Annalen der Physik

Cover image for Vol. 18 Issue 7‐8

August 2009

Volume 18, Issue 7-8

Pages 463–603

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Historic Article
    6. Review Articles
    7. Original Paper
    1. Cover Picture: Ann. Phys. 7–8/2009

      Article first published online: 30 JUL 2009 | DOI: 10.1002/andp.200990008

  2. Contents

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Historic Article
    6. Review Articles
    7. Original Paper
    1. Contents: Ann. Phys. 7–8/2009 (pages 463–464)

      Article first published online: 30 JUL 2009 | DOI: 10.1002/andp.200918007

  3. Editorial

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Historic Article
    6. Review Articles
    7. Original Paper
    1. Editorial: Ann. Phys. 7–8/2008 (page 465)

      U. Eckern

      Article first published online: 30 JUL 2009 | DOI: 10.1002/andp.200918008

  4. Historic Article

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Historic Article
    6. Review Articles
    7. Original Paper
    1. Elementary processes with two quantum transitions (pages 466–479)

      M. Göppert-Mayer

      Article first published online: 30 JUL 2009 | DOI: 10.1002/andp.200910358

      Thumbnail image of graphical abstract

      Göttinger Dissertation. Reprint of “Über Elementarakte mit zwei Quantensprüngen”, Annalen der Physik 9 [401], 273–294 (1931). Translation by Daniel C. Koepke, Montana State University, Department of Physics, Bozeman, MT 59717-3840, USA; e-mail: dkoepke@physics.montana.edu

  5. Review Articles

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Historic Article
    6. Review Articles
    7. Original Paper
    1. Ultra-fast dynamics in solids: non-equilibrium behaviour of magnetism and atomic structure (pages 480–560)

      K.H. Bennemann

      Article first published online: 8 JUL 2009 | DOI: 10.1002/andp.200810354

      Non-equilibrium physics is of fundamental interest, for example, for extensions of statistical mechanics and thermodynamics. In particular, it is important to understand how conservation laws like energy conservation and angular-momentum conservation in magnetic solids control the time scale of the dynamics. Laser irradiation may cause intense electronic excitations and thus a strong non-equilibrium state. Results are presented for the ultra-fast response of magnetism in ferromagnetic transition metals like Ni, Co, Fe, and Gd and furthermore of the atomic structure in semiconductors like Si, Ge, and InSb. Non-thermal melting is a most spectacular example of ultra-fast bond breaking. Time-resolved magnetooptical experiments yielding sub-picosecond spin dynamics are discussed. The spin dynamics is accompanied by THz light emission. The structural changes in semiconductors, bond changes sp3 → s2p2, and phase transitions occur within about 100 fs. …

    2. Entanglement of spin chains with general boundaries and of dissipative systems (pages 561–584)

      T. Stauber and F. Guinea

      Article first published online: 7 JUL 2009 | DOI: 10.1002/andp.200910357

      Thumbnail image of graphical abstract

      We analyze the entanglement properties of spins (qubits) close to the boundary of spin chains in the vicinity of a quantum critical point and show that the concurrence at the boundary is significantly different from the one of bulk spins. We also discuss the von Neumann entropy of dissipative environments in the vicinity of a (boundary) critical point, such as two Ising-coupled Kondo-impurities or the dissipative two-level system. Our results indicate that the entanglement (concurrence and/or von Neumann entropy) changes abruptly at the point where coherent quantum oscillations cease to exist. The phase transition modifies significantly less the entanglement if no symmetry breaking field is applied and we argue that this might be a general property of the entanglement of dissipative systems. We finally analyze the entanglement of an harmonic chain between the two ends as function of the system size.

  6. Original Paper

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Historic Article
    6. Review Articles
    7. Original Paper
    1. (0,2) Gauged linear sigma model on supermanifold (pages 585–603)

      Y. Okame and M.J. Hayashi

      Article first published online: 7 JUL 2009 | DOI: 10.1002/andp.200910359

      We construct (0,2), D = 2 gauged linear sigma model on supermanifold with both an Abelian and non-Abelian gauge symmetry. For the purpose of checking the exact supersymmetric (SUSY) invariance of the Lagrangian density, it is convenient to introduce a new operator equation image for the Abelian gauge group. The equation image operator provides consistency conditions for satisfying the SUSY invariance. On the other hand, it is not essential to introduce a similar operator in order to check the exact SUSY invariance of the Lagrangian density of non-Abelian model, contrary to the Abelian one. However, we still need a new operator in order to define the (0,2) chirality conditions for the (0,2) chiral superfields. The operator equation image can be defined from the conditions assuring the (0,2) supersymmetric invariance of the Lagrangian density in superfield formalism for the (0,2) U(N) gauged linear sigma model.

SEARCH

SEARCH BY CITATION