• Index statistical properties of sparse random graphs 

      Metz, Fernando Lucas; Stariolo, Daniel Adrian (2015) [Artigo de periódico]
      Using the replica method, we develop an analytical approach to compute the characteristic function for the probability PN(K,λ) that a large N × N adjacency matrix of sparse random graphs has K eigenvalues below a threshold ...
    • Lattice dynamics and spin-phonon coupling in CaMn2O4 : a raman study 

      Ivanov, V. G.; Hadjiev, Viktor G.; Lytvynchuk, Alexander P.; Dimitrov, D. Z.; Shivachev, Boris Lubomirov; Abrashev, Miroslav Vergilov; Lorenz, Bernd; Iliev, Milko N. (2014) [Artigo de periódico]
      We present polarized Raman spectra of CaMn2O4 (marokite) measured in several exact scattering configurations from oriented single crystals. Most of the 11Ag + 12B1g + 10B2g + 9B3g Raman-allowed modes are identified and ...
    • Semiclassical structure of chaotic resonance eigenfunctions 

      Keating, Jonathan Philipe; Novaes, Marcel; Prado, Sandra Denise; Sieber, M. (2006) [Artigo de periódico]
      We study the resonance (or Gamow) eigenstates of open chaotic systems in the semiclassical limit, distinguishing between left and right eigenstates of the nonunitary quantum propagator and also between short-lived and ...