• A generic gust definition and detection method based on wavelet-analysis 

  Knoop, Helge; Ament, Felix; Maronga, Björn (Berlin : European Meteorological Society, 2019)

  Wind gusts can have destructive effects on many structures and objects deemed valuable to humans. The aviation industry, for example, views gusts as a major hazard. Their destructive effect is proportional to the momentum ...
• OptFROG — Analytic signal spectrograms with optimized time–frequency resolution 

  Melchert, O.; Roth, B.; Morgner, U.; Demircan, A. (Amsterdam : Elsevier B.V., 2019)

  A Python package for the calculation of spectrograms with optimized time and frequency resolution for application in the analysis of numerical simulations on ultrashort pulse propagation is presented. Gabor’s uncertainty ...
• Experimental demonstration of surface plasmon polaritons reflection and transmission effects 

  Zheng, Lei; Zywietz, Urs; Evlyukhin, Andrey; Roth, Bernhard; Overmeyer, Ludger; Reinhardt, Carsten (Basel : MDPI AG, 2019)

  Special integrated photonic surface structures composed of a dielectric semicircle ridge and a dielectric block placed on a metal substrate are proposed for the investigation of surface plasmon polariton (SPP) reflection ...
• Quantum Cryptography as a Retrodiction Problem 

  Werner, A. H.; Franz, T.; Werner, R.F. (College Park, MD : American Physical Society, 2009)

  We propose a quantum key distribution protocol based on a quantum retrodiction protocol, known as the Mean King problem. The protocol uses a two way quantum channel. We show security against coherent attacks in a ...
• Connes' embedding problem and Tsirelson's problem 

  Junge, M.; Navascues, M.; Palazuelos, C.; Perez-Garcia, D.; Scholz, V. B.; Werner, R.F. (College Park, MD : American Institute of Physics, 2011)

  We show that Tsirelson's problem concerning the set of quantum correlations and Connes' embedding problem on finite approximations in von Neumann algebras (known to be equivalent to Kirchberg's QWEP conjecture) are essentially ...
• Strong Einstein-Podolsky-Rosen entanglement from a single squeezed light source 

  Eberle, Tobias; Händchen, Vitus; Duhme, Jörg; Franz,Torsten; Werner, Reinhard F.; Schnabel, Roman (College Park, MD : American Physical Society, 2011)

  Einstein-Podolsky-Rosen (EPR) entanglement is a criterion that is more demanding than just certifying entanglement. We theoretically and experimentally analyze the low-resource generation of bipartite continuous-variable ...
• Quantum Walks with Nonorthogonal Position States 

  Matjeschk, R.; Ahlbrecht, A.; Enderlein, M.; Cedzich, Ch.; Werner, A.H.; Keyl, M.; Schaetz, T.; Werner, R.F. (College Park, MD : American Physical Society, 2012)

  Quantum walks have by now been realized in a large variety of different physical settings. In some of these, particularly with trapped ions, the walk is implemented in phase space, where the corresponding position states ...
• Maximal violation of Bell inequalities by position measurements 

  Kiukas, J.; Werner, R.F. (College Park, MD : American Institute of Physics, 2010)

  We show that it is possible to find maximal violations of the Clauser-Horne-Shimony-Holt (CHSH) Bell inequality using only position measurements on a pair of entangled nonrelativistic free particles. The device settings ...
• Time asymptotics and entanglement generation of Clifford quantum cellular automata 

  Gütschow, Johannes; Uphoff, Sonja; Werner, Reinhard F.; Zimborás, Zoltán (College Park, MD : American Institute of Physics, 2010)

  We consider Clifford quantum cellular automata (CQCAs) and their time-evolution. CQCAs are an especially simple type of quantum cellular automata, yet they show complex asymptotics and can even be a basic ingredient for ...
• Extremal Quantum Correlations and Cryptographic Security 

  Franz, T.; Furrer, F.; Werner, R.F. (College Park, MD : American Physical Society, 2011)

  We investigate a fundamental property of device-independent security in quantum cryptography by characterizing probability distributions which are necessarily independent of the measurement results of any eavesdropper. We ...
• Full counting statistics of stationary particle beams 

