How a Two-Component Bose–Einstein Condensate Can ‘Bypass’ the No-Cloning Theorem?

Abstract

We know that no-cloning theorem in quantum information theory prevents everyone from perfectly replicating any arbitrary quantum state. However, here we propose an experimental scheme to produce N bosonic clones of an arbitrary single quantum state at large N thermodynamic limit using a two-component Bose–Einstein condensate of excitons. Quantum statistical nature of this ‘cloning operation’ does not necessitate strict unitary evolution within a single Hilbert space which is essentially required for the no-cloning theorem. Therefore, this quantum cloning scheme can operationally ‘bypass’ the stringent restrictions imposed by the above mentioned theorem without directly violating it.