New Qubit Suppresses Odd Harmonics by Two Orders of Magnitude

Researchers at the Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, Denmark; the Department of Electrical, Computer & Energy Engineering, University of Colorado Boulder, Boulder, CO, USA; and the Department of Physics, University of Colorado Boulder, Boulder, CO, USA have developed a new superconducting qubit design that suppresses unwanted signal noise, specifically odd harmonics, by up to two orders of magnitude, as described in their results. This design combines aluminum-oxide tunnel junctions with a gate-tunable InAs/Al nanowire junction to demonstrate control over Cooper pair tunneling. The work demonstrates a…