Controlled bistability of cold Rydberg excitation with Doppler broadening
| Autor: | Hui Yang, Jin-Hui Wu, Han-Xiao Zhang, Chu-Hui Fan, Yi-Mou Liu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
education.field_of_study Bistability Population Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics 010305 fluids & plasmas Optical bistability symbols.namesake 0103 physical sciences Rydberg formula symbols Physics::Atomic Physics Laser detuning Atomic physics van der Waals force 010306 general physics education Excitation Doppler broadening |
| Zdroj: | Journal of Physics B: Atomic, Molecular and Optical Physics. 52:055502 |
| ISSN: | 1361-6455 0953-4075 |
| DOI: | 10.1088/1361-6455/aafdd6 |
| Popis: | We study in theory the single-photon Rydberg excitation in an ensemble of two-level cold atoms at finite low temperatures. Rydberg population plotted against laser detuning may exhibit a nonlinear bistable behavior arising from the dipole–dipole interactions manifested as a van der Waals (vdW) potential. We find that Doppler broadening can result in a remarkable reduction of the bistable region, which may disappear as the atomic temperature increases to a certain value, of the order of tens to hundreds of μK. This special temperature, depending critically on the vdW potential, can be largely raised by partially eliminating the Doppler effect, when a double-photon excitation scheme is used to replace the single-photon excitation scheme. |
| Databáze: | OpenAIRE |
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