Direct measurement of nonlinear properties of bipartite quantum states

• Published in: Physical review letters Vol. 95; no. 24; p. 240407
• Main Authors: Bovino, Fabio Antonio, Castagnoli, Giuseppe, Ekert, Artur, Horodecki, Paweł, Alves, Carolina Moura, Sergienko, Alexander Vladimir
• Format: Journal Article
• Language: English
• Published: United States 09.12.2005

Nonlinear properties of quantum states, such as entropy or entanglement, quantify important physical resources and are frequently used in quantum-information science. They are usually calculated from a full description of a quantum state, even though they depend only on a small number of parameters...