H2020Индивидуална стипендия2018–2020

Hi-FrED · High-Frequency Spin Entanglement Generation in Diamond

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

Период: 2018-09-01 → 2020-08-31
Финансиране от ЕС: 187 420 €
Участници: 1
Схема: MSCA-IF-EF-ST

Линиите свързват координатора с партньорите.

Накратко на български

Азотните вакансии в диаманти се използват за създаване на връзка между отделни частици чрез светлина. Това помага за развитието на по-бързи квантови компютри и по-точни сензори.

Този кратък обзор е генериран от изкуствен интелект

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

Резултати накратко

High-Frequency Spin Entanglement Generation in Diamond

The nitrogen vacancy (NV) centers in diamond are optically active impurities in high-purity diamond crystals and feature optically addressable electron spin with outstanding coherence times up to hundreds of milliseconds even at room temperature together with robust single photon emission. A crucial issue is the lack of an efficient, high-fidelity spin-photon interface. This issue has severely limited the implementation of NV centers in quantum technologies. This project aimed to establish the NV center in thin diamond structures as optically-coherent and radically improve the open cavity platform that can host such diamond samples with the aim of generating high flux of indistinguishable photons. The overarching goal of these actions is the generation of high-frequency spin-spin entanglement in spatially separated NV centers in diamond. This contributes to the research areas of quantum computing and quantum sensors which enhances Europe's capabilities in quantum technologies and fosters its staying at the front of the 'second quantum revolution'.

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

Цел на проекта

This proposal promotes a research program in quantum nano-photonics to be carried out by dr T. Jakubczyk. It aimes at achieving high frequency of generation and detection of spin-spin entanglement in spatially separated nitrogen vacancy (NV) centers in diamond. While current photon collection efficiencies (few per cent) and entanglement rates (approx. one entanglement event per minute) may be sufficient for proof-of-principle experiments, they need to be greatly improved for the implementation of practical quantum networks.The project builts on a recent progress achieved in the host institution in the deterministic cavity-assisted enhancement of the coherent photon emission rate of NV centers embedded in a diamond membrane. The increase of the decay rate results in enhanced radiative efficiency and makes the emission robust against dephasing enhancing the photon indistinguishability and boosting the photon extraction efficiency. The aim of the project is to establish the NV center as spin- and optically- coherent, specifically by decreasing the linewidth broadening resulting from the minimal necessary processing of the diamond crystal and introducing significant improvements to the cavity. The estimated resulting spin-spin entanglement rates are in the Mhz-range. The projects opens new ways of studying complex and non-trivial phenomena resulting from the enhanced light-matter coupling in the NV center and in other quantum emitters. Success of this project may provide a route to the realisation of scalable quantum computers based on optical networks of electronic and nuclear spins.

Оригинален текст от CORDIS (на английски).

Участници

UNIVERSITAT BASEL · BaselКоординаторШвейцария