Fortschritte der Physik

Cover image for Vol. 61 Issue 6

June 2013

Volume 61, Issue 6

Pages 667–700

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Contents
    5. Original Papers
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      Cover Picture: Fortschritte der Physik 6 / 2013

      Version of Record online: 3 JUN 2013 | DOI: 10.1002/prop.201390006

      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. 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. Original Papers
    1. You have free access to this content
  4. Original Papers

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Contents
    5. Original Papers
    1. Quantum field theory analysis of polarizations correlations, entanglement and Bell's inequality: explicit processes (pages 668–684)

      N. Yongram and E.B. Manoukian

      Version of Record online: 5 NOV 2012 | DOI: 10.1002/prop.201200137

      This paper provides quantum field theory computations of polarization correlations in several dynamical theries. The novel properties depend on the speed oft the colliding particles, on coupling parameters ratios and on mass ratios of the underlying theory. It turns out that arguments based only spin combination to generate polarization correlations are not reliable.

    2. Implications of minimum-length deformed quantum mechanics for QFT/QG (pages 685–700)

      M. Maziashvili

      Version of Record online: 8 JAN 2013 | DOI: 10.1002/prop.201200139

      After picking out what may be a more realistic minimal gravitational deformation of quantum mechanics, its back reaction on gravity are studied. The large distance behaviour of Newtonian potential coincides with the result obtained by using an effective field theory approach to general relativity.

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