Boundarylike behaviors of the resonance interatomic energy in a cosmic string spacetime. (arXiv:1802.01699v1 [gr-qc])

By generalizing the formalism proposed by Dalibard, Dupont-Roc and Cohen
Tannoudji, we study the resonance interatomic energy of two identical atoms
coupled to quantum massless scalar fields in a symmetric /antisymmetric
entangled state in the Minkowski and cosmic string spacetimes. We find that in
both spacetimes, the resonance interatomic energy has nothing to do with the
field fluctuations but is attributed to the radiation reaction of the atoms
only. We then concretely calculate the resonance interatomic energy of two
static atoms near a perfectly reflecting boundary in the Minkowski spacetime
and near an infinite and straight cosmic string respectively. We show that the
resonance interatomic energy in both cases can be enhanced or suppressed and
even nullified as compared with that in an unbounded Minkowski spacetime,
because of the presence of the boundary in the Minkowski spacetime or the
nontrivial spacetime topological structure of the cosmic string. Besides, we
also discover that the resonance interatomic energy in the cosmic string
spacetime exhibits some peculiar properties, making it in principle possible to
sense different cosmic string spacetimes via the resonance interatomic energy.

Article web page: