Two-qubit logic between distant spins in silicon

• URL: http://arxiv.org/abs/2310.16805v1
• Date: Wed, 25 Oct 2023 17:37:03 GMT
• Title: Two-qubit logic between distant spins in silicon
• Authors: Jurgen Dijkema, Xiao Xue, Patrick Harvey-Collard, Maximilian Rimbach-Russ, Sander L. de Snoo, Guoji Zheng, Amir Sammak, Giordano Scappucci, Lieven M.K. Vandersypen
• Abstract summary: In this work, we utilize a superconducting resonator to facilitate a coherent interaction between two semiconductor spin qubits 250 $mu$m apart. Results hold promise for scalable networks of spin qubit modules on a chip.
• Score: 0.5561396798949833
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Direct interactions between quantum particles naturally fall off with distance. For future-proof qubit architectures, however, it is important to avail of interaction mechanisms on different length scales. In this work, we utilize a superconducting resonator to facilitate a coherent interaction between two semiconductor spin qubits 250 $\mu$m apart. This separation is several orders of magnitude larger than for the commonly employed direct interaction mechanisms in this platform. We operate the system in a regime where the resonator mediates a spin-spin coupling through virtual photons. We report anti-phase oscillations of the populations of the two spins with controllable frequency. The observations are consistent with iSWAP oscillations and ten nanosecond entangling operations. These results hold promise for scalable networks of spin qubit modules on a chip.

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