Fink, Martin and Eiglsperger, Johannes and Friedrich, Harald and Madronero, Javier (2011) Scattering of ultracold atoms by an absorbing nanowire. EUROPEAN PHYSICAL JOURNAL D, 63 (1). pp. 33-39. ISSN 1434-6060,
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We study the scattering of ultracold atoms by a conducting cylindrical wire with total absorption near the surface of the wire. A hierarchy of approximations for the exact nonretarded atom-wire potential is explored. We show the existence of a semiclassical region near to the surface of the wire, which allows us to unambiguously define incoming boundary conditions for the description of total absorption at the wire surface. The semiclassical region is only reproduced by an accurate treatment of the potential. We calculate the complex s-wave scattering length for the effective two-dimensional atom-wire scattering problem. The scattering length tends to the wire radius R in the thick-wire limit, and it tends to 0 nearly as (ln R)(-1) in the thin-wire limit.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | LONG-RANGE INTERACTIONS; 2 DIMENSIONS; REFLECTION; HELIUM; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 09 Jun 2020 10:00 |
| Last Modified: | 09 Jun 2020 10:00 |
| URI: | https://pred.uni-regensburg.de/id/eprint/20697 |
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