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Stuttgart 2012 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 54: Poster 3

Q 54.81: Poster

Donnerstag, 15. März 2012, 16:30–19:00, Poster.I+II

The Hong-Ou-Mandel effect in the context of few-photon scattering — •Paolo Longo1 and Kurt Busch21Institut für Theoretische Festkörperphysik, Karlsruher Institut für Technologie (KIT), 76128 Karlsruhe, Germany — 2Humboldt-Universität zu Berlin, Institut für Physik, AG Theoretische Optik, Newtonstr. 15, 12489 Berlin, and Max-Born-Institut, Max–Born–Str. 2A, 12489 Berlin, Germany

The Hong-Ou-Mandel effect [1] states that two photons impinging on a perfect beamsplitter from different ports leave the device “together” in either one of the two output ports.

Interestingly, the problem of two photons propagating from different ends in a waveguide towards a scatterer, e.g. an artificial atom, is intimately related to the Hong-Ou-Mandel effect. We numerically investigate the scattering problem in a time-dependent wavefunction formalism [2]. Depending on the realization of the scatterer and its properties, we specifically calculate the joint probability of finding both photons on either side of the waveguide after scattering and how this can be used as a probe to identify effective photon-photon interactions mediated by the scatterer. Dissipation and dephasing is taken into account with the help of a quantum jump approach.

[1] C. K. Hong, Z. Y. Ou, and L. Mandel, Phys. Rev. Lett. 59, 2044 (1987)

[2] P. Longo, P. Schmitteckert, and K. Busch, J. Opt. A: Pure Appl. Opt. 11, 114009 (2009); Phys. Rev. Lett. 104, 023602 (2010); Phys. Rev. A 83, 063828 (2011)

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