Our recent activities cover: a) cloning of single-photon quantum states in bulk and fiber optics, b) optical arrangements for quantum information processing, routers and amplifiers, c) various optical gates for the preparation and modification of quantum states of light, d) new sources of correlated photon pairs based on waveguide layered structures. Motivated by different forms of quantum gates realized in the past in our laboratory by using entangled photon pairs, we suggest to explore the switching properties of different kinds of photonic structures, including their possible unidirectional propagation. Different kinds of switching properties for the light have been discussed recently relying on photonic structures exhibiting PT-symmetry, i.e. where the present loss is compensated by the corresponding gain. Even unidirectional property can be reached when switching the light. These versatile properties of photonic structures make them prospective also for possible realizations of suitable quantum-like gates that would mimic the behavior of real quantum gates analyzed in the past. The project aims at further development of photonic structures with switching properties towards suggestion and realization more advanced photonic structures with advanced modes of switching/gating properties for the light. The properties of exceptional points and diabolical points of PT-symmetric systems and their generalizations are assumed to the exploited in the construction of new kinds of switches and gates.
I work at the Institute of Physics of the Czech Academy of Sciences.
Our experimental laboratories are equipped with basic facilities necessary for experiments in quantum optics and is available also for this project purposes. See more details on web page: http://multiphoton.upol.cz/
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