中文版 | English
Title

The Use of Exchange Coupled Atom Qubits as Atomic-Scale Magnetic Field Sensors

Author
Corresponding AuthorSimmons, Michelle Y.
Publication Years
2022-11-01
DOI
Source Title
ISSN
0935-9648
EISSN
1521-4095
Abstract
Phosphorus atoms in silicon offer a rich quantum computing platform where both nuclear and electron spins can be used to store and process quantum information. While individual control of electron and nuclear spins has been demonstrated, the interplay between them during qubit operations has been largely unexplored. This study investigates the use of exchange-based operation between donor bound electron spins to probe the local magnetic fields experienced by the qubits with exquisite precision at the atomic scale. To achieve this, coherent exchange oscillations are performed between two electron spin qubits, where the left and right qubits are hosted by three and two phosphorus donors, respectively. The frequency spectrum of exchange oscillations shows quantized changes in the local magnetic fields at the qubit sites, corresponding to the different hyperfine coupling between the electron and each of the qubit-hosting nuclear spins. This ability to sense the hyperfine fields of individual nuclear spins using the exchange interaction constitutes a unique metrology technique, which reveals the exact crystallographic arrangements of the phosphorus atoms in the silicon crystal for each qubit. The detailed knowledge obtained of the local magnetic environment can then be used to engineer hyperfine fields in multi-donor qubits for high-fidelity two-qubit gates.
Keywords
URL[Source Record]
Indexed By
Language
English
Important Publications
NI Journal Papers
SUSTech Authorship
Others
Funding Project
Australian Research Council Centre of Excellence for Quantum Computation and Communication Technology[CE170100012] ; US Army Research Office[W911NF-17-1-0202]
WOS Research Area
Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS Subject
Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS Accession No
WOS:000891968000001
Publisher
ESI Research Field
MATERIALS SCIENCE
Data Source
Web of Science
Citation statistics
Cited Times [WOS]:0
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/417071
DepartmentInstitute for Quantum Science and Engineering
Affiliation
1.Univ New South Wales, Ctr Excellence Quantum Computat & Commun Technol, Sch Phys, Sydney, NSW 2052, Australia
2.UNSW, Silicon Quantum Comp Pty Ltd, Sydney 2052, Australia
3.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
Recommended Citation
GB/T 7714
Kranz, Ludwik,Gorman, Samuel K.,Thorgrimsson, Brandur,et al. The Use of Exchange Coupled Atom Qubits as Atomic-Scale Magnetic Field Sensors[J]. ADVANCED MATERIALS,2022.
APA
Kranz, Ludwik.,Gorman, Samuel K..,Thorgrimsson, Brandur.,Monir, Serajum.,He, Yu.,...&Simmons, Michelle Y..(2022).The Use of Exchange Coupled Atom Qubits as Atomic-Scale Magnetic Field Sensors.ADVANCED MATERIALS.
MLA
Kranz, Ludwik,et al."The Use of Exchange Coupled Atom Qubits as Atomic-Scale Magnetic Field Sensors".ADVANCED MATERIALS (2022).
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