A note on invariants and entanglements
Sergio A Albeverio, Shao-Ming Fei · Journal of Optics B Quantum and Semiclassical Optics · 2001
Quantum entanglements are studied in terms of the invariants under local unitary transformations. A generalized formula of concurrence for N -dimensional quantum systems is presented. This generalized concurrence has potential applications in studying separability and calculating the entanglement of formation for high-dimensional mixed quantum states.