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@ARTICLE{Barzel:908043,
      author       = {Barzel, Roy and Bruschi, David Edward and Schell, Andreas
                      W. and Lämmerzahl, Claus},
      title        = {{O}bserver dependence of photon bunching: {T}he influence
                      of the relativistic redshift on {H}ong-{O}u-{M}andel
                      interference},
      journal      = {Physical review / D},
      volume       = {105},
      number       = {10},
      issn         = {2470-0010},
      address      = {Melville, NY},
      publisher    = {Inst.},
      reportid     = {FZJ-2022-02342},
      pages        = {105016},
      year         = {2022},
      abstract     = {We study the influence of the relativistic redshift on
                      Hong-Ou-Mandel (HOM) interference and present a genuine
                      quantum test of general relativity. We use Glauber’s
                      theory of quantum coherence to predict the coincidence
                      probability of realistic broadband photons in HOM
                      experiments in a nonrelativistic setting. We extend the
                      quantum field theoretical framework previously developed to
                      describe the deformation of the spectral profile of single
                      photons in curved spacetimes to a multiphoton framework,
                      which is exact for inertial observers in a flat spacetime
                      and an approximation when observers are located in a curved
                      spacetime. We find that, in case of frequency entangled
                      photons, a mutual redshift between the sender and the
                      receiver can change the coincidence statistics from photon
                      bunching to photon antibunching and vice versa. This implies
                      that the (anti)symmetry of the photonic spectral wave
                      function is an observer dependent notion and that this can
                      be probed via HOM experiments in a relativistic setting.},
      cin          = {PGI-12},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-12-20200716},
      pnm          = {5212 - Emergent Quantum Phenomena (POF4-521)},
      pid          = {G:(DE-HGF)POF4-5212},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000807699000002},
      doi          = {10.1103/PhysRevD.105.105016},
      url          = {https://juser.fz-juelich.de/record/908043},
}