In the last two decades, it has been established that a single universal probability distribution function, known as the Tracy — Widom (TW) distribution, in many cases provides a macroscopic-level description of the statistical properties of microscopically different systems, including both purely mathematical ones, such as increasing subsequences in random permutations, and quite physical ones, such as directed polymers in random media or polynuclear crystal growth. In the first part of this review, we use a number of models to examine this phenomenon at a simple qualitative level and then consider the exact solution for one-dimensional directed polymers in a random environment, showing that free energy fluctuations in such a system are described by the universal TW distribution. The second part provides detailed appendix material containing the necessary mathematical background for the first part.

PACS: 02.50.Cw, 02.90.+p, 05.20.−y, 05.40.−a, 61.41.+e (all) DOI: 10.3367/UFNe.0181.201103b.0269 URL: https://ufn.ru/en/articles/2011/3/b/ 000294813600002 2-s2.0-79959946753 2011PhyU...54..259D Citation: Dotsenko V S "Universal randomness" Phys. Usp. 54 259–280 (2011) BibTexBibNote ® (generic)BibNote ® (RIS)MedlineRefWorks Received: 16th, July 2010, accepted: 13th, October 2010 Оригинал: Доценко В С «Универсальная случайность» УФН 181 269–292 (2011); DOI: 10.3367/UFNr.0181.201103b.0269