dorsal/arxiv
View SchemaCoherent properties of a tripod system coupled via a continuum
| Authors | R. G. Unanyan, N. V. Vitanov, B. W. Shore, K. Bergmann |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/9909061 |
| URL | https://arxiv.org/abs/quant-ph/9909061 |
| DOI | 10.1103/PhysRevA.61.043408 |
Abstract
We present results from a study of the coherence properties of a system involving three discrete states coupled to each other by two-photon processes via a common continuum. This tripod linkage is an extension of the standard laser-induced continuum structure (LICS) which involves two discrete states and two lasers. We show that in the tripod scheme, there exist two population trapping conditions; in some cases these conditions are easier to satisfy than the single trapping condition in two-state LICS. Depending on the pulse timing, various effects can be observed. We derive some basic properties of the tripod scheme, such as the solution for coincident pulses, the behaviour of the system in the adiabatic limit for delayed pulses, the conditions for no ionization and for maximal ionization, and the optimal conditions for population transfer between the discrete states via the continuum. In the case when one of the discrete states is strongly coupled to the continuum, the population dynamics reduces to a standard two-state LICS problem (involving the other two states) with modified parameters; this provides the opportunity to customize the parameters of a given two-state LICS system.
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"abstract": "We present results from a study of the coherence properties of a system\ninvolving three discrete states coupled to each other by two-photon processes\nvia a common continuum. This tripod linkage is an extension of the standard\nlaser-induced continuum structure (LICS) which involves two discrete states and\ntwo lasers. We show that in the tripod scheme, there exist two population\ntrapping conditions; in some cases these conditions are easier to satisfy than\nthe single trapping condition in two-state LICS. Depending on the pulse timing,\nvarious effects can be observed. We derive some basic properties of the tripod\nscheme, such as the solution for coincident pulses, the behaviour of the system\nin the adiabatic limit for delayed pulses, the conditions for no ionization and\nfor maximal ionization, and the optimal conditions for population transfer\nbetween the discrete states via the continuum. In the case when one of the\ndiscrete states is strongly coupled to the continuum, the population dynamics\nreduces to a standard two-state LICS problem (involving the other two states)\nwith modified parameters; this provides the opportunity to customize the\nparameters of a given two-state LICS system.",
"arxiv_id": "quant-ph/9909061",
"authors": [
"R. G. Unanyan",
"N. V. Vitanov",
"B. W. Shore",
"K. Bergmann"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.61.043408",
"title": "Coherent properties of a tripod system coupled via a continuum",
"url": "https://arxiv.org/abs/quant-ph/9909061"
},
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