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Cavity-mediated iSWAP oscillations between distant spins

Journal Article (2024)
Author(s)

Jurgen Dijkema (TU Delft - QCD/Vandersypen Lab, Kavli institute of nanoscience Delft, TU Delft - QuTech Advanced Research Centre)

Xiao Xue (TU Delft - QCD/Vandersypen Lab, Kavli institute of nanoscience Delft, TU Delft - QuTech Advanced Research Centre)

Patrick Harvey-Collard (TU Delft - QuTech Advanced Research Centre, Kavli institute of nanoscience Delft, TU Delft - QCD/Vandersypen Lab)

Maximilian Rimbach-Russ (Kavli institute of nanoscience Delft, TU Delft - QCD/Rimbach-Russ, TU Delft - QuTech Advanced Research Centre)

Sander L. de Snoo (TU Delft - QuTech Advanced Research Centre, TU Delft - QCD/Vandersypen Lab, Kavli institute of nanoscience Delft)

Guoji Zheng (Kavli institute of nanoscience Delft, TU Delft - QCD/Vandersypen Lab, TU Delft - QuTech Advanced Research Centre)

Amir Sammak (TNO, TU Delft - QuTech Advanced Research Centre, TU Delft - BUS/TNO STAFF)

Giordano Scappucci (Kavli institute of nanoscience Delft, TU Delft - QCD/Scappucci Lab, TU Delft - QuTech Advanced Research Centre)

Lieven M.K. Vandersypen (TU Delft - QN/Vandersypen Lab, Kavli institute of nanoscience Delft, TU Delft - QuTech Advanced Research Centre)

Research Group
QCD/Vandersypen Lab
DOI related publication
https://doi.org/10.1038/s41567-024-02694-8 Final published version
More Info
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Publication Year
2024
Language
English
Research Group
QCD/Vandersypen Lab
Journal title
Nature Physics
Issue number
1
Volume number
21
Article number
13575
Pages (from-to)
168-174
Downloads counter
338
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Abstract

Direct interactions between quantum particles naturally fall off with distance. However, future quantum computing architectures are likely to require interaction mechanisms between qubits across a range of length scales. In this work, we demonstrate a coherent interaction between two semiconductor spin qubits 250 μm apart using a superconducting resonator. This separation is several orders of magnitude larger than for the commonly used direct interaction mechanisms in this platform. We operate the system in a regime in which the resonator mediates a spin–spin coupling through virtual photons. We report the anti-phase oscillations of the populations of the two spins with controllable frequency. The observations are consistent with iSWAP oscillations of the spin qubits, and suggest that entangling operations are possible in 10 ns. These results hold promise for scalable networks of spin qubit modules on a chip.