Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session K46: Defect Qubits II - Quantum Control and Hybrid Devices
3:00 PM–6:00 PM,
Tuesday, March 5, 2024
Room: 200AB
Sponsoring
Unit:
DQI
Chair: Kaushalya Jhuria, Lawrence Berkeley National Laboratory
Abstract: K46.00003 : High-fidelity quantum gates on spin-qubit registers in diamond*
3:24 PM–3:36 PM
Presenter:
Margriet van Riggelen
(Delft University of Technology)
Authors:
Margriet van Riggelen
(Delft University of Technology)
Hans P Bartling
(Delft University of Technology)
Jiwon Yun
(Delft University of Technology)
Benjamin van Ommen
(Delft University of Technology)
Kai-Niklas Schymik
(Delft University of Technology)
Luc A Enthoven
(Delft University of Technology)
Masoud Babaie
(Delft University of Technology)
Fabio Sebastiano
(Delft University of Technology)
Tim H Taminiau
(Delft University of Technology)
We first use a model system in an isotopically purified diamond (0.01% 13C isotope) to obtain ideal case single-qubit gate fidelities of 99.999(1)% and two-qubit gate fidelities exceeding 99.9%. We then discuss our progress towards larger qubit registers by moving to a diamond sample with a natural abundance 13C (1.1%) and using the 13C spins as qubits. We discuss the challenges for high gate fidelity such as crosstalk and the effect of the spin bath. This work represents a benchmark for quantum information applications using NV centers in diamond, as well as other electron-nuclear spin systems.
[1] D. D. Awschalom et al. Quantum technologies with optically interface solid-state spins. Nature Photonics 12, 516 (2018)
[2] E. Nielsen et al. Gate Set Tomography. Quantum 5, 557 (2021)
*We gratefully acknowledge support from the joint research program ‘Modular quantum computers’ by Fujitsu Limited and Delft University of Technology, co-funded by the Netherlands Enterprise Agency under project number PPS2007.
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