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Probing anomalous relaxation by coherent multidimensional optical spectroscopy | | F. Sanda
; S. Mukamel
; | | Date: |
11 Jan 2007 | | Subject: | Soft Condensed Matter; Statistical Mechanics | | Abstract: | We propose to study the origin of algebraic decay of two-point correlation functions observed in glasses, proteins, and quantum dots by their nonlinear response to sequences of ultrafast laser pulses. Power-law spectral singularities and temporal relaxation in two-dimensional correlation spectroscopy (2DCS) signals are predicted for a continuous time random walk model of stochastic spectral jumps in a two level system with a power-law distribution of waiting times $psi (t)sim t^{-alpha -1}$. Spectroscopic signatures of stationary ensembles for $1<alpha <2$ and aging effects in nonstationary ensembles with $0<alpha <1$ are identified. | | Source: | arXiv, cond-mat/0701255 | | Other source: | [GID 188402] pmid17359082 | | Services: | Forum | Review | PDF | Favorites | |
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