Cold Collision Frequency Shift in Two-Dimensional Atomic Hydrogen
其他凝聚态物理
2009-11-11 v1
摘要
We report a measurement of the cold collision frequency shift in atomic hydrogen gas adsorbed on the surface of superfluid 4He at T<=90 mK. Using two-photon electron and nuclear magnetic resonance in 4.6 T field we separate the resonance line shifts due to the dipolar and exchange interactions, both proportional to surface density sigma. We find the clock shift Delta v_c = -1.0(1)x10^-7 Hz cm^-2 x sigma, which is about 100 times smaller than the value predicted by the mean field theory and known scattering lengths in the 3D case.
引用
@article{arxiv.cond-mat/0610766,
title = {Cold Collision Frequency Shift in Two-Dimensional Atomic Hydrogen},
author = {J. Ahokas and J. Jarvinen and S. Vasiliev},
journal= {arXiv preprint arXiv:cond-mat/0610766},
year = {2009}
}
备注
4 pages, 3 figures