A two-component Bose Einstein condensate can 'bypass' the no-cloning theorem

Abstract

No cloning theorem in quantum cryptography prevents an eavesdropper from perfectly duplicating any arbitrary quantum state. Here we argue that an experimental scheme for producing a two component quantum superposition of Bose Einstein condensates can, in principle, generate N bosonic clones of a single quantum state at large N thermodynamic limit and thus operationally bypass the restrictions imposed by the above mentioned theorem. It is possible because the quantum statistical nature of this cloning operation does not require the unitary evolution of standard quantum mechanics. On the other hand, generation of a two component Bose-Einstein condensate helps in generating the bosonic clones with high fidelity. Such operationally executable perfect quantum cloning machine will significantly impact existing understanding of quantum cryptography and also that of relativity, in general, by allowing superluminal signaling.Comment: 12 pages, 1 figur