Help Privacy Policy Disclaimer
  Advanced SearchBrowse




Journal Article

Delocalized excitons and interaction effects in extremely dilute thermal ensembles


Eisfeld,  Alexander
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available

Bruder, L., Eisfeld, A., Bangert, U., Binz, M., Jakob, M., Uhl, D., et al. (2019). Delocalized excitons and interaction effects in extremely dilute thermal ensembles. Physical Chemistry Chemical Physics, 21(5), 2276-2282. doi:10.1039/c8cp05851b.

Cite as: https://hdl.handle.net/21.11116/0000-0003-CF4B-1
Long-range interparticle interactions are revealed in extremely dilute thermal atomic ensembles using highly sensitive nonlinear femtosecond spectroscopy. Delocalized excitons are detected in the atomic systems at particle densities where the mean interatomic distance (410 mm) is much greater than the laser wavelength and multi-particle coherences should destructively interfere over the ensemble average. With a combined experimental and theoretical analysis, we identify an effective interaction mechanism, presumably of dipolar nature, as the origin of the excitonic signals. Our study implies that even in highly-dilute thermal atom ensembles, significant transition dipole-dipole interaction networks may form that require advanced modeling beyond the nearest neighbor approximation to quantitatively capture the details of their many-body properties.