Physics / Fizik

Permanent URI for this collectionhttps://hdl.handle.net/11147/6

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Access Right: Open AccessInstitution Author: search.filters.institutionAuthor.Sevinçli, Sevilay

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  • Article
    Citation - WoS: 5
    Citation - Scopus: 4
    Electromagnetically Induced Transparency and Absorption Cross-Over With a Four-Level Rydberg System
    (IOP Publishing, 2022) Oyun, Yağız; Çakır, Özgür; Sevinçli, Sevilay
    Electromagnetically induced transparency (EIT) and absorption (EIA) are quantum coherence phenomena which result from the interference of excitation pathways. Combining these with Rydberg atoms have opened up many possibilities for various applications. We introduce a theoretical model to study Rydberg-EIT and Rydberg-EIA effects in cold Cs and Rb atomic ensembles in a four-level ladder type scheme taking into account van der Waals type interactions between the atoms. The proposed many-body method for analysis of such systems involves a self-consistent mean field approach and it produces results which display a very good agreement with recent experiments. Our calculations also successfully demonstrate experimentally observed EIT-EIA cross-over in the Rb case. Being able to simulate the interaction effects in such systems has significant importance, especially for controlling the optical response of these.
  • Article
    Citation - WoS: 36
    Citation - Scopus: 37
    Microwave Control of Rydberg Atom Interactions
    (Iop Publishing Ltd, 2014) Sevinçli, Sevilay; Pohl, T.
    We investigate the interaction between Rydberg atoms, whose electronic states are dressed by multiple microwave fields. Numerical calculations are used for an exact description of the microwave induced interactions, and employed to benchmark a perturbative treatment that yields simple insights into the involved mechanisms. Based on this theory, we demonstrate that microwave dressing provides a powerful approach to control dipolar as well as van der Waals interactions and even permits us to turn them off entirely. In addition, the proposed scheme also opens up possibilities for engineering dominant three-body interactions.