736 citations · 1k across the 9 of their papers we have counts for
10 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…
Entangling ions with engineered light gradients
Tommaso Faorlin, Lorenz Panzl, Phoebe Grosser +12
Spectral crowding of collective motional modes limits the fidelity of entangling interactions in trapped-ion quantum processors by inducing off-resonant coupling to spectator modes…
Robust certification of non-projective measurements: theory and experiment
Raphael Brinster, Peter Tirler, Shishir Khandelwal +7
Determining the conditions under which positive operator-valued measures (POVMs), the most general class of quantum measurements, outperform projective measurements remains a chall…
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…
Ultra-fast two-qubit ion gate using sequences of resonant pulses
E. Torrontegui, D. Heinrich, M. I. Hussain +2
We propose a new protocol to implement ultra-fast two-qubit phase gates with trapped ions using spin-dependent kicks induced by resonant transitions. By only optimizing the allocat…