18 citations · 45 across the 5 of their papers we have counts for
6 papers
Absolute frequency measurement of the Ca clock transition using a GNSS link to the SI second
M. Guevara-Bertsch, M. K. Joshi, M. I Hussain +2
We report the absolute frequency measurement of the Ca clock transition with respect to the SI second. To perform t…
Local robust shadows on a trapped ion computer -- a case study
Jadwiga Wilkens, Milena Guevara-Bertsch, Marwa Marso +6
We experimentally demonstrate local robust shadows on a trapped-ion quantum computing system, a protocol developed to counteract measurement errors. We alternate between a calibrat…
Single-ion optical autocorrelator
M. I. Hussain, M. Guevara-Bertsch, E. Torrontegui +3
Well isolated quantum systems are exquisite sensors of electromagnetic fields. In this work, we use a single trapped ion for characterizing chirped ultraviolet (UV) picosecond lase…
Multi-GHz repetition rate, multi-watt average power, ultraviolet laser pulses for fast trapped-ion entanglement operations
M. I. Hussain, D. Heinrich, M. Guevara-Bertsch +4
The conventional approach to perform two-qubit gate operations in trapped ions relies on exciting the ions on motional sidebands with laser light, which is an inherently slow proce…
Frequency measurement of the transition of Al via quantum logic spectroscopy with Ca
Michael Guggemos, Milena Guevara-Bertsch, Daniel Heinrich +4
We perform quantum logic spectroscopy with a Al/Ca mixed ion crystal in a linear Paul trap for a measurement of the $(3s^{2})\,^{1}\mathrm{S}_{0} \leftrig…
Ultrafast coherent excitation of a Ca ion
D. Heinrich, M. Guggemos, M. Guevara-Bertsch +3
Trapped ions are a well-studied and promising system for the realization of a scalable quantum computer. Faster quantum gates would greatly improve the applicability of such a syst…