Matches in SemOpenAlex for { <https://semopenalex.org/work/W2074855065> ?p ?o ?g. }
- W2074855065 abstract "The absorption spectrum of a weak probe, interacting with a driven degenerate two-level atomic system, whose ground and excited hyperfine states are ${mathrm{F}}_{g,e},$ can exhibit narrow peaks at line center. When the pump and probe polarizations are different, ${F}_{e}{=F}_{g}+1$ and ${F}_{g}>0,$ the electromagnetically induced absorption (EIA) peak has been shown to be due to the transfer of coherence (TOC) between the excited and ground states via spontaneous decay. We give a detailed explanation of why the TOC that leads to EIA (EIA-TOC) can only take place when ground-state population trapping does not occur, that is, when ${F}_{e}{=F}_{g}+1.$ We also explain why EIA-TOC is observed in open systems. We show that EIA can also occur when the pump and probe polarizations are identical and ${F}_{e}{=F}_{g}+1.$ This EIA is analogous to an effect that occurs in simple two-level systems when the collisional transfer of population (TOP) from the ground state to a reservoir is greater than that from the excited state. For a degenerate two-level system, the reservoir consists of the Zeeman sublevels of the ground hyperfine state, and of other nearby hyperfine states that do not interact with the pump. We will also discuss the four-wave mixing spectrum under the conditions where EIA-TOC and EIA-TOP occur." @default.
- W2074855065 created "2016-06-24" @default.
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- W2074855065 date "2003-03-21" @default.
- W2074855065 modified "2023-09-30" @default.
- W2074855065 title "Electromagnetically induced absorption due to transfer of coherence and to transfer of population" @default.
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- W2074855065 doi "https://doi.org/10.1103/physreva.67.033807" @default.
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