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Article Dans Une Revue Nature Communications Année : 2018

Non-Abelian adiabatic geometric transformations in a cold Strontium gas

Résumé

Topology, geometry, and gauge fields play key roles in quantum physics as exemplified by fundamental phenomena such as the Aharonov-Bohm effect, the integer quantum Hall effect, the spin Hall, and topological insulators. The concept of topological protection has also become a salient ingredient in many schemes for quantum information processing and fault-tolerant quantum computation. The physical properties of such systems crucially depend on the symmetry group of the underlying holonomy. We study here a laser-cooled gas of strontium atoms coupled to laser fields through a 4-level resonant tripod scheme. By cycling the relative phases of the tripod beams, we realize non-Abelian SU(2) geometrical transformations acting on the dark-states of the system and demonstrate their non-Abelian character. We also reveal how the gauge field imprinted on the atoms impact their internal state dynamics. It leads to a new thermometry method based on the interferometric displacement of atoms in the tripod beams.
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Dates et versions

hal-01711814 , version 1 (21-02-2018)
hal-01711814 , version 2 (04-09-2018)

Identifiants

Citer

Frédéric Leroux, Kanhaiya Pandey, Riadh Rebhi, Frederic Chevy, Christian Miniatura, et al.. Non-Abelian adiabatic geometric transformations in a cold Strontium gas. Nature Communications, 2018, 9 (3580), ⟨10.1038/s41467-018-05865-3⟩. ⟨hal-01711814v2⟩
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