68 citations · 201 across the 5 of their papers we have counts for
7 papers · 1 filter
Down-conversion source of positively spectrally correlated and decorrelated photon pairs at telecom wavelength
Thomas Lutz, Piotr Kolenderski, Thomas Jennewein
The frequency correlation (or decorrelation) of photon pairs is of great importance in long-range quantum communications and photonic quantum computing. We experimentally character…
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…
Density matrix of a single photon produced in parametric down conversion derived
Piotr Kolenderski, Wojciech Wasilewski
We introduce an effective numerical method of density matrix determination of fiber coupled single photon generated in process of spontaneous parametric down conversion in type I n…
Optimal state for keeping reference frames aligned and the Platonic solids
Piotr Kolenderski, Rafal Demkowicz-Dobrzanski
The optimal N qubit states featuring highest sensitivity to small misalignment of cartesian reference frames are found using the Quantum Cramer-Rao bound. It is shown that the opti…
Effects of imperfect noise correlations on decoherence-free subsystems: SU(2) diffusion model
Rafal Demkowicz-Dobrzanski, Piotr Kolenderski, Konrad Banaszek
We present a model of an N-qubit channel where consecutive qubits experience correlated random rotations. Our model is an extension to the standard decoherence-free subsystems appr…
Spectral density matrix of a single photon measured
Wojciech Wasilewski, Piotr Kolenderski, Robert Frankowski
We propose and demonstrate a method for measuring the spectral density matrix of a single photon pulse. The method is based on registering Hong-Ou-Mandel interference between photo…