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.

► Present work connects two important concepts: entanglement and deformation. ► As earlier proven, deformed oscillators do realize composite bosons operator algebra. ► We calculate main characteristics of bipartite entanglement of composite boson states. ► Bipartite entanglement characteristics are generalized to multi-quasiboson states. ► For all the cases, entanglement characteristics depend on deformation parameter only.