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@INPROCEEDINGS{Espriu:408350,
      author       = {Espriu, D. and Renau, A.},
      title        = {{P}hoton propagation in a cold axion condensate},
      address      = {Hamburg},
      publisher    = {Verlag Deutsches Elektronen-Synchrotron},
      reportid     = {PUBDB-2018-02803, DESY-PROC-2013-04},
      isbn         = {978-3-935702-83-6},
      series       = {DESY-PROC},
      pages        = {145-151},
      year         = {2013},
      comment      = {Espriu, D. "Photon propagation in a cold axion condensate"
                      in Proceedings, 9th Patras Workshop on Axions, WIMPs and
                      WISPs (AXION-WIMP 2013) / Oberlack, Uwe, Sissol, Pierre
                      (eds.), 2013 ; AXION-WIMP 2013 : 9th Patras Workshop on
                      Axions, WIMPs and WISPs , 2013-06-23 - 2013-06-28, Mainz},
      booktitle     = {Espriu, D. "Photon propagation in a
                       cold axion condensate" in Proceedings,
                       9th Patras Workshop on Axions, WIMPs
                       and WISPs (AXION-WIMP 2013) / Oberlack,
                       Uwe, Sissol, Pierre (eds.), 2013 ;
                       AXION-WIMP 2013 : 9th Patras Workshop
                       on Axions, WIMPs and WISPs , 2013-06-23
                       - 2013-06-28, Mainz},
      abstract     = {We discuss some striking properties of photons propagating
                      in a cold axion condensate oscillating coherently in time
                      with a frequency $1/m_a$. Three effects are discussed in
                      this contribution: (a) due to the time dependence of the
                      background, photons moving in the cold axion background have
                      no definite energies and some momenta are not accessible to
                      them. (b) we investigate the combined influence of a
                      magnetic field and the cold axion background and propose a
                      possible interferometric experiment to detect the latter.
                      (c) if the axion condensate has a space dependence, the
                      photon refraction index is modified in the medium, possibly
                      leading to total reflection at the interface with the
                      ordinary vacuum.},
      month         = {Jun},
      date          = {2013-06-24},
      organization  = {9th Patras Workshop on Axions, WIMPs
                       and WISPs, Mainz (Germany), 24 Jun 2013
                       - 28 Jun 2013},
      keywords     = {Hypothetisches Teilchen (gnd)},
      cin          = {L},
      cid          = {I:(DE-H253)L-20120731},
      pnm          = {899 - ohne Topic (POF3-899)},
      pid          = {G:(DE-HGF)POF3-899},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)29 / PUB:(DE-HGF)8 / PUB:(DE-HGF)7},
      doi          = {10.3204/DESY-PROC-2013-04/espriu_domenec},
      url          = {https://bib-pubdb1.desy.de/record/408350},
}