Bose polarons in the strongly interacting regime
Quantum Gases
2016-08-03 v1 Quantum Physics
Abstract
When an impurity is immersed in a Bose-Einstein condensate, impurity-boson interactions are expected to dress the impurity into a quasiparticle, the Bose polaron. We superimpose an ultracold atomic gas of Rb with a much lower density gas of fermionic K impurities. Through the use of a Feshbach resonance and RF spectroscopy, we characterize the energy, spectral width and lifetime of the resultant polaron on both the attractive and the repulsive branches in the strongly interacting regime. The width of the polaron in the attractive branch is narrow compared to its binding energy, even as the two-body scattering length formally diverges.
Keywords
Cite
@article{arxiv.1605.00729,
title = {Bose polarons in the strongly interacting regime},
author = {Ming-Guang Hu and Michael J. Van de Graaff and Dhruv Kedar and John P. Corson and Eric A. Cornell and Deborah S. Jin},
journal= {arXiv preprint arXiv:1605.00729},
year = {2016}
}
Comments
5 pages, 4 figures