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quant-ph2008★ 5 cited
Comparative study of semiclassical approaches to quantum dynamics
G. Schubert, V. S. Filinov, K. Matyash +2
Quantum states can be described equivalently by density matrices, Wigner functions or quantum tomograms. We analyze the accuracy and performance of three related semiclassical appr…
quant-ph2003
Entanglement and correlation in anisotropic quantum spin systems
Ulrich Glaser, Helmut Büttner, Holger Fehske
Analytical expressions for the entanglement measures concurrence, i-concurrence and 3-tangle in terms of spin correlation functions are derived using general symmetries of the quan…