dorsal/arxiv
View SchemaInterference in the resonance fluorescence of two incoherently coupled transitions
| Authors | Martin Kiffner, Joerg Evers, Christoph H. Keitel |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0603080 |
| URL | https://arxiv.org/abs/quant-ph/0603080 |
| DOI | 10.1103/PhysRevA.73.063814 |
| Journal | Phys. Rev. A 73, 063814 (2006) |
Abstract
The fluorescence light emitted by a 4-level system in $J=1/2$ to $J=1/2$ configuration driven by a monochromatic laser field and in an external magnetic field is studied. We show that the spectrum of resonance fluorescence emitted on the $\pi$ transitions shows a signature of spontaneously generated interference effects. The degree of interference in the fluorescence spectrum can be controlled by means of the external magnetic field, provided that the Land\'e g-factors of the excited and the ground state doublet are different. For a suitably chosen magnetic field strength, the relative weight of the Rayleigh line can be completely suppressed, even for low intensities of the coherent driving field. The incoherent fluorescence spectrum emitted on the $\pi$ transitions exhibits a very narrow peak whose width and weight depends on the magnetic field strength. We demonstrate that the spectrum of resonance fluorescence emitted on the $\sigma$ transitions show an indirect signature of interference. A measurement of the relative peak heights in the spectrum from the $\sigma$ transitions allows to determine the branching ratio of the spontaneous decay of each excited state into the $\sigma$ channel.
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"abstract": "The fluorescence light emitted by a 4-level system in $J=1/2$ to $J=1/2$\nconfiguration driven by a monochromatic laser field and in an external magnetic\nfield is studied. We show that the spectrum of resonance fluorescence emitted\non the $\\pi$ transitions shows a signature of spontaneously generated\ninterference effects. The degree of interference in the fluorescence spectrum\ncan be controlled by means of the external magnetic field, provided that the\nLand\\\u0027e g-factors of the excited and the ground state doublet are different.\nFor a suitably chosen magnetic field strength, the relative weight of the\nRayleigh line can be completely suppressed, even for low intensities of the\ncoherent driving field. The incoherent fluorescence spectrum emitted on the\n$\\pi$ transitions exhibits a very narrow peak whose width and weight depends on\nthe magnetic field strength. We demonstrate that the spectrum of resonance\nfluorescence emitted on the $\\sigma$ transitions show an indirect signature of\ninterference. A measurement of the relative peak heights in the spectrum from\nthe $\\sigma$ transitions allows to determine the branching ratio of the\nspontaneous decay of each excited state into the $\\sigma$ channel.",
"arxiv_id": "quant-ph/0603080",
"authors": [
"Martin Kiffner",
"Joerg Evers",
"Christoph H. Keitel"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.73.063814",
"journal_ref": "Phys. Rev. A 73, 063814 (2006)",
"title": "Interference in the resonance fluorescence of two incoherently coupled transitions",
"url": "https://arxiv.org/abs/quant-ph/0603080"
},
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