Quantum optics represents a convenient platform for implementations of protocols for quantum information processing. Single photons as carriers of quantum information have advantages that they negligibly suffer from decoherence and their state can be easily and precisely manipulated using standard optical elements. In the project we will focus on the realizations of protocols based on entangled pairs of photons, fiber optics and post-selection measurements by means of single-photon counting detectors. The main aim is the construction of an electronic feedback that will enable an active modification of the state of one photon depending on the results of previous measurement on the other photon. This can be utilized for many purposes such as - for example - a significant enhancement of probability of success of some operations or a correction of a state that was disturbed by gaining partial information on it. (en)
Konstrukce variabilního interferometrického zařízení na bázi vláknové optiky s využitím korelovaných párů fotonů a především s využitím elektronické zpětné vazby umožňující modifikovat kvantový stav fotonu na základě předchozího měření na jiném fotonu.