The Floquet Fluxonium Molecule: Driving Down Dephasing in Coupled
Superconducting Qubits
- URL: http://arxiv.org/abs/2401.08762v2
- Date: Tue, 13 Feb 2024 03:22:11 GMT
- Title: The Floquet Fluxonium Molecule: Driving Down Dephasing in Coupled
Superconducting Qubits
- Authors: Matthew Thibodeau, Angela Kou, Bryan K. Clark
- Abstract summary: High-coherence qubits are necessary building blocks for quantum computers.
We propose a superconducting qubit architecture that uses a Floquet flux drive to modify the spectrum of a static fluxonium molecule.
Our results indicate that driven qubits are able to outperform some of their static counterparts.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: High-coherence qubits, which can store and manipulate quantum states for long
times with low error rates, are necessary building blocks for quantum
computers. We propose a superconducting qubit architecture that uses a Floquet
flux drive to modify the spectrum of a static fluxonium molecule. The
computational eigenstates have two key properties: disjoint support to minimize
bit flips, along with first- and second-order insensitivity to flux noise
dephasing. The rates of the three main error types are estimated through
numerical simulations, with predicted coherence times of approximately 50 ms in
the computational subspace and erasure lifetimes of about 500 $\mu$s. We give a
protocol for high-fidelity single qubit rotation gates via additional flux
modulation on timescales of roughly 500 ns. Our results indicate that driven
qubits are able to outperform some of their static counterparts.
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