Regensburg 2016 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 57: Quantum Dots and Wires: Quantum Optics II
HL 57.3: Vortrag
Mittwoch, 9. März 2016, 12:45–13:00, H15
Creation of a squeezed photon distribution using artificial atoms with broken inversion symmetry — •Martin Koppenhöfer and Michael Marthaler — Karlsruhe Institut of Technology, Karlsruhe, Germany
We consider a two level system with both a transversal and a longitudinal coupling to the electromagnetic field of a resonator. Using a polaron transformation, this Hamiltonian can be mapped onto a Jaynes-Cummings Hamiltonian with generalized field operators acting on the electromagnetic field in the resonator. In contrast to the usual ladder operators a and a†, these operators exhibit a non-monotous coupling strength with respect to the number n of photons in the resonator. Especially, there are roots of the coupling between qubit and resonator at certain photon numbers n0. We show that this effect can be exploited to generate photon-number squeezed light, characterized by a Fano factor F ≪ 1, with a large number of photons (e.g. of the order of 104).