H2020Индивидуална стипендия2017–2019

ROSETTA · Robust self-testing with applications to device-independent cryptography

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2017-03-01 → 2019-02-28
Финансиране от ЕС: 200 195 €
Участници: 1
Схема: MSCA-IF

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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

Robust self-testing with applications to device-independent cryptography

"Quantum technologies is a new branch of the information industry which promises significant advantages over the standard (classical) information processing technologies in terms of, for instance, computational power or security. One of the major challenges is to manufacture and control quantum devices of increasing power and complexity and devising efficient and robust testing procedures is a necessary step towards that goal. In this project we have focused on designing new testing procedures for quantum devices which can be applied under minimal assumptions (the so-called ""device-independent"" model). These procedures are based on the fact that quantum systems can exhibit stronger correlations than classical systems and these correlations can be directly observed in an experiment, a phenomenon known as Bell nonlocality. This is precisely what we use to certify the quantumness nature of the devices. The overarching goal of our research is to provide procedures that allow us to certify any quantum device that might be useful from the practical point of view. In particular, this includes highly complex devices consisting of many qubits (qubit is the quantum equivalent of a bit, a classical unit of information/memory) as well as devices correlated with multiple other devices. Our procedures have already been used to certify quantum devices and we are actively encouraging experimental groups to take advantage of them. This will allow them to improve the design and manufacturing process which in the long-term will speed up the development of powerful and useful quantum devices. Once these are available we can use them to build a quantum computer (superior computational power) or connect them in a network (the ""quantum internet"") to provide safer and more efficient communication."

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

Цел на проекта

The quantum revolution is happening now. Every day experimentalists around the world produce more complex, reliable and powerful quantum devices which take us one step closer to quantum computation, communication and cryptography. Testing is a crucial part of the development process necessary to ensure suitability of the device for the application in mind. Methods used for small devices quickly become impractical, as the devices become more complex and we need to develop efficient and robust testing procedures in order to make further progress. Fortunately, quantum physics is well-suited for this task, as it allows to precisely characterise devices under surprisingly weak assumptions. This feature, known as self-testing, is intrinsically related to the fundamental concept of Bell inequalities. The goal of this proposal is to develop efficient and robust testing procedures for complex quantum devices based on Bell's theorem. In the short-term these will allow experimentalists to efficiently characterise their devices, while in the long-term they will enable a customer to certify that a newly bought quantum device adheres to the specification, which opens the door to device-independent information processing. The timeliness of this proposal is demonstrated by the fact that the first loophole-free Bell experiments were reported within the last year. On top of practical applications, self-testing is important from the foundational point of view. By exploring the intimate connection between the quantum (microscopic) world of Hilbert spaces and the classical (macroscopic) world of resulting probability distributions, it provides the unique link between what we see and what is happening at the quantum level. This fellowship will allow Jędrzej Kaniewski to work under the supervision of Matthias Christandl (a world-class expert on quantum correlations) at the University of Copenhagen (a leading institution in both theoretical and experimental aspects of quantum mechanics).

Оригинален текст от CORDIS (на английски).

Участници

KOBENHAVNS UNIVERSITET · KOBENHAVNКоординаторДания