Optimized cavity-mediated dispersive two-qubit gates between spin qubits
| Autor: | Guido Burkard, Jason R. Petta, Mónica Benito |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: |
Physics
Quantum Physics Photon Condensed Matter - Mesoscale and Nanoscale Physics Silicon quantum dots FOS: Physical sciences Physics::Optics 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Single electron Computer Science::Emerging Technologies Superconducting cavity Qubit Electric field Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences ddc:530 Atomic physics Quantum Physics (quant-ph) 010306 general physics 0210 nano-technology Coherence (physics) |
| Popis: | The recent realization of a coherent interface between a single electron in a silicon quantum dot and a single photon trapped in a superconducting cavity opens the way for implementing photon-mediated two-qubit entangling gates. In order to couple a spin to the cavity electric field some type of spin-charge hybridization is needed, which impacts spin control and coherence. In this work we propose a cavity-mediated two-qubit gate and calculate cavity-mediated entangling gate fidelities in the dispersive regime, accounting for errors due to the spin-charge hybridization, as well as photon- and phonon-induced decays. By optimizing the degree of spin-charge hybridization, we show that two-qubit gates mediated by cavity photons are capable of reaching fidelities exceeding 90% in present-day device architectures. High iSWAP gate fidelities are achievable even in the presence of charge noise at the level of $2\,\mu\text{eV}$. Comment: 10 pages, 5 figures |
| Databáze: | OpenAIRE |
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