Robert Niffenegger
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bobnifty.bsky.social
Robert Niffenegger
@bobnifty.bsky.social
Asst. Prof. UMass Amherst
Trapped Ion Quantum Computing
https://websites.umass.edu/rniffenegger/

My Quantum Computing Course:
https://github.com/UMassIonTrappers/Introduction-to-Quantum-Computing
I'm posting my Intro to Quantum Computing Course on Github this year.

github.com/UMassIonTrap...

13 interactive Colabs
16 recorded lecture (so far)
70 pages of 'Goodnotes'

Focus is visual and interactive learning of how qubits work (eg. RWA below)

Hope it's helpful!
I'll post updates as we go!
March 10, 2025 at 7:17 PM
PSA reminder to stop talking about Majorana’s and start talking about how real qubit’s are surpassing the ppm error threshold… arxiv.org/abs/2412.04421
Single-qubit gates with errors at the $10^{-7}$ level
We report the achievement of single-qubit gates with sub-part-per-million error rates, in a trapped-ion $^{43}$Ca$^{+}$ hyperfine clock qubit. We explore the speed/fidelity trade-off for gate times $4...
arxiv.org
February 23, 2025 at 1:33 AM
I am excited to share our newest preprint:
"Qubit operations using a modular optical system engineered with PyOpticL: a code-to-CAD optical layout tool" - arxiv.org/abs/2501.14957

PyOpticL repo on Github - github.com/UMassIonTrap...
Qubit operations using a modular optical system engineered with PyOpticL: a code-to-CAD optical layout tool
Complex optical design is hindered by conventional piecewise setup, which prevents modularization and therefore abstraction of subsystems at the circuit level. This limits multiple fields that require...
arxiv.org
February 4, 2025 at 1:47 PM