HEИндивидуална стипендия2023–2025

QSPEED · Scalable quantum algorithms in highly noisy environments

„Хоризонт Европа“ — Действия „Мария Склодовска-Кюри“

Период: 2023-09-01 → 2025-08-31
Финансиране от ЕС: 139 954 €
Участници: 1
Схема: HORIZON-TMA-MSCA-PF-EF

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Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Scalable quantum algorithms in highly noisy environments

We are at the edge of the second quantum revolution. Its goal is to create technologies of which the working principle would strongly rely on fundamental quantum effects. Quantum computing, in particular, aims to exploit these effects to solve calculations that could sometimes take longer than the age of our universe to be solved on the best classical supercomputers available, this is called the quantum speedup. Its applications could potentially impact many fields: high tech, industry, chemistry, pharmacology, finance, energy, ... Unfortunately, to make quantum computers a reality, one needs to make them resilient to the unavoidable errors occuring within the algorithms. These errors are one of the main reasons why we do not have quantum computers able to outperform state-of-the-art classical computers to this date. The main approach to resist to errors is quantum error-correction. However, it is very costly in terms of resources: several qubits (quantum bits) are required to detect and correct these errors, and the errors should be sufficiently rare so that this technique works. The high cost of this approach, and the fact it requires demanding conditions on the hardware quality to work makes it very challenging to be implemented. Therefore, we need to find alternative, more efficient techniques to resist against errors. The overall objective of this project is exactly to fulfill this goal. More precisely, the goal is to find ways to design quantum algorithms that will be inherently resilient to errors, from the way they are built. More generally, the scope of this project is to find ways to better resist the noise in quantum information processing tasks.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

Quantum computers bring the promise of solving efficiently problems that would take a considerable amount of time on the best classical computers. This is called the quantum speedup. However, an experimental proof of a quantum speedup on a problem useful for society remains to be shown. One of the main issues preventing it to occur is the noise: the hardware is too noisy which makes the algorithms outputs unreliable. These algorithms are usually designed under the assumption that the qubits are perfect, and the errors are corrected or mitigated “afterwards”. However, mitigation techniques are typically not scalable (they stop working if the algorithm is too large). Quantum error correction is scalable but very challenging to implement as it requires very high quality qubits. This project aims to design quantum algorithms that, by construction, would efficiently work in highly noisy regimes, because of a noise-aware design without the need for error correction or error mitigation techniques. Our first objective will be to see if it is possible to carefully design quantum algorithms (by looking at how errors propagate in the circuits) for which the consequences of the noise will be that the experimentalist has only to re-run the algorithm a polynomial number of times, naturally preserving any exponential speedup. Our second objective will be to study the possibility to design algorithms operating on mixed-states that do not introduce any entanglement but nonetheless provide an exponential speedup. Because such algorithms would work with mixed-states without entanglement, they could also lead to interesting noise-resilience properties. For both of our objectives, we will aim to find useful applications for our algorithms, beyond the mere proof of concepts. Overall, our project could lead to a new class of quantum algorithms, noise-resilient from their very design, and would provide fundamental insights on the necessary ingredients allowing a speedup to occur.

Оригинален текст от CORDIS (на английски).

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