QUASAR-Quantum States: Analysis and Realizations

Quantum Information Processing and Quantum Communication brought a radical, paradigmatic change in our understanding of the nature of information and of its use. Progress in efficient quantum computation and communication will be possible provided we gain a significantly improved comprehension of the underlying principles of quantum physics, have scalable analysis tools available to study the dynamics, decoherence, as well as the applicability of large quantum states, and, last but not least, have reliable and robust quantum technology components available. Within the European project QUASAR the Institute for Quantum Optics and Quantum Information in Vienna (IQOQI Vienna) of the Austrian Academy of Sciences (OEAW) will develop methods and technologies for novel quantum experiments. The investigation of new states for efficient multipartite quantum communication over long distances and the manipulation of highly entangled multi-photon states will provide important insights into the quantum physics of complex quantum information processing. In addition of experimentally optimizing the usage of quantum channels, the IQOQI Vienna will also use integrated and reliable waveguide quantum circuits for the implementation of photonic quantum logic operations and for robust manipulation of high-dimensional multi- photon states.

Quantum Information Processing and Quantum Communication brought a radical, paradigmatic change in our understanding of the nature of information and of its use. Progress in efficient quantum computation and communication will be possible provided we gain a significantly improved comprehension of the underlying principles of quantum physics, have scalable analysis tools available to study the dynamics, decoherence, as well as the applicability of large quantum states, and, last but not least, have reliable and robust quantum technology components available.Within the European project QUASAR the Institute for Quantum Optics and Quantum Information in Vienna (IQOQI Vienna) of the Austrian Academy of Sciences (OEAW) new methods and technologies were developed for novel quantum experiments. This allowed for the demonstration of quantum communication and quantum teleportation over distances up to 144 kilometres. In addition new and robust quantum resources could be tested, which might open up alternative paths for future quantum-enhanced technologies. Finally, by using integrated waveguide circuits a new kind of quantum computer could be demonstrated.