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Ponente: Prof. Antoine Browaeys (Laboratoire Charles Fabry, Université Paris-Saclay, CNRS, Francia)
Título: Assembling quantum matter one atom at a time
Lugar: Seminario del Dpto de Física Atómica, Molecular y Nuclear en la Facultad de Ciencias.
Fecha: 20 de Mayo 2025, a las 12:30.
Organizan:
Dpto. de Física Atómica, Molecular y Nuclear
Sección Local de la Real Sociedad de Española de Física en Granada
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Rosario González Férez
Dpto de Física Atómica, Molecular y Nuclear
Facultad de Ciencias
Universidad de Granada
Granada, Spain
Resumen:
Over the last twenty years, physicists have learned to manipulate individual quantum objects: atoms, ions, molecules, quantum circuits, electronic spins... It is now possible to build "atom by atom" a synthetic quantum matter. By controlling the interactions between atoms, one can study the properties of these elementary many-body systems: quantum magnetism, transport of excitations, superconductivity... and thus understand more deeply the N-body problem. More recently, it was realized that these quantum machines may find applications in the industry, such as finding the solution of combinatorial optimization problems.
This seminar will present an example of a synthetic quantum system, based on laser-cooled ensembles of individual atoms trapped in microscopic optical tweezer arrays. By exciting the atoms into Rydberg states, we make them interact, even at distances of more than ten micrometers. In this way, we study the magnetic properties of an ensemble of more than a hundred interacting ½ spins, in a regime in which simulations by usual numerical methods are already very challenging. Some aspects of this research led to the creation of a startup, Pasqal. _______________________________________________
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