2022/10/05 by Ruzic, Brandon P., Chow, Matthew N. H., Burch, Ashlyn D. +5
#FOS: Physical sciences #Quantum Physics (quant-ph)
paper · doi:10.48550/arxiv.2210.02372
In this work, we design and implement frequency-robust Molmer-Sorensen gates on a linear chain of trapped ions, using Gaussian amplitude modulation and a constant laser frequency. We select this frequency to balance the entanglement accumulation of all motional modes during the gate to produce a strong robustness to frequency error, even for long ion chains. We demonstrate this technique on a three-ion chain, achieving < 1% reduction from peak fidelity over a 20 kHz range of frequency offset, and we analyze the performance of this gate design through numerical simulations on chains of two to 33 ions.