  Kiukas, J.; Ruschhaupt, A.; Werner, R.F. (College Park, MD : American Institute of Physics, 2013)

  We present a general theoretical framework for treating particle beams as time-stationary limits of many particle systems. Due to stationarity, the total particle number diverges, and a description in Fock space is no ...
• Continuous Variable Quantum Key Distribution: Finite-Key Analysis of Composable Security against Coherent Attacks 

  Furrer, F.; Franz, T.; Berta, M.; Leverrier, A.; Scholz, V. B.; Tomamichel, M.; Werner, R.F. (College Park, MD : American Physical Society, 2012)

  We provide a security analysis for continuous variable quantum key distribution protocols based on the transmission of two-mode squeezed vacuum states measured via homodyne detection. We employ a version of the entropic ...
• Characterization of informational completeness for covariant phase space observables 

  Kiukas, J.; Lahti, P.; Schultz, J.; Werner, R.F. (College Park, MD : American Institute of Physics, 2012)

  In the nonrelativistic setting with finitely many canonical degrees of freedom, a shift-covariant phase space observable is uniquely characterized by a positive operator of trace one and, in turn, by the Fourier-Weyl ...
• Electric Quantum Walks with Individual Atoms 

  Genske, Maximilian; Alt, Wolfgang; Steffen, Andreas; Werner, Albert H.; Werner, Reinhard F.; Meschede, Dieter; Alberti, Andrea (College Park, MD : American Physical Society, 2013)

  We report on the experimental realization of electric quantum walks, which mimic the effect of an electric field on a charged particle in a lattice. Starting from a textbook implementation of discrete-time quantum walks, ...
• Proof of Heisenberg's error-disturbance relation 

  Busch, Paul; Lahti,Pekka; Werner, Reinhard F. (College Park, MD : American Physical Society, 2013)

  While the slogan “no measurement without disturbance” has established itself under the name of the Heisenberg effect in the consciousness of the scientifically interested public, a precise statement of this fundamental ...
• Propagation of Quantum Walks in Electric Fields 

  Cedzich, C.; Rybár, T.; Werner, A. H.; Alberti, A.; Genske, M.; Werner, R.F. (College Park, MD : American Physical Society, 2013)

  We study one-dimensional quantum walks in a homogenous electric field. The field is given by a phase which depends linearly on position and is applied after each step. The long time propagation properties of this system, ...
• Heisenberg uncertainty for qubit measurements 

  Busch, Paul; Lahti, Pekka; Werner, Reinhard F. (College Park, MD : American Physical Society, 2014)

  Reports on experiments recently performed in Vienna [Erhard et al., Nature Phys. 8, 185 (2012)] and Toronto [Rozema et al., Phys. Rev. Lett. 109, 100404 (2012)] include claims of a violation of Heisenberg's error-disturbance ...
• Colloquium: Quantum root-mean-square error and measurement uncertainty relations 

  Busch, Paul; Lahti,Pekka; and Reinhard F. Werner (College Park, MD : American Physical Society, 2014)

  Recent years have witnessed a controversy over Heisenberg’s famous error-disturbance relation. Here the conflict is resolved by way of an analysis of the possible conceptualizations of measurement error and disturbance in ...
• Measurement uncertainty relations. 

  Busch, Paul; Lahti, Pekka; Werner, Reinhard F. (College Park, MD : American Institute of Physics, 2014)

  Measurement uncertainty relations are quantitative bounds on the errors in an approximate joint measurement of two observables. They can be seen as a generalization of the error/disturbance tradeoff first discussed ...
• Continuous Variable Quantum Key Distribution: Finite-Key Analysis of Composable Security against Coherent Attacks 

  Furrer, F.; Franz, T.; Berta, M.; Leverrier, A.; Scholz, V.B.; Tomamichel, M.; Werner, R.F. (College Park, MD : American Physical Society, 2012)

  We provide a security analysis for continuous variable quantum key distribution protocols based on the transmission of two-mode squeezed vacuum states measured via homodyne detection. We employ a version of the entropic ...

View more