Dresden 2014 – scientific programme
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O: Fachverband Oberflächenphysik
O 64: Poster: Surfaces, Interfaces and Heterostructures (HL jointly with O)
O 64.1: Poster
Wednesday, April 2, 2014, 17:00–20:00, P1
Waveguide Quantum Electrodynamics - Nonlinear Physics at the Few-Photon Level — Tobias Sproll1, Christoph Martens1, •Michael Schneider1, Peter Schmitteckert2, and Kurt Busch1,3 — 1Max-Born-Institut, Max-Born-Str. 2A, 12489 Berlin, Germany — 2Institut für Nanotechnologie, Karlsruher Institut für Technologie (KIT), 76344 Eggenstein-Leopoldshafen, Germany — 3Humboldt-Universität zu Berlin, Institut für Physik, AG Theoretische Optik und Photonik, Newtonstr. 15, 12489 Berlin, Germany
The transport of few photons in 1D structures coupled to a fermionic impurity gives rise to a set of non-linear effects, induced by an effective interaction due to Pauli blocking such as photon bunching and the formation of atom-photon bound states.
We analyze a specific example of such systems, namely a 1-D waveguide coupled to a 2-level system, for the case of one and two-photon transport. Therefore we have developed a general theoretical framework, which contains analytic approaches originating in methods of qutantum field theory, like path integrals and Feynman diagrams as well as powerful numerical tools based on solving the time-dependent Schrödinger equation.
Owing its generality, our approach is also applicable to more involved setups, including disorder and dissipation as well as more complicated impurities such as driven and undriven 3-level systems.