Authors
Brooks Foxen, Charles Neill, Andrew Dunsworth, Pedram Roushan, Ben Chiaro, Anthony Megrant, Julian Kelly, Zijun Chen, Kevin Satzinger, Rami Barends, F Arute, Kunal Arya, Ryan Babbush, Dave Bacon, JC Bardin, Sergio Boixo, D Buell, Brian Burkett, Yu Chen, Roberto Collins, Edward Farhi, Austin Fowler, C Gidney, Marissa Giustina, Rob Graff, M Harrigan, Trent Huang, SV Isakov, Evan Jeffrey, Zhang Jiang, Dvir Kafri, Kostyantyn Kechedzhi, Paul Klimov, Alexander Korotkov, Fedor Kostritsa, Dave Landhuis, Erik Lucero, Jarrod McClean, Matthew McEwen, Xiao Mi, Masoud Mohseni, JY Mutus, Ofer Naaman, Matthew Neeley, M Niu, A Petukhov, C Quintana, N Rubin, D Sank, V Smelyanskiy, A Vainsencher, TC White, Z Yao, P Yeh, A Zalcman, H Neven, John M Martinis, Google AI Quantum
Publication date
2020/9/15
Journal
Physical Review Letters
Volume
125
Issue
12
Pages
120504
Publisher
American Physical Society
Description
Quantum algorithms offer a dramatic speedup for computational problems in material science and chemistry. However, any near-term realizations of these algorithms will need to be optimized to fit within the finite resources offered by existing noisy hardware. Here, taking advantage of the adjustable coupling of gmon qubits, we demonstrate a continuous two-qubit gate set that can provide a threefold reduction in circuit depth as compared to a standard decomposition. We implement two gate families: an imaginary swap-like (iSWAP-like) gate to attain an arbitrary swap angle, θ, and a controlled-phase gate that generates an arbitrary conditional phase, ϕ. Using one of each of these gates, we can perform an arbitrary two-qubit gate within the excitation-preserving subspace allowing for a complete implementation of the so-called Fermionic simulation (fSim) gate set. We benchmark the fidelity of the iSWAP-like and …
Total citations
202020212022202320242668617333
Scholar articles
B Foxen, C Neill, A Dunsworth, P Roushan, B Chiaro… - Physical Review Letters, 2020