Optimal universal disentangling machine for two-qubit quantum states
Sibasish Ghosh, Somshubhro Bandyopadhyay, Anirban Roy, Debasis Sarkar, Guruprasad Kar · Physical Review A · 2000
We derive the optimal curve satisfied by the reduction factors, in the case of a universal disentangling machine that uses only local operations. The impossibility of constructing a better disentangling machine, by using nonlocal operations, is discussed.