Single-photon-level light storage with distributed Rydberg excitations in cold atoms
| Autor: | Jin-Hui Wu, Han-Xiao Zhang, Maurizio Artoni, G. C. La Rocca |
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| Přispěvatelé: | Zhang, Hanxiao, Wu, Jinhui, Artoni, Maurizio, LA ROCCA, Giuseppe Carlo |
| Rok vydání: | 2021 |
| Předmět: |
Physics
Photon Physics and Astronomy (miscellaneous) Superatom cold Rydberg atom distributed Rydberg excitation few-photons light storage Signal improved superatom model Settore FIS/03 - Fisica della Materia symbols.namesake Light storage Rydberg atom symbols Rydberg formula Polariton Physics::Atomic Physics van der Waals force Atomic physics |
| Zdroj: | Frontiers of Physics. 17 |
| ISSN: | 2095-0470 2095-0462 |
| Popis: | We present an improved version of the superatom (SA) model to examine the slow-light dynamics of a few-photons signal field in cold Rydberg atoms with van der Waals (vdW) interactions. A main feature of this version is that it promises consistent estimations on total Rydberg excitations based on dynamic equations of SAs or atoms. We consider two specific cases in which the incident signal field contains more photons with a smaller detuning or less photons with a larger detuning so as to realize the single-photon-level light storage. It is found that vdW interactions play a significant role even for the slow-light dynamics of a single-photon signal field as distributed Rydberg excitations are inevitable in the picture of dark-state polariton. Moreover, the stored (retrieved) signal field exhibits a clearly asymmetric (more symmetric) profile because its leading and trailing edges undergo different (identical) traveling journeys, and higher storage/retrieval efficiencies with well preserved profiles apply only to weaker and well detuned signal fields. These findings are crucial to understand the nontrivial interplay of single-photon-level light storage and distributed Rydberg excitations.[Figure not available: see fulltext.]. |
| Databáze: | OpenAIRE |
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