504 citations · 7.2k across the 114 of their papers we have counts for
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Quantum states made to measure
Konrad Banaszek, Rafal Demkowicz-Dobrzanski, Ian A. Walmsley
Recent progress in manipulating quantum states of light and matter brings quantum-enhanced measurements closer to prospective applications. The current challenge is to make quantum…
Quantum and semiclassical polarization correlations
Konrad Banaszek, Rafal Demkowicz-Dobrzanski, Michal Karpinski +2
We analyze the strength of polarization correlations between two light beams that can be achieved in the semiclassical regime using statistical mixtures of coherent states and bina…
Experimental quantum-enhanced estimation of a lossy phase shift
M. Kacprowicz, R. Demkowicz-Dobrzanski, W. Wasilewski +2
When standard light sources are employed, the precision of the phase determination is limited by the shot noise. Quantum entanglement provides means to exceed this limit with the c…
Modelling and optimization of photon pair sources based on spontaneous parametric down-conversion
Piotr Kolenderski, Wojciech Wasilewski, Konrad Banaszek
We address the problem of efficient modelling of photon pairs generated in spontaneous parametric down-conversion and coupled into single-mode fibers. It is shown that when the ran…
Experimental characterization of three-wave mixing in a multimode nonlinear KTiOPO_4 waveguide
Michal Karpinski, Czeslaw Radzewicz, Konrad Banaszek
We report experimental determination of the phase-matching function for type-II three-wave mixing in a periodically poled KTiOPO_4 waveguide in the 792-815 nm spectral region. The…
Quantum phase estimation with lossy interferometers
R. Demkowicz-Dobrzanski, U. Dorner, B. J. Smith +4
We give a detailed discussion of optimal quantum states for optical two-mode interferometry in the presence of photon losses. We derive analytical formulae for the precision of pha…