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We present a continuous-space version of Infotaxis, a search algorithm where a searcher greedily moves to maximize the gain in information about the position of the target to be found. Using a combination of analytical and numerical tools we study the nature of the trajectories in two and three dimensions. The probability that the search is successful andâ€¦ (More)

- M. A. Furst, Tobias Schmitt-Manderbach, +10 authors Harald Weinfurter
- OFC/NFOEC 2008 - 2008 Conference on Optical Fiberâ€¦
- 2008

Quantum cryptography, the only method which can provide quantifiable security of a distributed key, became the first application of quantum information methods. Complementary to fiber based systems, free space optics enables one to establish a secure key in various new scenarios,e.g., authentication to money machines or short distance links in metropolitanâ€¦ (More)

We extend the self-consistent Greenâ€™s functions formalism to take into account three-body interactions. We analyze the perturbative expansion in terms of Feynman diagrams and define effective oneand two-body interactions, which allows for a substantial reduction of the number of diagrams. The procedure can be taken as a generalization of the normal orderingâ€¦ (More)

S. J. Waldecker,1 C. Barbieri,2,3,* and W. H. Dickhoff1 1Department of Physics, Washington University, St. Louis, Missouri 63130, USA 2Department of Physics, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom 3Theoretical Nuclear Physics Laboratory, RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitamaâ€¦ (More)

- Carlo Barbieri, Simona Cocco, Thomas Jorg, RÃ©mi Monasson
- Biophysical journal
- 2014

Two methods for reconstructing the free-energy landscape of a DNA molecule from the knowledge of the equilibrium unzipping force versus extension signal are introduced: a simple and fast procedure, based on a parametric representation of the experimental force signal, and a maximum-likelihood inference of coarse-grained free-energy parameters. In addition,â€¦ (More)

- Carlo Barbieri, Simona Cocco, RÃ©mi Monasson, Francesco Zamponi
- Physical biology
- 2009

We present a dynamical model of DNA mechanical unzipping under the action of a force. The model includes the motion of a fork in a sequence-dependent landscape, the trap(s) acting on the bead(s) and the polymeric components of the molecular construction (unzipped single strands of DNA and linkers). Different setups are considered to test the model, and theâ€¦ (More)

- Carlo Barbieri, N. Paar, Ronny Roth
- 2007

where E PT is the contribution to the total binding energy in second order perturbation theory. A perturbative expansion of the RPA equations shows that (i) the sum in Eq. (1) must also include charge exchange modes and (ii) E PT is double counted and must be subtracted [3]. This leads to an improved description of the binding energies of most closed shellâ€¦ (More)

Calculations of the one-hole spectral function of 16 O for small missing energies are reviewed. The self-consistent Green's function approach is employed together with the Faddeev equations technique in order to study the coupling of both particle-particle and particle-hole phonons to the single-particle motion. The results indicate that the characteristicsâ€¦ (More)

The spectral function of the closed-shell neon atom is computed by expanding the electron self-energy through a set of Faddeev equations. This method describes the coupling of single-particle degrees of freedom with correlated two-electron, two-hole, and electron-hole pairs. The excitation spectra are obtained using the random-phase approximation RPA ,â€¦ (More)

- Yael NazÃ©, Y. Damerdji, +7 authors Carlo Barbieri