Fortschritte der Physik

Cover image for Vol. 61 Issue 1

January 2013

Volume 61, Issue 1

Pages 1–49

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Contents
    5. Editorial
    6. Original Papers
    1. You have free access to this content
      Cover Picture: Fortschritte der Physik 1 / 2013

      Version of Record online: 3 JAN 2013 | DOI: 10.1002/prop.201390000

      Thumbnail image of graphical abstract

      The cover page shows snapshots of a decaying Schrödinger cat Wigner function. This is a quasi-probability distribution for the amplitude of a microwave field stored in an ultra-high quality superconducting cavity. A single circular Rydberg atom interacting with a coherent state produces a quantum superposition of two fields with different phases. The two positive peaks in the Wigner function (front) are centered on the classical amplitudes of these components. The interference pattern in-between indicates the quantum nature of the superposition. As time proceeds (from front to rear), the interference pattern vanishes, revealing the rapid decoherence of a mesoscopic quantum state superposition.

  2. Issue Information

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Contents
    5. Editorial
    6. Original Papers
    1. You have free access to this content
  3. Contents

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Contents
    5. Editorial
    6. Original Papers
    1. You have free access to this content
  4. Editorial

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Contents
    5. Editorial
    6. Original Papers
    1. You have free access to this content
      Editorial: Fortschritte der Physyk 1 / 2013 (page 3)

      D. Lüst and W. P. Schleich

      Version of Record online: 3 JAN 2013 | DOI: 10.1002/prop.201306113

  5. Original Papers

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Contents
    5. Editorial
    6. Original Papers
    1. Shape invariance in phase space (pages 4–19)

      C. Rasinariu

      Version of Record online: 5 JUL 2012 | DOI: 10.1002/prop.201200102

      Thumbnail image of graphical abstract

      Shape invariance is a powerful solvability condition that allows for complete knowledge of the energy spectrum and eigenfunctions of a system. This paper explores the implications of the supersymmetric quantum mechanics and shape invariance techniques to the phase space formalism.

    2. Brane singularities with mixtures in the bulk (pages 20–49)

      I. Antoniadis, S. Cotsakis and I. Klaoudatou

      Version of Record online: 22 JUN 2012 | DOI: 10.1002/prop.201200103

      By extending previous analysis of the authors, a systematic study of the singularity structure and possible asymptotic behaviors of five-dimensional braneworld solutions is performed in the case where the bulk is a mixture of an analog of perfect fluid (with a density and pressure depending on the extra coordinate) and a massless scalar field.

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