Resonant single-shot CNOT in remote double quantum dot spin qubits
A critical element towards the realization of scalable quantum processors is non-local coupling between nodes. Scaling connectivity beyond nearest-neighbor interactions requires the implementation of a mediating interaction often termed a 'quantum bus'. Cavity photons have long been used a...
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Zusammenfassung: | A critical element towards the realization of scalable quantum processors is
non-local coupling between nodes. Scaling connectivity beyond nearest-neighbor
interactions requires the implementation of a mediating interaction often
termed a 'quantum bus'. Cavity photons have long been used as a bus by the
superconducting qubit community, but it has only recently been demonstrated
that spin-based qubits in double quantum dot architectures can reach the strong
coupling regime and exhibit spin-spin interactions via the exchange of real or
virtual photons. Two-qubit gate operations are predicted in the dispersive
regime where cavity loss plays a less prominent role. In this work we propose a
framework for ac-driven quantum gates, in the context of a CNOT operation,
between two non-local single-spin qubits dispersively coupled to a common mode
of a superconducting resonator. We expect gate times near 150 ns and fidelities
above 90% with existing technology. |
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DOI: | 10.48550/arxiv.2207.13588 |