Effects of neighboring transitions on the mechanisms of electromagnetically induced absorption and transparency in an open degenerate multilevel system

In this study, optical Bloch equations with and without neighboring hyperfine states near the degenerate two-level system (DTLS) in the challenging case of $$^{85}$$ 85 Rb D2 transition, which involves the Doppler broadening effect, are solved. The calculated spectra agree well with the experimental results obtained based on the coupling-probe scheme with orthogonal linear polarizations of the coupling and probe fields. The mechanisms of electromagnetically induced absorption (electromagnetically induced transparency) for the open $$F_g=3 \rightarrow F_e=2$$ F g = 3 → F e = 2 and 3 transitions (open $$F_g=2 \rightarrow F_e=2$$ F g = 2 → F e = 2 and 3 transitions) are determined to be the effect of the strong closed $$F_g=3 \rightarrow F_e=4$$ F g = 3 → F e = 4 transition line (strong closed $$F_g=2 \rightarrow F_e=1$$ F g = 2 → F e = 1 transition line); this finding is based on a comparison between the calculated absorption profiles of the DTLS without neighboring states and those of all levels with neighboring states, depending on the coupling and probe power ratios. Furthermore, based on the aforementioned comparison, the crucial factors that enhance or reduce the coherence effects and lead to the transformation between electromagnetically induced absorption and electromagnetically induced transparency, are (1) the power ratios between the coupling and probe beams, (2) the openness of the excited state, and (3) effects of the neighboring states due to Doppler broadening in a real atomic system.

Stage practices as a means of self-identification of the Greek ethnic of Azov region

The purpose of the article is to reveal the peculiarities of the revival of ethnic self-identification by the Greeks of the Azov region by means of stage practices. Research methodology. The historical-cultural method was used (to study the historical period of formation and development of the Greek ethnos of the Azov region); theoretical method (to summarize the data of the material analyzed in the article in order to highlight the main trends of stage practices of the Greeks of the Azov region); structural-functional method (for analysis of the structure of ethnocultural self-identification); cultural-semiotic method (for the study of the method of constructing ethnocultural self-identification as a mental structure through symbolic forms), etc. Scientific novelty. The main constants of ethnocultural identity are studied; the possibility of constructing a positive ethnic identity in contemporary performing arts in general and the ethnic group of the Greeks of the Azov region, in particular, is considered; The peculiarities of the revival of ethnic self-identification by the Greeks of the Azov region by means of stage practices were revealed. Conclusions. Manifestation of ethnocultural self-identification of cultural and artistic practices has a complex semantic and expressive structure and manifests itself as a multilevel system. In accordance with the constructivism and cultural-semiotic approach, the stage practices of the Greek ethnos of the Azov region offer a way to construct ethnocultural self-identification as a mental structure through such symbolic forms as a worldview, ethnic worldview, and artistic worldview. They reflect the consciousness of man and society as a whole, as well as what is important for the Greek ethnic group, and have the greatest potential for building a positive image of the ethnic community. Keywords: Greek ethnos, Greeks of the Azov region, stage practices, ethnocultural self-identification.

“Droit européen“ à la liberté religieuse et paradigmes des relations État- religions dans l’Europe contemporaine: une cacophonie épineuse

SOMMAIRE: 1. Introduction: paradigmes de relations et droit à la liberté religieuse, de l’identité à la tension - 2. Des paradigmes des relations État-Églises au droit à la liberté religieuse - 3. La force attractive des paradigmes dans le scénario européen contemporain - 4. Les paradigmes des relations État-Églises dans la nouvelle arène internationale - 5. Conclusion: une citoyenneté inachevée. The “European Right” to Religious Freedom and Paradigms of State-Religion Relations in Contemporary Europe: a thorny cacophony ABSTRACT: The article examines the dialectic between European national models of religious freedom and the paradigm of religious freedom shaped in the international order and in particular by the human rights discourse. The analysis of the relationship between the modern - national-centered - and the contemporary - individual-centered - paradigm of religious freedom reveals, on the one hand, the difficult but inevitable osmosis between legal systems in a multilevel system of rights protection and, on the other hand, the deep transformation of religious freedom in contemporary Europe.

Unravelling the Mechanisms of Electromagnetically Induced Absorption and Transparency in Open Degenerate Multilevel System: Effects of Neighboring Transitions

Optical Bloch equations with and without neighboring hyperfine states near the degenerate two-level system (DTLS) in the challenging case of 85Rb D2 transition that involves the Doppler broadening effect are solved herein. The calculated spectra agree well with the experimental results obtained using the coupling-probe scheme with orthogonal linear polarizations of the coupling and probe fields. The mechanisms of electromagnetically induced absorption (electromagnetically induced transparency) for the open Fg = 3 → Fe = 2 and 3 transitions (open Fg = 2 → Fe = 2 and 3 transitions) are clearly determined to be the effect of the strong closed Fg = 3 → Fe = 4 transition line (strong closed Fg = 2 → Fe = 1 transition line) based on the comparisons of the calculated absorption profiles of a DTLS without neighboring states and those of all levels with neighboring states depending on the coupling and probe power ratios. The crucial factors established based on comparisons of the calculated absorption profiles of DTLS with and without neighboring states, which enhance or reduce coherence effects and result in transformation between electromagnetically induced absorption and electromagnetically induced transparency, are the power ratios between coupling and probe beams, openness of the excited state, and effects of the neighboring states due to the Doppler broadening in a real atomic system.