Abstract
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 6-20μs range and a pure dephasing time comprised between 3 and 10μs. This significant improvement over previous works opens the way to the coherent coupling of a flux qubit to individual spins.
Original language | English |
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Article number | 123601 |
Journal | Physical Review Letters |
Volume | 113 |
Issue number | 12 |
DOIs | |
State | Published - 19 Sep 2014 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2014 American Physical Society.
Funding
Funders | Funder number |
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European Commission | |
Japan Society for the Promotion of Science London | |
Research Executive Agency | CIG-618258 |
Seventh Framework Programme | 618258, 615767 |