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Quantum optics in static spacetimes: How to sense a cosmic string
Phys. Rev. D 51, 2591 – Published 15 March, 1995
DOI: https://doi.org/10.1103/PhysRevD.51.2591
Abstract
We study the influence of static gravitational fields on the spontaneous emission and the Lamb shift of atoms. To illustrate the procedure we consider a two-level atom coupled by a dipole interaction to a massless scalar quantum field in a general static Riemann space and work out the Einstein coefficient and the radiative energy shift. To treat an example, the general scheme is applied to a cosmic string spacetime. The possibility is discussed to detect, at least in principle, the cosmic string via the modified spontaneous emission.
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