An international collaboration between a French quantum startup and a major Taiwanese electronics manufacturer has yielded a new open-source tool for exploring a critical area of quantum computing. Quobly and Taiwan’s Hon Hai Research Institute, the R&D arm of Foxconn, jointly released a numerical toolbox dedicated to the Quantum Phase Estimation (QPE) algorithm, described as a cornerstone of fault-tolerant quantum computing with major applications in quantum chemistry and materials science. While QPE’s theoretical benefits are understood, simulating its practical resource needs has proven difficult; the toolbox aims to bridge this gap by allowing researchers to explore implementations and their implications. The tool focuses on practical, interpretable numerical experiments, enabling full circuit executions for up to 20 qubits and circuits ranging from 1,000 to 100,000 gates on standard laptops.
Quantum Phase Estimation Toolbox for Molecular Systems
While the theoretical underpinnings of QPE are well established, simulating its practical demands has proven a significant hurdle, limiting exploration beyond simplified models. The toolbox addresses this gap by offering a platform for practical, interpretable numerical experiments, allowing scientists to investigate QPE implementations without requiring access to full-scale quantum hardware, which is currently unavailable. Built upon advanced tensor network techniques and the open-source quimb library, the toolbox facilitates the preparation of initial states using DMRG and matrix product states, and allows encoding of molecular Hamiltonians into quantum circuits through methods like trotterization and qubitization. Researchers can directly compare standard QPE with the single-ancilla Robust Phase Estimation (RPE) method, analyzing circuit depth, gate counts, and potential error sources.
Currently, the toolbox supports full circuit executions for approximately 20 qubits with circuits ranging from fewer than 1,000 to around 100,000 gates, and ground state preparation for systems up to 30 qubits, all achievable on a standard laptop within a reasonable timeframe. Thibaud Louvet, Quantum Algorithms Scientist at Quobly, explained that their goal is to provide a practical, numerical playground for QPE, one that helps researchers move beyond purely theoretical cost models and develop realistic intuition for fault-tolerant quantum algorithms. Min-Hsiu Hsieh, Director of the Quantum Computing Research Center at Hon Hai Research Institute, added that by combining quantum algorithms with advanced tensor-network techniques, this toolbox offers researchers a structured environment to explore and better understand the practical requirements of future quantum applications. This collaborative effort signifies a commitment to algorithm-hardware co-design and accelerating the path toward functional fault-tolerant quantum computing.
The pursuit of fault-tolerant quantum computing has long faced a critical bottleneck: the gap between theoretical promise and practical simulation. A new open-source toolbox developed through a collaboration between France’s Quobly and Taiwan’s Hon Hai Research Institute (Foxconn’s R&D arm) aims to address this challenge by leveraging advanced tensor network techniques.
By combining state-of-the-art quantum algorithms with advanced tensor-network techniques, this toolbox offers researchers a structured environment to explore and better understand the practical requirements of future quantum applications.
Min-Hsiu Hsieh, Director of the Quantum Computing Research Center at Hon Hai Research Institute
Source: https://www.quobly.io/
