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Superconducting Qubits

Superconducting qubit based on twisted cuprate van der Waals heterostructures

arXiv
Authors: Valentina Brosco, Giuseppe Serpico, Valerii Vinokur, Nicola Poccia, Uri Vool

Year

2023

Paper ID

56189

Status

Preprint

Abstract Read

~2 min

Abstract Words

111

Citations

N/A

Abstract

Van-der-Waals (vdW) assembly enables the fabrication of novel Josephson junctions utilizing an atomically sharp interface between two exfoliated and relatively twisted rm{Bi2Sr2CaCu2O8+x} (Bi2212) flakes. In a range of twist angles around 45circ, the junction provides a regime where the interlayer two-Cooper pair tunneling dominates the current-phase relation. Here we propose to employ this novel junction to realize a capacitively shunted qubit that we call flowermon. The d-wave nature of the order parameter endows the flowermon with inherent protection against charge-noise-induced relaxation and quasiparticle-induced dissipation. This inherently protected qubit paves the way to a new class of high-coherence hybrid superconducting quantum devices based on unconventional superconductors.

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  • Van-der-Waals (vdW) assembly enables the fabrication of novel Josephson junctions utilizing an atomically sharp interface between two exfoliated and relatively twisted...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2308.00839 [2] arXiv https://arxiv.org/abs/2308.00839 [3] Publisher https://arxiv.org/abs/2308.00839

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