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• "Observation of shell effects in superconducting nanoparticles of Sn", Bose, Garcia-Garcia, Ugeda, Urbina, Michaelis, Brihuega, Kern, 2010

  Publication

  In a zero-dimensional superconductor, quantum size effects(1,2) (QSE) not only set the limit to superconductivity, but are also at the heart of new...

  Publication on epub.uni-regensburg.de: "Observation of shell effects in superconducting nanoparticles of Sn" (external link, opens in a new window)

• "BCS superconductivity in metallic nanograins: Finite-size corrections, low-energy excitations, and robustness of shell effects", Garcia-Garcia, Urbina, Richter, Yuzbashyan, Altshuler, 2011

  Publication

  We combine the BCS self-consistency condition, a semiclassical expansion for the spectral density and interaction matrix elements to describe...

  Publication on epub.uni-regensburg.de: "BCS superconductivity in metallic nanograins: Finite-size corrections, low-energy excitations, and robustness of shell effects" (external link, opens in a new window)

• "Quantifying entanglement in multipartite conditional states of open quantum systems by measurements of their photonic environment", Urbina, Strunz, Viviescas, 2012

  Publication

  A key lesson of the decoherence program is that information flowing out froman open system is stored in the quantum state of the...

  Publication on epub.uni-regensburg.de: "Quantifying entanglement in multipartite conditional states of open quantum systems by measurements of their photonic environment" (external link, opens in a new window)

• "Weak localization with nonlinear bosonic matter waves", Hartmann, Michl, Petitjean, Wellens, Urbina, Richter, Schlagheck, 2012

  Publication

  We investigate the coherent propagation of dilute atomic Bose-Einstein condensates through irregularly shaped billiard geometries that are attached to...

  Publication on epub.uni-regensburg.de: "Weak localization with nonlinear bosonic matter waves" (external link, opens in a new window)

• "Intensity distribution of non-linear scattering states", Hartmann, Urbina, Richter, Schlagheck, 2012

  Publication

  We investigate the interplay between coherent effects characteristic of the propagation of linear waves, the non-linear effects due to interactions,...

  Publication on epub.uni-regensburg.de: "Intensity distribution of non-linear scattering states" (external link, opens in a new window)

• "Universal spatial correlations in random spinor fields", Urbina, Richter, Adagideli, Wimmer, Bauernfeind, Espitia, 2013

  Publication

  We identify universal spatial fluctuations in systems with nontrivial spin dynamics. To this end we calculate by exact numerical diagonalization a...

  Publication on epub.uni-regensburg.de: "Universal spatial correlations in random spinor fields" (external link, opens in a new window)

• "Random quantum states: recent developments and applications", Urbina, Richter, 2013

  Publication

  We review the methods and use of random quantum states with particular emphasis on recent theoretical developments and applications in various fields....

  Publication on epub.uni-regensburg.de: "Random quantum states: recent developments and applications" (external link, opens in a new window)

• "The Weyl expansion for systems of independent identical particles", Hummel, Urbina, Richter, 2013

  Publication

  We present a novel analytical approach for the calculation of the mean density of states in many-body systems consisting of confined indistinguishable...

  Publication on epub.uni-regensburg.de: "The Weyl expansion for systems of independent identical particles" (external link, opens in a new window)

• "Coherent Backscattering in Fock Space: a Signature of Quantum Many-Body Interference in Interacting Bosonic Systems", Engl, Dujardin, Argüelles, Schlagheck, Richter, Urbina, 2014

  Publication

  We predict a generic signature of quantum interference in many-body bosonic systems resulting in a coherent enhancement of the average return...

  Publication on epub.uni-regensburg.de: "Coherent Backscattering in Fock Space: a Signature of Quantum Many-Body Interference in Interacting Bosonic Systems" (external link, opens in a new window)

• "The semiclassical propagator in fermionic Fock space", Engl, Plößl, Urbina, Richter, 2014

  Publication

  We present a rigorous derivation of a semiclassical propagator for anticommuting (fermionic) degrees of freedom, starting from an exact representation...

  Publication on epub.uni-regensburg.de: "The semiclassical propagator in fermionic Fock space" (external link, opens in a new window)