Simulating quantum Hall physics with ultracold atoms
| Quand ? |
Le 02/10/2023, de 11:00 à 12:00 |
|---|---|
| Où ? | Salle des Thèses |
| Participants |
Sylvain Nascimbene |
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Ultracold atomic gases can be used to study a wide range of phenomena relevant to quantum matter, such as superfluidity or magnetism. The simulation of an orbital magnetic field, which plays a crucial role in the quantum Hall effect, remains challenging in systems of neutral atoms.In this talk, I will present an experimental realization of a quantum Hall system using ultracold gases of dysprosium atoms. We use the large spin J = 8 of this atom to encode a synthetic dimension in the magnetic projection states m. We couple the spin to the atomic motion using two-photon optical transitions, which leads to an effective magnetic field. We measure characteristic features of the quantum Hall effect, namely a quantized Hall response and gapless chiral edge modes. I will finally discuss a recent experiment in which we studied the structure of entanglement in a quantum Hall system, by measuring the so-called entanglement Hamiltonian.