Valahu_2021_New_J._Phys. - W Hensinger.pdf (2.67 MB)
Robust entanglement by continuous dynamical decoupling of the J-coupling interaction
journal contribution
posted on 2023-06-10, 02:01 authored by Christophe Valahu, A M Lawrence, Sebastian WeidtSebastian Weidt, Winfried HensingerWinfried HensingerWe propose a sz? szlaser-free entangling gate which uses the intrinsic J-coupling of ions in a static magnetic gradient. Dephasing of the interaction is suppressed by means of continuous dynamical decoupling using pairs of microwave fields. The gate is virtually insensitive to common amplitude noise of the microwave fields and enables high fidelities despite qubit frequency fluctuations, while the J-coupling interaction's inherent robustness to motional decoherence is retained. Errors far below the fault-tolerant threshold can be achieved at high initial temperatures, negating the requirement of sideband cooling below the Doppler temperature. By adjusting the powers of the continuous microwave fields, the J-coupling interaction can be tuned and can be used to implement parallel entangling gates within an ion chain.
History
Publication status
- Published
File Version
- Published version
Journal
New Journal of PhysicsISSN
1367-2630Publisher
IOP PublishingExternal DOI
Issue
11Volume
23Page range
1-21Article number
a113012Department affiliated with
- Physics and Astronomy Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2021-12-16First Open Access (FOA) Date
2021-12-16First Compliant Deposit (FCD) Date
2021-12-15Usage metrics
Categories
No categories selectedKeywords
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC