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  • Resonant Kelvin-Helmholtz modes in sheared relativistic flows 
    Perucho, Manuel; Hanasz, Michał; Marti, Jose-Maria; Miralles, Juan-Antonio (2007-05-03)
    Qualitatively new aspects of the (linear and non-linear) stability of sheared relativistic (slab) jets are analyzed. The linear problem has been solved for a wide range of jet models well inside the ultrarelativistic domain ...
  • On circulant states with positive partial transpose 
    Chruściński, Dariusz; Kossakowski, Andrzej (2007-06-13)
    We construct a large class of quantum "d x d" states which are positive under partial transposition (so called PPT states). The construction is based on certain direct sum decomposition of the total Hilbert space displaying ...
  • Multipartite circulant states with positive partial transposes 
    Chruściński, Dariusz; Kossakowski, Andrzej (2007-10-10)
    We construct a large class of multipartite qudit states which are positive under the family of partial transpositions. The construction is based on certain direct sum decomposition of the total Hilbert space displaying ...
  • Quantum states with strong positive partial transpose 
    Chruściński, Dariusz; Jurkowski, Jacek; Kossakowski, Andrzej (2007-10-10)
    We construct a large class of bipartite M x N quantum states which defines a proper subset of states with positive partial transposes (PPT). Any state from this class is PPT but the positivity of its partial transposition ...
  • Discussion of the Electromotive Force Terms in the Model of Parker-unstable Galactic Disks with Cosmic Rays and Shear 
    Otmianowska-Mazur, Katarzyna; Kowal, Grzegorz; Hanasz, Michał (2007-10-17)
    We analyze the electromotive force (EMF) terms and basic assumptions of the linear and nonlinear dynamo theories in our three-dimensional (3D) numerical model of the Parker instability with cosmic rays and shear in a ...
  • A class of positive atomic maps 
    Chruściński, Dariusz; Kossakowski, Andrzej (2007-11-28)
    We construct a new class of positive indecomposable maps in the algebra of `d x d' complex matrices. These maps are characterized by the `weakest' positivity property and for this reason they are called atomic. This class ...
  • Memory in a nonlocally damped oscillator 
    Chruściński, Dariusz; Jurkowski, Jacek (2007-12-07)
    We analyze the new equation of motion for the damped oscillator. It differs from the standard one by a damping term which is nonlocal in time and hence it gives rise to a system with memory. Both classical and quantum ...
  • How to construct entanglement witnesses 
    Chruściński, Dariusz; Kossakowski, Andrzej (2007-12-07)
    We present very simple method for constructing indecomposable entanglement witnesses out of a given pair -- an entanglement witness W and the corresponding state detected by W. This method may be used to produce new classes ...
  • Initial Magnetization of Galaxies by Exploding, Magnetized Stars 
    Kowalik, Kacper; Hanasz, Michał (2007-12-14)
    We conduct a series of magnetohydrodynamical (MHD) simulations of magnetized interstellar medium (ISM) disturbed by exploding stars. Each star deposits a randomly oriented, dipolar magnetic field into ISM. The simulations ...
  • Chronostratigraphy of the Vistulian Glaciation (Weichselian) on the Kujawy Moraine Plateau (Central Poland) Based on Lithostratigraphic Research and OSL Dating 
    Przegiętka, Krzysztof; Chruścińska, Alicja; Oczkowski, Hubert Lucjan; Molewski, Paweł (Versita, 2008)
    The subject of the investigations presented here is fixing dilemmatic character (transgressive or recessive) of the Poznań phase of the Vistulian (Weichselian) Glaciation and answering the question about the possibility ...
  • Praktyczna analiza sieci komputerowych z wykorzystaniem programu Wireshark 
    Piwiński, Mariusz (Wydział Matematyki i Informatyki Uniwersytetu Mikołaja Kopernika w Toruniu, Polskie Towarzystwo Informatyczne, 2008)
    Życie w społeczeństwie informatycznym skutkuje wszechobecnością komputerów. Stały się one niezbędnym narzędziem wykorzystywanym w codziennej pracy zawodowej oraz w życiu prywatnym. Szybki rozwój technologiczny sprawił, że ...
