# Theoretical Physics

**2 March 2015**

**Time:**16:00 to 17:00

**Location:**9.90 EC Stoner

Theory Seminar

Prof Duncan Haldane, Princeton University

Title:

Quantum geometrodynamics of the incompressible fractional quantum Hall fluid

Abstract:

The fundamental collective degree of freedom of fractional quantum Hall states is identified as a unimodular two-dimensional spatial metric that characterizes the local shape of the correlations of the incompressible fluid. Its quantum fluctuations are controlled by a topologically-quantized "guiding-center spin". Charge fluctuations are proportional to its Gaussian curvature.

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