Anomalous lineshapes and aging effects in two-dimensional correlation spectroscopy
Jazyk angličtina Země Spojené státy americké Médium print
Typ dokumentu časopisecké články, Research Support, N.I.H., Extramural, práce podpořená grantem, Research Support, U.S. Gov't, Non-P.H.S.
Grantová podpora
GM59230
NIGMS NIH HHS - United States
PubMed
17949132
DOI
10.1063/1.2793786
Knihovny.cz E-zdroje
- MeSH
- algoritmy MeSH
- časové faktory MeSH
- difuze MeSH
- fyzikální chemie metody MeSH
- Markovovy řetězce MeSH
- molekulární konformace MeSH
- normální rozdělení MeSH
- počítačová simulace MeSH
- pravděpodobnost MeSH
- spektrální analýza metody MeSH
- statistické modely MeSH
- stochastické procesy MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Research Support, N.I.H., Extramural MeSH
- Research Support, U.S. Gov't, Non-P.H.S. MeSH
Multitime correlation functions provide useful probes for the ensembles of trajectories underlying the stochastic dynamics of complex systems. These can be obtained by measuring their optical response to sequences of ultrashort optical pulse. Using the continuous time random walk model for spectral diffusion, we analyze the signatures of anomalous relaxation in two-dimensional four wave mixing signals. Different models which share the same two point joint probability distribution show markedly different lineshapes and may be distinguished. Aging random walks corresponding to waiting time distributions with diverging first moment show dependence of 2D lineshapes on initial observation time, which persist for long times.
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