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dc.contributor.author
Flannery, Jeremy
dc.contributor.author
Matt, Roland
dc.contributor.author
Huber, Luca
dc.contributor.author
Oswald, Robin
dc.contributor.author
Wang, Kaizhao
dc.contributor.author
Home, Jonathan
dc.date.accessioned
2023-01-25T15:04:38Z
dc.date.available
2023-01-08T10:23:06Z
dc.date.available
2023-01-25T15:04:38Z
dc.date.issued
2022
dc.identifier.isbn
978-1-6654-9113-6
en_US
dc.identifier.isbn
978-1-6654-9114-3
en_US
dc.identifier.other
10.1109/QCE53715.2022.00129
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/590832
dc.description.abstract
We present an experimental realization of coherent crosstalk cancellation in a trapped ion cryogenic system. The qubit register consists of a linear string of calcium ions which are individually addressed using tightly focused laser beams oriented perpendicular to the crystal axis. This individual control is provided by a multi-core photonic crystal fiber that allow for cancellation pulses to be applied to neighbouring ion sites to destructively interfere with crosstalk from addressing pulses on target qubits. With this technique we find > 10⁴ fold reduction in intensity crosstalk.In order for this novel method of crosstalk elimination to be stable, phase coherence must be preserved between the cancellation and addressing beams. We further develop the appropriate calibration methods and procedures to mitigate phase drifts between these different optical paths. This includes a method to minimize the effects of variable duty cycles of individual pulses that may cause for differential phase noise.In addition, we extended this work by including the results a laser written waveguide array used to provide single-ion addressing capability, which is found to produce intensity crosstalk on the order of 10⁻⁴. This device may be used in combination with the approach of optical cancellation developed for crosstalk compensation to result in negligible crosstalk errors between neighbouring qubit. As a consequence, such a system may allow for quantum error correction and fault-tolerant circuits to be viable as the system scales up to larger numbers of qubits.
en_US
dc.language.iso
en
en_US
dc.publisher
IEEE
en_US
dc.subject
Crosstalk
en_US
dc.subject
Trapped-ion
en_US
dc.subject
Quantum Computing
en_US
dc.title
Optical Crosstalk Mitigation for Individual Addressing in a Cryogenic Ion Trap
en_US
dc.type
Conference Paper
dc.date.published
2022-11-22
ethz.book.title
2022 IEEE International Conference on Quantum Computing and Engineering (QCE)
en_US
ethz.pages.start
816
en_US
ethz.pages.end
817
en_US
ethz.event
3rd IEEE International Conference on Quantum Computing and Engineering (QCE 2022)
en_US
ethz.event.location
Broomfield, CO, USA
en_US
ethz.event.date
September 18-23, 2022
en_US
ethz.identifier.wos
ethz.publication.place
Piscataway, NJ
en_US
ethz.publication.status
published
en_US
ethz.date.deposited
2023-01-08T10:23:12Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2023-01-25T15:04:39Z
ethz.rosetta.lastUpdated
2023-01-25T15:04:39Z
ethz.rosetta.versionExported
true
ethz.COinS
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