Fast and Scalable Quantum Information Processing with Two-Electron Atoms in Optical Tweezer Arrays

Year: 2019

Authors: Pagano G., Scazza F., Foss-Feig M.

Autors Affiliation: Univ Maryland, Joint Quantum Inst, College Pk, MD 20742 USA; CNR, Ist Nazl Ott, I-50019 Sesto Fiorentino, Italy; Univ Firenze, LENS, I-50019 Sesto Fiorentino, Italy; Univ Firenze, Dipartimento Fis & Astron, I-50019 Sesto Fiorentino, Italy; US Army Res Lab, Adelphi, MD 20783 USA.

Abstract: Atomic systems, ranging from trapped ions to ultracold and Rydberg atoms, offer unprecedented control over both internal and external degrees of freedom at the single-particle level. They are considered among the foremost candidates for realizing quantum simulation and computation platforms that can outperform classical computers at specific tasks. In this work, a realistic experimental toolbox for quantum information processing with neutral alkaline-earth-like atoms in optical tweezer arrays is described. In particular, a comprehensive and scalable architecture based on a programmable array of alkaline-earth-like atoms is proposed, exploiting their electronic clock states as a precise and robust auxiliary degree of freedom, and thus allowing for efficient all-optical one- and two-qubit operations between nuclear spin qubits. The proposed platform promises excellent performance thanks to high-fidelity register initialization, rapid spin-exchange gates, and error detection in read-out. As a benchmark and application example, the expected fidelity of an increasing number of subsequent SWAP gates for optimal parameters is computed, which can be used to distribute entanglement between remote atoms within the array.

Journal/Review: ADVANCED QUANTUM TECHNOLOGIES

Volume: 2 (2-4)      Pages from: 1800067-1  to: 1800067-12

More Information: The authors would like to thank Marcello Dalmonte, Adam Kaufman, Leonardo Fallani, and Jeff Thompson for useful discussions and suggestions. G.P. is supported by the ARO and AFOSR Atomic and Molecular Physics Programs, the AFOSR MURI on Quantum Measurement and Verification, the IARPA LogiQ program, and the NSF Physics Frontier Center at JQI. F.S. acknowledges support from the European Union H2020 Marie Sklodowska-Curie program (grant no. 705269).
KeyWords: neutral atom quantum computing; optical tweezer arrays; quantum gates; two-electron atoms
DOI: 10.1002/qute.201800067

Citations: 20
data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-10-27
References taken from IsiWeb of Knowledge: (subscribers only)
Connecting to view paper tab on IsiWeb: Click here
Connecting to view citations from IsiWeb: Click here