Ensembles of two-level systems interacting with a single-mode electromagnetic field are increasingly being used for the development quantum information processors and mesoscopic devices. These characterized by set energy-level hybridizations, split Lamb shifts, that occur when ensemble mode interact coherently high cooperativity. For dimensions simulating system dynamics while including complet...

We study the Lamb shift of a two-level atom arising from its coupling to conformal massless scalar field, which satisfies Dirichlet boundary conditions, in Hartle-Hawking vacuum BTZ spacetime, and find that spacetime is structurally similar uniformly accelerated near perfectly reflecting (2+1)-dimensional flat spacetime. Our results show suppressed as compared long transition wavelength much la...