Processing of information and computation undergoing a paradigmatic shift
since the realization of the enormous potential of quantum features to perform
these tasks. Coupled cavity array is one of the well-studied systems to carry
out these tasks. It is a versatile platform to build quantum networks for
distributed information processing and communication. Cavities have the salient
feature of retaining photons for longer, thereby enabling them to travel
coherently through the array without losing them in dissipation. Several
research groups have successfully demonstrated the coupling of cavities and
implemented various quantum information protocols. These advancements pave the
way for implementing cavity arrays for large scale quantum communications and
computations. This article reviews theoretical proposals and discusses a few
pertinent experimental realizations of quantum information tasks in cavities.Comment: Suggestions and comments are welcom