Robust and Resource-Efficient Microwave Near-Field Entangling ^{9}Be^{+} Gate

authored by

G. Zarantonello, H. Hahn, M. Schulte, A. Bautista-Salvador, R. F. Werner, K. Hammerer, C. Ospelkaus, J. Morgner

Abstract

Microwave trapped-ion quantum logic gates avoid spontaneous emission as a fundamental source of decoherence. However, microwave two-qubit gates are still slower than laser-induced gates and hence more sensitive to fluctuations and noise of the motional mode frequency. We propose and implement amplitude-shaped gate drives to obtain resilience to such frequency changes without increasing the pulse energy per gate operation. We demonstrate the resilience by noise injection during a two-qubit entangling gate with ^{9}Be^{+} ion qubits. In the absence of injected noise, amplitude modulation gives an operation infidelity in the 10^{-3} range.

Organisation(s)

Institute of Quantum Optics
Institute of Theoretical Physics
Laboratory of Nano and Quantum Engineering
QuantumFrontiers
CRC 1227 Designed Quantum States of Matter (DQ-mat)

External Organisation(s)

Physikalisch-Technische Bundesanstalt PTB

Type

Article

Journal

Physical review letters

Volume

123

ISSN

0031-9007

Publication date

31.12.2019

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

General Physics and Astronomy

Electronic version(s)

https://doi.org/10.48550/arXiv.1911.03954 (Access: Open)
https://doi.org/10.1103/PhysRevLett.123.260503 (Access: Closed)