2009/12/31 by H. Schempp, G. Günter, C. S. Hofmann +11 · 1 citation
Physics and Astronomy · #Atomic and Subatomic Physics Research #Atomic physics #Cold Atom Physics and Bose-Einstein Condensates #Laser #Laser linewidth #Molecule #Physics #Population #Quantum mechanics #Quantum optics and atomic interactions #Resonance (particle physics) #Rydberg formula #Trapping #physics.atom-ph #van der Waals force
paper · pdf · doi:10.1103/physrevlett.104.173602
arxiv created 2010/03/01 · openalex publication_date 2010/04/29 · arxiv updated 2015/05/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We investigate coherent population trapping in a strongly interacting ultracold Rydberg gas. Despite the strong van der Waals interactions and interparticle correlations, we observe the persistence of a resonance with subnatural linewidth at the single-particle resonance frequency as we tune the interaction strength. This narrow resonance cannot be understood within a mean-field description of the strong Rydberg-Rydberg interactions. Instead, a many-body density matrix approach, accounting for the dynamics of interparticle correlations, is shown to reproduce the observed spectral features.