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Fermionic Fractional Quantum Hall Systems under the Microscope

Project description

A new era in quantum simulation

The fractional quantum Hall (FQH) effect is a unique quantum phenomenon where electrons, when exposed to extreme conditions such as very low temperatures and strong magnetic fields, form new types of matter with special properties that could be useful for quantum technologies. However, studying FQH states in traditional materials like semiconductors, where electrons move through a fixed structure is difficult. With the support of the Marie Skłodowska-Curie Actions programme, the FQHMicroscope project aims to study fermionic FQH states using a cutting-edge quantum gas microscope, a tool that allows researchers to see and manipulate individual atoms. Researchers aim to push the boundaries of quantum simulation and provide a new way to study topological physics with unprecedented precision.

Objective

Fractional quantum Hall (FQH) states are paradigmatic examples of strongly correlated topological quantum matter, combining geometric order and strong interparticle interactions. Yet, limited microscopic control in solid-state platforms often restricts observations to global current or spectroscopy probes. Engineered quantum systems, such as ultracold atoms in optical lattices, offer a complementary route for exploring topological order leveraging precise control over Hamiltonian parameters and access to local observables through quantum gas microscopy.

The primary goal of this project is to prepare and probe quantum-engineered fermionic FQH states for the first time in a next-generation quantum gas microscope. First, we will implement direct laser cooling of fermionic Li-6 atoms to efficiently prepare individual atoms in the ground state of optical tweezers, and holographically project lattice potentials to assemble Fermi-Hubbard systems atom by atom. To explore FQH physics, we will implement small fermionic Harper-Hofstadter systems via Floquet engineering. Leveraging our system’s excellent coherence, we will extend observations beyond two particles and perform first observations fractionally charged quasi-hole excitations pinned by local repulsive potentials. To access a broader class of fermionic FQH states, we will build upon recent advances in multi-orbital lattices and engineer p-wave interactions between pairs of spinless fermions. This approach will facilitate first microscopic studies of exotic Pfaffian states.

Our results will significantly impact research in quantum simulation and topological physics. Technically, we will advance programmable optical lattices, enabling sub-second cycle times and unprecedented levels of control in quantum gas microscopes. Implementing p-wave interactions will facilitate the exploration of Pfaffian states and non-Abelian excitations, which are building blocks for fault-tolerant topological quantum computing.

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HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships

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Call for proposal

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(opens in new window) HORIZON-MSCA-2024-PF-01

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Coordinator

INSTITUTE OF SCIENCE AND TECHNOLOGY AUSTRIA
Net EU contribution

Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.

€ 214 344,72
Address
Am Campus 1
3400 Klosterneuburg
Austria

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Region
Ostösterreich Niederösterreich Wiener Umland/Nordteil
Activity type
Higher or Secondary Education Establishments
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Total cost

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