On the equivalence of separability and extendability of quantum states

B. V. Rajarama Bhat, K. R. Parthasarathy, Ritabrata Sengupta

Motivated by the notions of $k$-extendability and complete extendability of the state of a finite level quantum system as described by Doherty et al (Phys. Rev. A, 69:022308), we i…