Journal
PHYSICAL REVIEW LETTERS
Volume 102, Issue 9, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.102.090501
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Funding
- Dutch Organization for Fundamental Research on Matter ( FOM)
- EU EuroSQIP
- NanoNED program
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We experimentally demonstrate the in situ tunability of the minimum energy splitting (gap) of a superconducting flux qubit by means of an additional flux loop. Pulses applied via a local control line allow us to tune the gap over a range of several GHz on a nanosecond time scale. The strong flux sensitivity of the gap (up to similar to 0.7 GHz/m Phi(0)) opens up the possibility to create different types of tunable couplings that are effective at the degeneracy point of the qubit. We investigate the dependence of the relaxation time and the Rabi frequency on the qubit gap.
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