Journal Article10.1134/S0030400X09060149
Quantum memory for images with feedback
TL;DR: In this paper, a spatially multimode scheme of the quantum memory for light is presented that can be considered to be a thin hologram, whose long-lived spin subsystem of a multiatomic ensemble stores image peculiarities such as the multimode superposition and entangled quantum states, which is unattainable for ordinary holography.
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Abstract: A spatially multimode scheme of the quantum memory for light is presented that can be considered to be a thin hologram, whose long-lived spin subsystem of a multiatomic ensemble stores image peculiarities, such as the multimode superposition and entangled quantum states, which is unattainable for ordinary holography. In the recording process, the measurement of polarization parameters of the transmitted light wave and the feedback are used for the action on an ensemble of fixed atoms (obtained, for example, by means of the laser cooling). The information capacity of a quantum hologram with a feedback will considerably exceed that of a spatially singlemode quantum memory.
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Efficiency of quantum volume hologram
TL;DR: In this paper, the authors proposed to use for the forward-propagating retrieval the signal temporal eigenmodes of the whole write-in and readout memory cycle, which allows for better efficiencies for given physical parameters of the scheme, and, hence, for higher quantum capacity of parallel quantum memory.
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References
Quantum Information with Continuous Variables
TL;DR: In this article, the authors present the Deutsch-Jozsa algorithm for continuous variables, and a deterministic version of it is used for quantum information processing with continuous variables.
Inseparability Criterion for Continuous Variable Systems
TL;DR: An inseparability criterion based on the total variance of a pair of Einstein-Podolsky-Rosen type operators is proposed for continuous variable systems and turns out to be a necessary and sufficient condition for inseparability.
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Quantum teleportation between light and matter
Jacob F. Sherson,H. Krauter,Rasmus K. Olsson,Brian Julsgaard,Klemens Hammerer,Ignacio Cirac,Eugene S. Polzik +6 more
TL;DR: The teleportation of a quantum state between two single material particles (trapped ions) has now also been achieved and is demonstrated between objects of a different nature—light and matter, which respectively represent ‘flying’ and ‘stationary’ media.
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Electromagnetically induced transparency with tunable single-photon pulses
Matthew D. Eisaman,A. André,F. Massou,Michael Fleischhauer,Michael Fleischhauer,Alexander S. Zibrov,Mikhail D. Lukin +6 more
TL;DR: This work demonstrates the use of EIT for the controllable generation, transmission and storage of single photons with tunable frequency, timing and bandwidth and probes the spectral and quantum statistical properties of narrow-bandwidth single-photon pulses, revealing that their quantum nature is preserved under EIT propagation and storage.
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Quantum information processing and communication: strategic report on current status, visions and goals for research in Europe
Peter Zoller,Peter Zoller,Thomas Beth,Daniele Binosi,Daniele Binosi,Rainer Blatt,Rainer Blatt,Hans J. Briegel,Hans J. Briegel,Dagmar Bruss,Tommaso Calarco,Tommaso Calarco,J. I. Cirac,J. I. Cirac,David Deutsch,Jens Eisert,Jens Eisert,Artur Ekert,Claude Fabre,Claude Fabre,Nicolas Gisin,P. Grangiere,Markus Grassl,Markus Grassl,Serge Haroche,Atac Imamoglu,A. Karlson,Julia Kempe,Julia Kempe,Leo P. Kouwenhoven,Stefan Kröll,Gerd Leuchs,Maciej Lewenstein,Daniel Loss,Norbert Lütkenhaus,Norbert Lütkenhaus,Serge Massar,J. E. Mooij,Martin B. Plenio,Eugene S. Polzik,Sandu Popescu,Gerhard Rempe,Gerhard Rempe,Alexander V. Sergienko,David Suter,David Suter,John Twamley,Göran Wendin,Reinhard F. Werner,Andreas Winter,Jörg Wrachtrup,Jörg Wrachtrup,Anton Zeilinger +52 more
TL;DR: In this paper, the authors present an excerpt of the document "Quantum Information Processing and Communication: Strategic report on current status, visions and goals for research in Europe", which has been recently published in electronic form at the website of FET (the Future and Emerging Technologies Unit of the Directorate General Information Society of the European Commission).