Journal Article

FZJ-2021-02741

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Crosstalk Suppression for Fault-tolerant Quantum Error Correction with Trapped Ions

Parrado-Rodríguez, P. ; Ryan-Anderson, C. ; Bermudez, A. ; Müller, M. (Corresponding author)FZJ*

2021
Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften Wien

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Please use a persistent id in citations: http://hdl.handle.net/2128/28042  doi:10.22331/q-2021-06-29-487

Abstract: Physical qubits in experimental quantum information processors are inevitably exposed to different sources of noise and imperfections, which lead to errors that typically accumulate hindering our ability to perform long computations reliably. Progress towards scalable and robust quantum computation relies on exploiting quantum error correction (QEC) to actively battle these undesired effects. In this work, we present a comprehensive study of crosstalk errors in a quantum-computing architecture based on a single string of ions confined by a radio-frequency trap, and manipulated by individually-addressed laser beams. This type of errors affects spectator qubits that, ideally, should remain unaltered during the application of single- and two-qubit quantum gates addressed at a different set of active qubits. We microscopically model crosstalk errors from first principles and present a detailed study showing the importance of using a coherent vs incoherent error modelling and, moreover, discuss strategies to actively suppress this crosstalk at the gate level. Finally, we study the impact of residual crosstalk errors on the performance of fault-tolerant QEC numerically, identifying the experimental target values that need to be achieved in near-term trapped-ion experiments to reach the break-even point for beneficial QEC with low-distance topological codes.

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Contributing Institute(s):

1. Theoretische Nanoelektronik (PGI-2)

Research Program(s):

1. 5224 - Quantum Networking (POF4-522) (POF4-522)

Appears in the scientific report 2021

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; ; ; Article Processing Charges ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; Essential Science Indicators ; Fees ; IF < 5 ; JCR ; Science Citation Index Expanded ; Web of Science Core Collection

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