We consider an array of coupled cavitieswith staggered intercavity couplings,where each cavity mode interactswith an atom. In contrast to large-size arrays with uniform hopping rates where the atomic dynamics is knownto be frozen in the strong-hopping regime, we show that resonant atom-field dynamics with significant energyexchange can occur in the case of staggered hopping rates even in the thermodynamic limit. This effect arisesfrom the joint emergence of an energy gap in the free photonic dispersion relation and a discrete frequency atthe gap’s center. The latter corresponds to a bound normal mode stemming solely from the finiteness of the arraylength. Depending on which cavity is excited, either the atomic dynamics is frozen or a Jaynes-Cummings-likeenergy exchange is triggered between the bound photonic mode and its atomic analog. As these phenomena areeffective with any number of cavities, they are prone to be experimentally observed even in small-size arrays.
|Numero di pagine||12|
|Rivista||PHYSICAL REVIEW A|
|Stato di pubblicazione||Published - 2011|
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics