HQS · Hybrid Quantum Systems - Integrating Atomic/Molecular and Solid Sate Quantum Systems
7РП — „Хора“ (Действия „Мария Кюри“)
- Период
- 2008-09-01 → 2010-08-31
- Финансиране от ЕС
- 163 018 €
- Участници
- 1
- Схема
- MC-IEF
Линиите свързват координатора с партньорите.
Накратко на български
Хибридните квантови системи обединяват ултрастудени атоми със свръхпроводящи устройства, за да се постигне силна връзка между тях. Това помага за развитието на нови технологии за управление на информацията чрез светлинни импулси и специални резонатори.
Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.
Резултати накратко
Hybrid Quantum Systems - integrating atomic/molecular and solid state quantum systems
The goal of the HQS project fellowship of Dr Majer was to combine different quantum technologies in order to realise hybrid quantum systems (HQS). In particular, the aim of the project was to combine ultracold atoms with superconducting devices. The role of Dr Majer was to introduce and establish the solid state physics and combine it with the technology of ultracold atoms which existed at the Technical University of Vienna. At the beginning of the project we finalised our proposal and showed that an ensemble of ultracold atoms could be coupled to a superconducting transmission line resonator and that the system reached the strong coupling regime. Furthermore, we analysed strategies to increase the coupling strength and found, in collaboration with the group of G. Kurizki, that the coupling was enhanced by optically excited Rydberg states. In parallel, Dr Majer made progress towards the experimental realisation of the proposal. He purchased and installed a dilution refrigerator system which allowed for the measurement of superconducting devices. Furthermore, he initiated the fabrication of superconducting resonators at the micro-fabrication facility of the Technical University of Vienna. The resonators were measured in the dilution refrigerator and showed quality factors up to a million, which was among the highest reached with this technology. In addition, the properties of the resonators with light impinging on the resonator were tested and provided significant information for the proposals relying on the manipulation with light pulses. For the realisation of a cryogenic atom chip experiment, an electron beam driven alkali atom source was demonstrated. However, an alternative path was chosen, which implied a magnetic conveyor belt transport from a magneto-optical trap into a cryostat. For experimental simplicity, a 4 K fridge was installed. Since the resonator at 4 K was occupied with thermal photons, the coupling of atoms to a superconducting resonator at finite temperature was studied, in collaboration with the University of Innsbruck. Theoretically, we demonstrated that a strong coupling was possible even at finite temperatures. Dr Majer also investigated alternative systems for the realisation of hybrid quantum systems. He initiated an experimental effort to measure nitrogen-vacancy colour centres in diamond. He coupled a diamond to a superconducting resonator and showed that with this hybrid quantum system an ensemble of nitrogen-vacancy spins could strongly couple to the superconducting resonator.
Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз
Цел на проекта
Quantum physics is fundamental for our understanding of nature, and consequently at the centre of the development of new methods and technologies. In recent years it became evident that quantum physics in itself can have fare reaching implications. A robust technological implementation of quantum physics has the potential to be one of the defining technologies of the 21st century. Presently quantum physics is confined to its separate worlds. For quantum physics to emerge from fundamental research, one of the main challenges is how to link different quantum systems to each other and preserve the quantum nature also over the link. One has to be able to quantum interconnect the different domains. A robust technological basis for this is currently not available. The objective of the present proposal is to bring together all the fantastic possibilities of QIPC with a cooper pair box and circuit CQED (transmon physics) with the physics to cool and trap and control atoms/molecules. All together will be integrated in a hybrid device by adapting the AtomChip concept to the environment of the Solid State QIPC. Our first approach will be to use the near field enhancement in high finesse strip line MW resonators of circuit CQED to couple single MW photons to collective excitations in the trapped atomic clouds, thereby establishing a quantum interconnect between solid state quantum device and an atomic ensemble acting as a quantum memory. Our research towards this ambitious goal will establish the scientific and technological foundations of a new class of instruments, a hybride quantum processor. By connecting the fast processing in a solid sate device to the exceptional long coherence times in an atomic/molecular system as a quantum memory will add essential features, presently missing in existing QIPC implementations.
Оригинален текст от CORDIS (на английски).
Участници
- TECHNISCHE UNIVERSITAET WIEN · WienКоординаторАвстрия
Връзки
Данни: CORDIS, © Европейски съюз