Coherent states of nonlinear algebras: applications to quantum optics

We present a general unified approach for finding the coherent stares (CSs) of polynomially deformed algebras such as the quadratic and Higgs algebras, which are: relevant for various multiphoton processes in quantum optics. We give a general procedure: to map these deformed algebras to appropriate Lie algebras. This is used, for the noncompact cases, to obtain the annihilation operator eigenstates, by finding the canonical conjugates of these operators. Generalized CSs, in the Perelomov sense, also follow from this construction. This allows us to explicitly construct CSs associated with various quantum optical systems.