Entanglement in composite bosons realized by deformed oscillators

Composite bosons (or quasibosons), as recently proven, are realizable by deformed oscillators and due to that can be effectively treated as particles of non-standard statistics (deformed bosons). This enables us to study quasiboson states and their inter-component entanglement aspects using the well-developed formalism of deformed oscillators. We prove that the internal entanglement characteristics for single two-component quasiboson are determined completely by the parameter(s) of deformation. The bipartite entanglement characteristics are generalized and calculated for arbitrary multi-quasiboson (Fock, coherent, etc.) states and expressed through deformation parameter. (c) 2012 Elsevier B.V. All rights reserved.