at a distance via virtual microwave photons. Each spin is trapped in a silicon double quantum dot at either end of a superconducting resonator, achieving spin-photon couplings up to around gs/2π = 40 MHz. As the two spins are brought into resonance with each other, but detuned from the photons, an avoided crossing larger than the spin linewidths is observed with an exchange splitting around 2J/2π = 20 MHz. In addition, photon-number states are resolved from the shift 2χs/2π = −13 MHz that they induce on the spin frequency. These observations demonstrate that we reach the strong dispersive regime of circuit quantum electrodynamics with spins. Achieving spin-spin coupling without real photons is essential to long-range two-qubit gates between spin qubits and scalable networks of spin qubits on a chip.
Subject
Electrodynamics
Electrospinning
Quantum optics
Qubits
Semiconductor quantum dots
Superconducting resonators
Avoided crossings
Coherent coupling
Detuned
Exchange splitting
Microwave photon
Photon number state
Silicon double quantum dot
Spin frequency
Spin qubit
Spin-spin couplings
Photons
High Tech Systems & Materials
Industrial Innovation
To reference this document use:
http://resolver.tudelft.nl/uuid:ccb8e042-6f77-4914-8728-70338180b147
DOI
https://doi.org/10.1103/physrevx.12.021026
TNO identifier
970735
Publisher
American Physical Society AIP
ISSN
2160-3308
Source
Physical Review X, 12 (12)
Document type
article