Authors
Rami Barends, CM Quintana, AG Petukhov, Yu Chen, Dvir Kafri, Kostyantyn Kechedzhi, Roberto Collins, Ofer Naaman, Sergio Boixo, F Arute, Kunal Arya, D Buell, Brian Burkett, Z Chen, Ben Chiaro, Andrew Dunsworth, Brooks Foxen, Austin Fowler, C Gidney, Marissa Giustina, Rob Graff, Trent Huang, Evan Jeffrey, J Kelly, Paul Victor Klimov, Fedor Kostritsa, Dave Landhuis, Erik Lucero, Matt McEwen, Anthony Megrant, Xiao Mi, Josh Mutus, Matthew Neeley, Charles Neill, Eric Ostby, Pedram Roushan, Daniel Sank, KJ Satzinger, A Vainsencher, T White, J Yao, P Yeh, A Zalcman, H Neven, VN Smelyanskiy, John M Martinis
Publication date
2019/11/19
Journal
Physical review letters
Volume
123
Issue
21
Pages
210501
Publisher
American Physical Society
Description
We demonstrate diabatic two-qubit gates with Pauli error rates down to 4.3 (2)× 10− 3 in as fast as 18 ns using frequency-tunable superconducting qubits. This is achieved by synchronizing the entangling parameters with minima in the leakage channel. The synchronization shows a landscape in gate parameter space that agrees with model predictions and facilitates robust tune-up. We test both i swap-like and cphase gates with cross-entropy benchmarking. The presented approach can be extended to multibody operations as well.
Scholar articles
R Barends, CM Quintana, AG Petukhov, Y Chen… - Physical review letters, 2019