Issue 9, 2023

Two-qubit atomic gates: spatio-temporal control of Rydberg interaction

Abstract

By controlling the temporal and spatial features of light, we propose a novel protocol to prepare two-qubit entangling gates on atoms trapped at close distance, which could potentially speed up the operation of the gate from the sub-micro to the nanosecond scale. The protocol is robust to variations in the pulse areas and the position of the atoms, by virtue of the coherent properties of a dark state, which is used to drive the population through Rydberg states. From the time-domain perspective, the protocol generalizes the one proposed by Jaksch and coworkers [Jaksch et al., Phys. Rev. Lett., 2000, 85, 2208], with three pulses that operate symmetrically in time, but with different pulse areas. From the spatial-domain perspective, it uses structured light. We analyze the map of the gate fidelity, which forms rotated and distorted lattices in the solution space. Finally, we study the effect of an additional qubit to the gate performance and propose generalizations that operate with multi-pulse sequences.

Graphical abstract: Two-qubit atomic gates: spatio-temporal control of Rydberg interaction

Article information

Article type
Paper
Submitted
09 Sep 2022
Accepted
23 Jan 2023
First published
27 Jan 2023
This article is Open Access
Creative Commons BY-NC license

Nanoscale, 2023,15, 4325-4333

Two-qubit atomic gates: spatio-temporal control of Rydberg interaction

I. R. Sola, V. S. Malinovsky, J. Ahn, S. Shin and B. Y. Chang, Nanoscale, 2023, 15, 4325 DOI: 10.1039/D2NR04964C

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