The complex dipole polarisabilities of alkali atoms are computed for low-lying eigenstates. We present a unified method of calculation of the real part of the polarisability as well as two different imaginary contributions to the polarisability. One imaginary polarisability is related to the resonant damping of the cross-section both below and above threshold, whilst the other imaginary polarisability describes the photoionisation cross-section above threshold. We also present preliminary calculations of the complex hyperpolarisabilities of atomic clocks and how they are impacted by the linear and non-linear photon-atom interactions. � Published under licence by IOP Publishing Ltd.
|Number of pages||1|
|Publication status||Published - 2015|
|Event||29th International Conference on Photonic, Electronic and Atomic Collisions, ICPEAC 2015 - Spain|
Duration: 22 Jul 2015 → 28 Jul 2015
|Conference||29th International Conference on Photonic, Electronic and Atomic Collisions, ICPEAC 2015|
|Period||22/07/15 → 28/07/15|
Bromley, MWJ., Grunefeld, SJ., Rossi, JM., Berengut, J. C., Tang, LY., Jiang, J., Cheng, Y. J., & Mitroy, J. (2015). Complex polarisabilities and hyperpolarisabilities of atoms. Abstract from 29th International Conference on Photonic, Electronic and Atomic Collisions, ICPEAC 2015, .