Gauge theory of topological phases of matter
- Fröhlich, Jürg Theoretische Physik, ETH Zurich, Switzerland - School of Mathematics, The Institute for Advanced Study - Princeton, USA
- Werner, Philipp Department of Physics, University of Fribourg, Switzerland
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05.03.2013
Published in:
- EPL (Europhysics Letters). - 2013, vol. 101, no. 4, p. 47007
English
We study the response of quantum many-body systems to coupling some of their degrees of freedom to external gauge fields. This serves to understand the current Green functions and transport properties of interacting many-body systems. Our analysis leads to a "gauge theory of states of matter" complementary to the well-known Landau theory of order parameters. We illustrate the power of our approach by deriving and interpreting the gauge-invariant effective actions of (topological) superconductors, 2D electron gases exhibiting the quantized Hall- and spin-Hall effect, 3D topological insulators, as well as axion electrodynamics. We also use the theory to elucidate the structure of surface modes in these systems.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Physique
- Language
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- English
- Classification
- Physics
- License
- License undefined
- Identifiers
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- RERO DOC 31970
- DOI 10.1209/0295-5075/101/47007
- Persistent URL
- https://folia.unifr.ch/unifr/documents/303067
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