TopSpiD · Topological states with Spin-Dependent potentials for ultracold lithium
„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“
- Период
- 2018-07-01 → 2020-06-30
- Финансиране от ЕС
- 175 420 €
- Участници
- 1
- Схема
- MSCA-IF
Линиите свързват координатора с партньорите.
Накратко на български
Топологичните възбуждания, като например фермионите на Майорана, се изследват чрез използването на ултрастудени атоми на литий. Създаването им може да помогне за развитието на защитени топологични квантови изчисления.
Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.
Резултати накратко
Topological states with Spin-Dependent potentials for ultracold lithium
Majorana fermions are a type of fermions that is its own antiparticle. They exhibit non-trivial braiding properties. Producing such excitations is an important challenge of experimental physics since it is predicted to allow for protected topological quantum computing. While particles with such a statistics have not yet been found, the existence of excitations of strongly correlated systems with the same properties as Majorana Fermions has been predicted. This project was aimed at creating topological excitations such as Majorana Fermions on an ultracold atom experimental setup suited for studying transport phenomena. This task is bound to be challenging for an ultracold atom experiment because one needs both a fermionic superfluid and implement a spin-orbit coupling mechanism. While the former is easily achieved for lithium 6 atoms thanks to its broad Feshbach resonance, the latter is more involved since the small fine structure splitting leads to increased heating when using near-resonant light beams. In the course of this fellowship, several steps have been taken to produce this kind of excitations.
Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз
Цел на проекта
The recent understanding of the topological properties of matter has led to the search for the experimental production and control of topological excitations such as Majorana fermions. They appear at the boundary between a topological superconductor and a normal metal and have intriguing properties such as non-abelian exchange statistics and insensitivity to decoherence. Their production would give an invaluable insight on the properties of topological phases of matter as well as paving the way towards fault-tolerant quantum computing. The aim of this action is to create them in an ultracold atom set-up which is a ideal platform to engineer interesting Hamiltonians.We propose to create such excitations by combining effective spin-orbit coupling with superfluid properties. We will use near-resonant light which has led to the successful implementation of artificial magnetic fields and spin-orbit coupling in ultracold atoms. We want to produce the latter coupling while limiting the associated heating due to spontaneous emission: the key idea is to shine the near-resonant beams on a very small region, where spontaneous emission leads to losses but not to heating.We already have an apparatus able to realize the atomic equivalent of a quantum point contact. In this project, the experienced researcher, already expert in ultracold atom techniques, will lead the experimental team effort. As intermediate results, we will study the flow of atoms through “atomtronics” light structures, implement a cooling scheme using such an atomtronic device and understand the effect of increased losses in the channel on transport.The combination of these new potentials with superfluid behaviour for ultracold atoms leads to the implementation of the Kitaev model that bears the highly sought Majorana excitations, and detection will take advantage of easily accessible transport observables. The atomtronics techniques developed would open wide perspectives for future studies.
Оригинален текст от CORDIS (на английски).
Участници
- EIDGENOESSISCHE TECHNISCHE HOCHSCHULE ZUERICH · ZuerichКоординаторШвейцария
Връзки
Данни: CORDIS, © Европейски съюз