778 citations
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29 papers · 1 filter
Spatial modes in waveguided parametric down-conversion
Andreas Christ, Kaisa Laiho, Andreas Eckstein +3
The propagation of several spatial modes has a significant impact on the structure of the emission from parametric down-conversion in a nonlinear waveguide. This manifests itself n…
Correlation Measurement of Squeezed Light
Leonid A. Krivitsky, Ulrik L. Andersen, Ruifang Dong +3
We study the implementation of a correlation measurement technique for the characterization of squeezed light which is nearly free of electronic noise. With two different sources o…
Mutually unbiased bases and generalized Bell states
A. B. Klimov, D. Sych, L. L. Sanchez-Soto +1
We employ a straightforward relation between mutually unbiased and Bell bases to extend the latter in terms of a direct construction for the former. We analyze in detail the proper…
Pure single photon generation by type-I PDC with backward-wave amplification
A. Christ, A. Eckstein, P. J. Mosley +1
We explore a promising method of generating pure heralded single photons. Our approach is based on parametric downconversion in a periodically-poled waveguide. However, unlike conv…
Fiber-assisted single-photon spectrograph
Malte Avenhaus, Andreas Eckstein, Peter J. Mosley +1
We demonstrate the implementation of a fiber-integrated spectrograph utilizing chromatic group velocity dispersion (GVD) in a single mode fiber. By means of GVD we stretch an ultra…
Spectrum conditions for symmetric extendible states
Geir Ove Myhr, Norbert Lütkenhaus
We analyze bipartite quantum states that admit a symmetric extension. Any such state can be decomposed into a convex combination of states that allow a _pure_ symmetric extension.…