Doppler-assisted quantum resonances through swappable excitation pathways in Potassium vapor
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866911816318189568 |
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| author | Pal, Gourab Gupta, Subhasish Dutta Chaudhuri, Saptarishi |
| author_facet | Pal, Gourab Gupta, Subhasish Dutta Chaudhuri, Saptarishi |
| contents | We report the observation of two additional sub-natural line width quantum interference in the $D_2$ manifold of $^{39}K$ vapor, in addition to the usual single Electromagnetically induced transparency peak. The other two features appear exclusively because $^{39}K$ ground hyperfine splitting is smaller than the Doppler broadened absorption profile. This allows probe and control beams to swap their transition pathways. The control beam detuning captures the nature of the coherence, therefore an unusual phenomenon of conversion from perfect transparency to enhanced absorption is observed and explained by utilizing adiabatic elimination of the excited state in the Master equation. Controlling such dark and bright resonances leads to new applications in quantum technologies viz. frequency offset laser stabilization and long-lived quantum memory. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_18319 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Doppler-assisted quantum resonances through swappable excitation pathways in Potassium vapor Pal, Gourab Gupta, Subhasish Dutta Chaudhuri, Saptarishi Atomic Physics Optics Quantum Physics We report the observation of two additional sub-natural line width quantum interference in the $D_2$ manifold of $^{39}K$ vapor, in addition to the usual single Electromagnetically induced transparency peak. The other two features appear exclusively because $^{39}K$ ground hyperfine splitting is smaller than the Doppler broadened absorption profile. This allows probe and control beams to swap their transition pathways. The control beam detuning captures the nature of the coherence, therefore an unusual phenomenon of conversion from perfect transparency to enhanced absorption is observed and explained by utilizing adiabatic elimination of the excited state in the Master equation. Controlling such dark and bright resonances leads to new applications in quantum technologies viz. frequency offset laser stabilization and long-lived quantum memory. |
| title | Doppler-assisted quantum resonances through swappable excitation pathways in Potassium vapor |
| topic | Atomic Physics Optics Quantum Physics |
| url | https://arxiv.org/abs/2403.18319 |