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TITAN: A Fast and Distributed Large-Scale Trapped-Ion NISQ Computer

Published: 07 November 2024 Publication History

Abstract

Trapped-Ion (TI) technology offers potential breakthroughs for Noisy Intermediate Scale Quantum (NISQ) computing. TI qubits offer extended coherence times and high gate fidelity, making them appealing for large-scale NISQ computers. Constructing such computers demands a distributed architecture connecting Quantum Charge Coupled Devices (QCCDs) via quantum matter-links and photonic switches. However, current distributed TI NISQ computers face hardware and system challenges. Entangling qubits across a photonic switch introduces significant latency, while existing compilers generate suboptimal mappings due to their unawareness of the interconnection topology. In this paper, we introduce TITAN, a large-scale distributed TI NISQ computer, which employs an innovative photonic interconnection design to reduce entanglement latency and an advanced partitioning and mapping algorithm to optimize matter-link communications. Our evaluations show that TITAN greatly enhances quantum application performance by 56.6% and fidelity by 19.7% compared to existing systems.

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      cover image ACM Conferences
      DAC '24: Proceedings of the 61st ACM/IEEE Design Automation Conference
      June 2024
      2159 pages
      ISBN:9798400706011
      DOI:10.1145/3649329
      Publication rights licensed to ACM. ACM acknowledges that this contribution was authored or co-authored by an employee, contractor or affiliate of the United States government. As such, the Government retains a nonexclusive, royalty-free right to publish or reproduce this article, or to allow others to do so, for Government purposes only.

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      Published: 07 November 2024

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      Author Tags

      1. trapped ions
      2. NISQ
      3. distributed quantum computers

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      DAC '24: 61st ACM/IEEE Design Automation Conference
      June 23 - 27, 2024
      CA, San Francisco, USA

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