- document
-
Rol, M.A. (author), Ciorciaro, L.S.L. (author), Malinowski, F.K. (author), Tarasinski, B.M. (author), Sagastizabal, R.E. (author), Bultink, C.C. (author), Salathe, Y. (author), Haandbaek, N. (author), Sedivy, J. (author), DiCarlo, L. (author)We introduce Cryoscope, a method for sampling on-chip baseband pulses used to dynamically control qubit frequency in a quantum processor. We specifically use Cryoscope to measure the step response of the dedicated flux control lines of two-junction transmon qubits in circuit QED processors with the temporal resolution of the room-temperature...journal article 2020
- document
-
Rol, M.A. (author), Battistel, F. (author), Malinowski, F.K. (author), Bultink, C.C. (author), Tarasinski, B.M. (author), Vollmer, R. (author), Haider, S.N. (author), Muthusubramanian, N. (author), Bruno, A. (author), Terhal, B.M. (author), DiCarlo, L. (author)Conditional-phase (cz) gates in transmons can be realized by flux pulsing computational states towards resonance with noncomputational ones. We present a 40 ns cz gate based on a bipolar flux pulse suppressing leakage (0.1%) by interference and approaching the speed limit set by exchange coupling. This pulse harnesses a built-in echo to...journal article 2019