indico  First event Previous event AlbaNova and Nordita Colloquium Next event Last event   | view:  |  manage export to personal scheduler  | 
user login 

 

Lise Meitner Distinguished Lecture: Geometric phases and the separation of the world
  AlbaNova and Nordita Colloquium

Thursday 25 April 2019
from 15:15 to 17:00
at Oscar Klein Auditorium
Speaker : Michael Berry (H H Wills Physics Laboratory, University of Bristol, UK)
Abstract : The waves that describe systems in quantum physics can carry information about how their environment has been altered, for example by forces acting on them. This effect is the geometric phase. It also occurs in the optics of polarised light, where it goes back to the 1830s. The underlying mathematics is geometric: the phenomenon of parallel transport, which also explains how falling cats land on their feet, and why parking a car in a narrow space is difficult. Incorporating the back-reaction of the geometric phase on the dynamics of the changing environment exposes the unsolved problem of how strictly a system can be separated from a slowly-varying environment, and involves different mathematics: divergent infinite series.

Nordita  | Last modified 14 March 2019 09:45  |  HELP