报告题目：Circular Rydberg Atoms for quantum simulations
报告人：Prof. Michel Brune
主持人：武海斌 教授
时间：2023年11月15日（周三）下午14:00
地点：光学大楼B325会议室
报告人简介：
Michel Brune, born in 1964 graduated at Ecole Normale Supérieure, from 1983 to 1987. He defended his Phd in 1988, supervised by S. Haroche, and his habilitation in 2001. He works in the Laboratoire Kastler Brossel at ENS. He is director of research (CNRS position) and professor at Ecole Polytecnique (partial time). He is director of the Jung Team Incubator at the Physics Institute of Collège de France. His scientific work, performed at laboratoire Kastler Brossel, is focused on experiments with simple and well-controlled quantum systems for exploring the most fundamental features of quantum theory. Michel Brune is presently leading the Cavity Quantum Electrodynamics located on Collège de France site of Laboratoire Kastler Brossel.
报告内容简介：
Neutral atoms in optical tweezers promoted to Rydberg states are one of the most promising platforms for quantum simulation. Due to their exceptional lifetime, circular Rydberg atoms additionally offer an unprecedented potential for being trapped for timescale ranging from tenth of ms up to minutes when implementing spontaneous emission inhibition in cryogenic environments.
With rubidium atoms, we demonstrated the trapping at millisecond timescale of individual circular Rydberg atoms in bottle beam tweezers [1]. More recently we fully characterized the dipole-dipole interaction between two circular atoms. This achievement paves the route to first quantum simulations on exceptional timescale for e.g. investigation of out-of-equilibrium phenomena.
We also developed a platform based on strontium, which offers a variety of possibilities for local optical manipulation of a circular atom by locally addressing its second valence electron with focussed lasers. We demonstrated the coherent optical manipulation of a circular state using its quadrupole coupling with the metastable 5d state of the ionic core [3,4]. We also observed laser cooling of a circular atom using the radiation pressure of a laser resonant with the ionic core [5]. This makes Sr circular states very promising candidates for merging quantum technology developed in the context of trapped ions with that based on the manipulation of Rydberg atoms.
[1] T. L. Nguyen, J. M. Raimond, C. Sayrin, R. Cortiñas, T. Cantat-Moltrecht, F. Assemat, I. Dotsenko, S. Gleyzes, S. Haroche, G. Roux, Th. Jolicoeur, and M. Brune, Phys. Rev. X, 8, 011032 (2018).
[2] B. Ravon et al., arXiv:2304.04831.
[3] R. C. Teixeira, A. Larrouy, A. Muni, L. Lachaud, J.-M. Raimond , S. Gleyzes ,1 and M. Brune, Phys. Rev. Lett. 125, 263001 (2020)
[4] A. Muni, L. Lachaud, A. Couto, M. Poirier, R. C. Teixeira, J-M. Raimond, M. Brune, S. Gleyzes, Nature Physics, accepted, arXiv:2111.14504.
[5] L. Lachaud et al., in preparation.