%0 Journal Article
%T Flux Qubits with Long Coherence Times for Hybrid Quantum Circuits
%A Michael Stern
%A Gianluigi Catelani
%A Yuimaru Kubo
%A Cecile Grezes
%A Audrey Bienfait
%A Denis Vion
%A Daniel Esteve
%A Patrice Bertet
%J Physics
%D 2014
%I arXiv
%R 10.1103/PhysRevLett.113.123601
%X We present measurements of superconducting flux qubits embedded in a three dimensional copper cavity. The qubits are fabricated on a sapphire substrate and are measured by coupling them inductively to an on-chip superconducting resonator located in the middle of the cavity. At their flux-insensitive point, all measured qubits reach an intrinsic energy relaxation time in the 6-20 microseconds range and a pure dephasing time comprised between 3 and 10 microseconds. This significant improvement over previous works opens the way to the coherent coupling of a flux-qubit to individual spins.
%U http://arxiv.org/abs/1403.3871v2