Casimir-Polder forces and their consequences ... (Dr. S. Buhmann)

  • Date: Mar 23, 2016
  • Time: 11:30 AM - 01:00 PM (Local Time Germany)
  • Speaker: Dr. Stefan Buhmann, Albert-Ludwigs-Universität Freiburg, Physikalisches Institut, Freiburg
  • Room: Herbert Walther Lecture Hall
  • Host: MPQ, Theory Division
Casimir-Polder forces and their consequences: from matter-wave scattering in complex geometries to CP violation and quantum friction Casimir-Polder forces between a single atom and a macroscopic body are effective electromagnetic interactions that may be attributed to the vacuum fluctuations of the electromagnetic field.

I will introduce macroscopic quantum electrodynamics as a powerful tool to study this force for arbitrary geometries. As examples, I will consider a dielectric sphere and a grating, showing how the position-dependent Casimir-Polder energy influences the scattering of cold atomic matter waves. In the second part of my talk, I will discuss two more exotic types of Casimir-Polder interaction. Firstly, I will show how media violating the Lorentz reciprocity property give rise to force which are sensitive to violations of charge-parity symmetry. Secondly, I will discuss how atoms moving parallel to a smooth surface may experience a quantum friction force.

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