New material platform for superconducting transmon qubits with coherence times exceeding 0.3 milliseconds.

ABSTRACT: The superconducting transmon qubit is a leading platform for quantum computing and quantum science. Building large, useful quantum systems based on transmon qubits will require significant improvements in qubit relaxation and coherence times, which are orders of magnitude shorter than limits imposed by bulk properties of the constituent materials. This indicates that relaxation likely originates from uncontrolled surfaces, interfaces, and contaminants. Previous efforts to improve qubit lifetimes have focused primarily on designs that minimize contributions from surfaces. However, significant improvements in the lifetime of two-dimensional transmon qubits have remained elusive for several years. Here, we fabricate two-dimensional transmon qubits that have both lifetimes and coherence times

SUBMITTER: Place APM 

PROVIDER: S-EPMC7979772 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature