Direct Measurement of Nonlinear Properties of Bipartite Quantum States
Direct Measurement of Nonlinear Properties of Bipartite Quantum States
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 that specify the state. Here we …