  We study a continuous-variable entangled state composed of two states which
are squeezed in two opposite quadratures in phase space. Various entanglement
conditions are tested for the entangled squeezed state and we study decoherence
models for noise, producing a mixed entangled squeezed state. We briefly
describe a probabilistic protocol for entanglement swapping based on the use of
this class of entangled states and the main features of a general generation
scheme.
