Bulletin of the American Physical Society
APS March Meeting 2019
Volume 64, Number 2
Monday–Friday, March 4–8, 2019; Boston, Massachusetts
Session F42: Applications of Noisy Intermediate Scale Quantum Computers III
11:15 AM–2:03 PM,
Tuesday, March 5, 2019
BCEC
Room: 210A
Sponsoring
Unit:
DQI
Chair: Kristan Temme
Abstract: F42.00012 : Implementing the Variational Quantum Eigensolver with native 2-qubit interaction and error mitigation*
1:51 PM–2:03 PM
Presenter:
Takahiro Tsunoda
(Condensed Matter Physics, University of Oxford)
Authors:
Takahiro Tsunoda
(Condensed Matter Physics, University of Oxford)
Andrew D Patterson
(Condensed Matter Physics, University of Oxford)
Xiao Yuan
(Materials, University of Oxford)
Suguru Endo
(Materials, University of Oxford)
Joseph Rahamim
(Condensed Matter Physics, University of Oxford)
Peter A Spring
(Condensed Matter Physics, University of Oxford)
Martina Esposito
(Condensed Matter Physics, University of Oxford)
Salha Jebari
(Condensed Matter Physics, University of Oxford)
Kitti Ratter
(Condensed Matter Physics, University of Oxford)
Sophia Sosnina
(Condensed Matter Physics, University of Oxford)
Giovanna Tancredi
(Condensed Matter Physics, University of Oxford)
Brian Vlastakis
(Condensed Matter Physics, University of Oxford)
Simon Benjamin
(Materials, University of Oxford)
Peter Leek
(Condensed Matter Physics, University of Oxford)
In this presentation, we report a quantum chemistry simulation using the VQE on a 2-qubit superconducting device in which we use fixed frequency qubits and build the algorithm using the native 2-qubit interaction resulting from a static capacitive coupling. The hardware ansatz of the VQE is constructed by varying the timings of echo pulses to manipulate the native ZZ coupling. This method allows us to implement a VQE algorithm without needing repeated 2-qubit-gate tune-up, and enables simple and understandable implementation of error mitigation.
*We acknowledge financial support from the EPSRC, Oxford Instruments Nanoscience, Oxford Quantum Circuits Ltd, the Oxford Centre for Applied Superconductivity, the Nakajima Foundation and the Masason Foundation.
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