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

TL;DR

T TITAN is introduced, 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.

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.

Figures (9)

• Figure 1: The basics of TI technology, a trap, a QCCD, a module, and a distributed architecture.
• Figure 2: Prior compilers on a distributed TI NISQ computer.
• Figure 3: Adding more ports for larger entanglement attempt concurrency in an entanglement.
• Figure 4: The photonic interconnection in TITAN.
• Figure 5: The compiler design for TITAN comprising distributed TI modules interconnected by a photonic switch.