• Publications
  • Influence
Focusing light to a tighter spot
Abstract The smallest spot sizes are reached by focusing an annular shaped light beam with a high aperture lens. We show theoretically that the focal area is further reduced when using a novelExpand
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Colloquium: The Einstein-Podolsky-Rosen paradox: From concepts to applications
This Colloquium examines the field of the Einstein, Podolsky, and Rosen (EPR) gedanken experiment, from the original paper of Einstein, Podolsky, and Rosen, through to modern theoretical proposals ofExpand
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Quantum information processing and communication
We 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, http://www.cordis.lu/ist/fet/qipc-sr.htm). Expand
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A generator for unique quantum random numbers based on vacuum states
Researchers demonstrate random-number generation by exploiting the intrinsic randomness of vacuum states. The approach may lead to reliable and high-speed quantum random-number generators forExpand
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Observation of optical polarization Möbius strips
Light with twist and structure Möbius strips are three-dimensional structures consisting of a surface with just a single side. Readily demonstrated by snipping a paper ring, adding a twist, and thenExpand
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Quantum information with continuous variables of atoms and light
Bipartite and Multipartite Entanglement of Gaussian States (G Adesso & F Illuminati) Gaussian Quantum Channels (J Eisert & M M Wolf) Entanglement in Systems of Interacting Harmonic Oscillators (K M RExpand
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Lectures on Quantum Information
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Perfect excitation of a matter qubit by a single photon in free space
We propose a scheme for perfect excitation of a single two-level atom by a single photon in free space. The photon state has to match the time reversed photon state originating from spontaneous decayExpand
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The focus of light—linear polarization breaks the rotational symmetry of the focal spot
Abstract We experimentally demonstrate for the first time that a linearly polarized beam is focused to an asymmetric spot when using a high-numerical aperture focusing system. This asymmetry wasExpand
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Classical entanglement in polarization metrology
Quantum approaches relying on entangled photons have been recently proposed to increase the efficiency of optical measurements. We demonstrate here that, surprisingly, the use of classical light withExpand
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