Squeezing, trisqueezing, and quadsqueezing in a spin-oscillator system
(2024)
Breaking the entangling gate speed limit for trapped-ion qubits using a phase-stable standing wave
Physical Review Letters American Physical Society 131:22 (2023) 220601
Abstract:
All laser-driven entangling operations for trapped-ion qubits have hitherto been performed without control of the optical phase of the light field, which precludes independent tuning of the carrier and motional coupling. By placing 88Sr+ ions in a λ=674  nm standing wave, whose relative position is controlled to ≈λ/100, we suppress the carrier coupling by a factor of 18, while coherently enhancing the spin-motion coupling. We experimentally demonstrate that the off-resonant carrier coupling imposes a speed limit for conventional traveling-wave Mølmer-Sørensen gates; we use the standing wave to surpass this limit and achieve a gate duration of 15  μs, restricted by the available laser power.Non-commuting dynamics in light-ion-interactions in an ion trap system
Morressier (2023)
Standing-wave Mølmer-Sørensen gates on a quadrupole transition*
Morressier (2023)
Synthetic $\mathbb{Z}_2$ gauge theories based on parametric excitations of trapped ions
(2023)