Analytical modeling of parametrically-modulated transmon qubits Systems R&D We focus on superconducting quantum processors based on transmons for which full numerical simulations are already challenging at the level of qubytes.

We present a novel transmon qubit fabrication technique that yields systematic improvements in T1 coherence times. We fabricate devices using an encapsulation strategy that involves passivating the surface of niobium and thereby preventing the formation of its lossy surface oxide.

Conceptual Design Requirements for a Gate-based Superconducting Transmon Quantum Computer • The hardware design must incorporate the ability to o Construct a physical system with (at least) two uniquely addressable quantum mechanical states o …

In this paper, we revisit transmon qubit theory by utilizing a systematic perturbation theory to model interacting transmons at sub-kHz accuracy with respect to numerical diagonalization. The resulting analytical expressions are particularly useful to estimate crosstalk in …

Dec 15, 2021 · Rigetti’s superconducting quantum processors are based on the transmon design [1]. Each physical qubit is an anharmonic oscillator, meaning that the energy gaps between subsequent qubit energy...

In this paper, we revisit transmon qubit theory by utilizing a systematic perturbation theory to model interacting transmons at sub-kHz accuracy with respect to numerical diagonalization. The resulting analytical expressions are particularly useful to estimate crosstalk in …

Sep 24, 2018 · We describe and implement a family of entangling gates activated by radio-frequency ux modu-lation applied to a tunable transmon that is statically coupled to a neighboring transmon.

yCorresponding author: [email protected] A comprehensive understanding of these insights could enable higher performance quantum processors. Here, we present an extensive study on manufactur-ing techniques for superconducting quantum devices. By characterizing 96 individual CPWRs and 146 transmon qubits with common design layouts, we demonstrate ...

Here, we demonstrate high-fidelity multi-shot optical readout through an optical fiber of a superconducting transmon qubit connected via a coaxial cable to a fully integrated piezo-optomechanical transducer.

Sep 28, 2021 · Here we demonstrate a modular solid state architecture with deterministic inter-module coupling between four physically separate, interchangeable superconducting qubit integrated circuits,...