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2017 | OriginalPaper | Buchkapitel

5. Semimartingale Approach and Localization Transition

verfasst von : Francis Comets

Erschienen in: Directed Polymers in Random Environments

Verlag: Springer International Publishing

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Abstract

The next step in our martingale analysis is to consider lnW n as a semimartingale and to write its Doob’s decomposition. Viewed as a “conditional second moment” method, this new approach is the natural continuation of the techniques from Chap. 3 However this technique was introduced much later. One concrete output is to point out polymer localization, and to relate this phenomenon to strong disorder.

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Metadaten
Titel
Semimartingale Approach and Localization Transition
verfasst von
Francis Comets
Copyright-Jahr
2017
DOI
https://doi.org/10.1007/978-3-319-50487-2_5