  • Using the TL Single-Aliquot Regenerative-Dose Protocol for the Verification of the Chronology of the Teutonic Order Castle in Malbork 
    Chruścińska, Alicja; Jesionowski, Bernard; Oczkowski, Hubert Lucjan; Przegiętka, Krzysztof (GADAM Centre, Institute of Physics, Silesian University of Technology, 2008)
    The Teutonic Order Castle in Malbork is one of the precious medieval monuments in Europe. Because of the lack of natural rock resources in Pomerania, its walls are built almost exclusively of bricks. The huge volume and ...
  • Generalized Circulant Densities and a Sufficient Condition for Separability 
    Chruściński, Dariusz; Pittenger, Arthur O. (2008-08-26)
    In a series of papers with Kossakowski, the first author has examined properties of densities for which the positive partial transpositrionm (PPT) property can be readily checked. These densities were also investigated ...
  • Spectral conditions for positive maps 
    Chruściński, Dariusz; Kossakowski, Andrzej (2008-09-29)
    We provide a partial classification of positive linear maps in matrix algebras which is based on a family of spectral conditions. This construction generalizes celebrated Choi example of a map which is positive but not ...
  • Remarks on the GNS Representation and the Geometry of Quantum States 
    Chruściński, Dariusz; Marmo, Giuseppe (2008-10-09)
    It is shown how to introduce a geometric description of the algebraic approach to the non-relativistic quantum mechanics. It turns out that the GNS representation provides not only symplectic but also Hermitian realization ...
  • Parameterizing density matrices for composite quantum systems 
    Bruening, Erwin; Chruściński, Dariusz; Petruccione, Francesco (2008-10-14)
    A parametrization of density operators for bipartite quantum systems is proposed. It is based on the particular parametrization of the unitary group found recently by Jarlskog. It is expected that this parametrization will ...
  • PIERNIK mhd code - a multi-fluid, non-ideal extension of the relaxing-TVD scheme (I) 
    Hanasz, Michał; Kowalik, Kacper; Wóltański, Dominik; Pawłaszek, Rafał (2008-12-11)
    We present a new multi-fluid, grid MHD code PIERNIK, which is based on the Relaxing TVD scheme. The original scheme has been extended by an addition of dynamically independent, but interacting fluids: dust and a diffusive ...
  • Can the cosmic-ray driven dynamo model explain the observations of the polarized emission of edge-on galaxies? 
    Otmianowska-Mazur, Katarzyna; Soida, Marian; Kulesza-Żydzik, Barbara; Hanasz, Michał; Kowal, Grzegorz (2008-12-11)
    In the present paper we construct maps of polarized synchrotron radio emission of a whole galaxy, based on local models of the cosmic ray (CR) driven dynamo. We perform numerical simulations of the dynamo in local Cartesian ...
  • PIERNIK mhd code - a multi-fluid, non-ideal extension of the relaxing-TVD scheme (II) 
    Hanasz, Michał; Kowalik, Kacper; Wóltański, Dominik; Pawłaszek, Rafał; Kornet, Kacper (2008-12-15)
    We present a new multi-fluid, grid MHD code PIERNIK, which is based on the Relaxing TVD scheme (Jin and Xin, 1995). The original scheme (see Trac & Pen (2003) and Pen et al. (2003)) has been extended by an addition of ...
  • Cosmic ray driven dynamo in galactic disks. A parameter study 
    Hanasz, Michał; Otmianowska-Mazur, Katarzyna; Kowal, Grzegorz; Lesch, Harald (2008-12-19)
    We present a parameter study of the magnetohydrodynamical dynamo driven by cosmic rays in the interstellar medium (ISM) focusing on the efficiency of magnetic field amplification and the issue of energy equipartition between ...