H2020Индивидуална стипендия2021–2023

ToPIKS · Topological P-wave superfluids with Isotopic K mixtureS

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

Период: 2021-04-01 → 2023-03-31
Финансиране от ЕС: 160 932 €
Участници: 1
Схема: MSCA-IF

Линиите свързват координатора с партньорите.

Накратко на български

Свойствата на свръхтечностите при ултрастудени смеси от калиеви атоми се изучават чрез създаване на специфични двойки частици. Тези процеси помагат за разработването на по-стабилни кубити за бъдещи квантови компютри.

Този кратък обзор е генериран от изкуствен интелект

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

Резултати накратко

Topological P-wave superfluids with Isotopic K mixtureS

Fermionic superfluidity and superconductivity are paradigmatic many-body phenomena arising at all energy scales in nature – from ultracold atoms to quarks. At the basis of these phenomena lies pairing between fermionic particles. If pairing happens between particles with non-zero relative angular momentum, the superfluid phase acquires unconventional features, as for the A phase in 3He or electrons in high-Tc superconductors. More specifically, p-wave pairing in 2D is expected to induce superfluid phases with non-trivial topological features, as chirality and anyonic vortex excitations with non-Abelian braiding statistics: the investigation of such topological properties within an ultracold atomic platform is the main goal of the project ToPIKS. The interest in p-wave topological superfluids is motivated by the fact that their anyonic excitations are the zero-magnetic field equivalent of non-Abelian anyonic excitations in 5/2 fractional quantum Hall systems, the unique systems where non-Abelian quasiparticles have been unarguably witnessed so far. The experimental realization of anyonic excitations with non-Abelian statistics under controllable conditions is a paramount goal of nowadays research, due to the promising practical application in quantum computing as fault-tolerant qubits. The high level of control over the system parameters, together with probing capabilities down to the single atom level, makes of ultracold atomic gases an ideal platform towards this achievement. The ToPIKS project activity is structured in three main sequential objectives: 1) The realization of ultracold isotopic mixtures of 40K and 39K potassium atoms; 2) The experimental investigation of the pairing mechanism with p-wave character predicted for such mixtures in 2D by the seminal work by B. Bazak and D. S. Petrov (Phys. Rev. Lett. 121, 263001 (2018)); 3) The realization and investigation of p-wave fermionic superfluids and their topological nature.

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

Цел на проекта

Topological P-wave superfluids with Isotopic K mixtureS:Pairing of fermions lies at the heart of superfluidity and superconductivity, paradigmatic many-body phenomena arising at all energy scales in Nature – from ultracold to Quark matter. In particular, pairing between fermions with non-zero angular momentum emerges as a key mechanism at the basis of a wealth of unconventional fermionic superfluids, as for the A phase in 3He or electrons in high-Tc superconductors. More specifically, p-wave pairing in 2D is expected to induce superfluid phases with non-trivial topological features, as chirality and anyonic vortex excitations with non-Abelian braiding statistics.The high level of control over the system parameters, together with detection and probing capabilities down to the single atom level, makes of ultracold atomic gases an ideal platform towards the realization and investigation of such paradigmatic yet elusive strongly interacting phases. Despite this, the experimental observation of p-wave superfluidity in atomic gases has never been achieved so far.ToPIKS plans to realize a 2D system with strong p-wave interactions in ultracold Bose-Fermi mixtures of 39K and 40K atoms, on the repulsive side of a Fose-Bose s-wave Feshbach resonance, where the system sustains a heteronuclear fermionic molecular state. The virtual exchange of the lighter 39K bosonic atoms between two 39K40K molecules will in turn induce an effective dimer-dimer p-wave attraction.The key novelty of this approach consists in the possibility to stabilize the system against inelastic losses by promoting a small but finite Bose-Bose repulsion. This is a striking advantage in comparison with previously existing systems exploiting homonuclear p-wave Feshbach resonances, intrinsically suffering from strong 3-body recombination. At the same time, the system maintains the high degree of controllability of atomic gases with Feshbach tunable interactions.

Оригинален текст от CORDIS (на английски).

Участници

FUNDACIO INSTITUT DE CIENCIES FOTONIQUES · CastelldefelsКоординаторИспания