caa a22 4500 445886439 CHVBK 20180317145601.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s11128-011-0294-2 doi (NATIONALLICENCE)springer-10.1007/s11128-011-0294-2 Quantum information at the interface of light with atomic ensembles and micromechanical oscillators [Elektronische Daten] [Christine Muschik, Hanna Krauter, Klemens Hammerer, Eugene Polzik] This article reviews recent research towards a universal light-matter interface. Such an interface is an important prerequisite for long distance quantum communication, entanglement assisted sensing and measurement, as well as for scalable photonic quantum computation. We review the developments in light-matter interfaces based on room temperature atomic vapors interacting with propagating pulses via the Faraday effect. This interaction has long been used as a tool for quantum nondemolition detections of atomic spins via light. It was discovered recently that this type of light-matter interaction can actually be tuned to realize more general dynamics, enabling better performance of the light-matter interface as well as rendering tasks possible, which were before thought to be impractical. This includes the realization of improved entanglement assisted and backaction evading magnetometry approaching the Quantum Cramer-Rao limit, quantum memory for squeezed states of light and the dissipative generation of entanglement. A separate, but related, experiment on entanglement assisted cold atom clock showing the Heisenberg scaling of precision is described. We also review a possible interface between collective atomic spins with nano- or micromechanical oscillators, providing a link between atomic and solid state physics approaches towards quantum information processing. Springer Science+Business Media, LLC, 2011 Light matter interface nationallicence Atomic ensembles nationallicence Optomechanics nationallicence Muschik Christine Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse, 85748, Garching, Germany aut Krauter Hanna Niels Bohr Institute, Danish Quantum Optics Center QUANTOP, Copenhagen University, Blegdamsvej 17, 2100, Copenhagen, Denmark aut Hammerer Klemens Institute for Theoretical Physics, Institute for Gravitational Physics, Leibniz University Hanover, Callinstrasse 38, 30167, Hanover, Germany aut Polzik Eugene Niels Bohr Institute, Danish Quantum Optics Center QUANTOP, Copenhagen University, Blegdamsvej 17, 2100, Copenhagen, Denmark aut Quantum Information Processing Springer US; http://www.springer-ny.com 10/6(2011-12-01), 839-863 1570-0755 10:6<839 2011 10 11128 https://doi.org/10.1007/s11128-011-0294-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11128-011-0294-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Muschik Christine Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse, 85748, Garching, Germany aut NATIONALLICENCE 700 1- Krauter Hanna Niels Bohr Institute, Danish Quantum Optics Center QUANTOP, Copenhagen University, Blegdamsvej 17, 2100, Copenhagen, Denmark aut NATIONALLICENCE 700 1- Hammerer Klemens Institute for Theoretical Physics, Institute for Gravitational Physics, Leibniz University Hanover, Callinstrasse 38, 30167, Hanover, Germany aut NATIONALLICENCE 700 1- Polzik Eugene Niels Bohr Institute, Danish Quantum Optics Center QUANTOP, Copenhagen University, Blegdamsvej 17, 2100, Copenhagen, Denmark aut NATIONALLICENCE 773 0- Quantum Information Processing Springer US; http://www.springer-ny.com 10/6(2011-12-01), 839-863 1570-0755 10:6<839 2011 10 11128 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer