Mr. Paul Méhaignerie Profile

Paul Méhaignerie

at Lab Kastler Brossel

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Proceedings Article | 30 March 2020 Presentation

Towards quantum simulations with circular Rydberg atoms (Conference Presentation)

Clément Sayrin, Rodrigo Cortiñas, Brice Ravon, Paul Méhaignerie, Maxime Favier, Jean-Michel Raimond, Yohann Machu, Michel Brune

Proceedings Volume 11347, 1134707 (2020) https://doi.org/10.1117/12.2554889

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We propose a novel platform for the realisation of quantum simulations of spin arrays, providing unprecedented flexibility and allowing one to explore regimes beyond the reach of other platforms. It is based on laser-trapped circular Rydberg levels. The strong van der Waals interaction between the atoms emulates a spin-1/2 XXZ Hamiltonian. All its parameters are experimentally and dynamically tunable over a wide range. A spontaneous-emission inhibiting structure extends the lifetime of individual laser-trapped circular Rydberg atoms to the minute range. Quantum simulations over more than $10^4$ interaction cycles are thus within reach. This enables the observation of adiabatic evolutions through quantum phase transitions, of sudden quenches, and fast modulations of the interaction parameters. After I present the key features of this simulator, I will focus on our latest experimental results regarding the preparation and manipulation of laser-cooled circular Rydberg atoms in the vicinity of an atomchip in an optical-access 4K-cryostat. Lifetime measurements reveal a below-10K microwave blackbody temperature, while Ramsey interferometry shows coherence times solely limited by magnetic field noise. I will finally present our latest results on laser-trapping of circular Rydberg atoms, a decisive step towards the realisation of the proposed quantum simulator.

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