dorsal/arxiv
View SchemaFluorescence control through multiple interference mechanisms
| Authors | E. Paspalakis, C. H. Keitel, P. L. Knight |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/9810072 |
| URL | https://arxiv.org/abs/quant-ph/9810072 |
| DOI | 10.1103/PhysRevA.58.4868 |
Abstract
We discuss the spontaneous emission from a coherently prepared and microwave driven doublet of potentially closely spaced excited states to a common ground level. Multiple interference mechanisms are identified which may lead to fluorescence inhibition in well-separated regions of the spectrum or act jointly in cancelling the spontaneous emission. In addition to phase independent quantum interferences due to combined absorptions and emissions of driving field photons, we distinguish two competing phase dependent interference mechanisms as means of controlling the fluorescence. The indistinguishable quantum paths may involve the spontaneous emission from the same state of the doublet, originating from the two different components of the initial coherent superposition. Alternatively the paths involve a different spontaneous photon from each of two decaying states, necessarily with the same polarization. This makes these photons indistinguishable in principle within the uncertainty of the two decay rates. The phase dependence arises for both mechanisms because the interfering paths differ by an unequal number of stimulated absorptions and emissions of the microwave field photons.
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"abstract": "We discuss the spontaneous emission from a coherently prepared and microwave\ndriven doublet of potentially closely spaced excited states to a common ground\nlevel. Multiple interference mechanisms are identified which may lead to\nfluorescence inhibition in well-separated regions of the spectrum or act\njointly in cancelling the spontaneous emission. In addition to phase\nindependent quantum interferences due to combined absorptions and emissions of\ndriving field photons, we distinguish two competing phase dependent\ninterference mechanisms as means of controlling the fluorescence. The\nindistinguishable quantum paths may involve the spontaneous emission from the\nsame state of the doublet, originating from the two different components of the\ninitial coherent superposition. Alternatively the paths involve a different\nspontaneous photon from each of two decaying states, necessarily with the same\npolarization. This makes these photons indistinguishable in principle within\nthe uncertainty of the two decay rates. The phase dependence arises for both\nmechanisms because the interfering paths differ by an unequal number of\nstimulated absorptions and emissions of the microwave field photons.",
"arxiv_id": "quant-ph/9810072",
"authors": [
"E. Paspalakis",
"C. H. Keitel",
"P. L. Knight"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.58.4868",
"title": "Fluorescence control through multiple interference mechanisms",
"url": "https://arxiv.org/abs/quant-ph/9810072"
},
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