caa a22 4500 445858842 CHVBK 20180317145436.0 cr unu---uuuuu 170323e20110901xx s 000 0 eng 10.1007/s10946-011-9239-6 doi (NATIONALLICENCE)springer-10.1007/s10946-011-9239-6 SU (2) invariants of symmetric qubit states [Elektronische Daten] [Swarnamala Sirsi, Veena Adiga] We express the density matrix for the N-qubit symmetric state or spin-j state (j = N/2) in terms of the well-known Fano statistical tensor parameters. Employing the multi-axial representation, where the spin-j density matrix is shown to be characterized by j(2j + 1) axes and 2j real scalars, we enumerate the number of invariants constructed out of these axes and scalars. We calculate these invariants explicitly in the particular case of the pure and mixed spin-1 state. Springer Science+Business Media, Inc., 2011 SU (2) invariants nationallicence symmetric state nationallicence density matrix nationallicence quantum entanglement nationallicence Sirsi Swarnamala Department of Physics, Yuvaraja's College, University of Mysore, Mysore-05, India aut Adiga Veena Department of Physics, Yuvaraja's College, University of Mysore, Mysore-05, India aut Journal of Russian Laser Research Springer US; http://www.springer-ny.com 32/5(2011-09-01), 495-501 1071-2836 32:5<495 2011 32 10946 https://doi.org/10.1007/s10946-011-9239-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10946-011-9239-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sirsi Swarnamala Department of Physics, Yuvaraja's College, University of Mysore, Mysore-05, India aut NATIONALLICENCE 700 1- Adiga Veena Department of Physics, Yuvaraja's College, University of Mysore, Mysore-05, India aut NATIONALLICENCE 773 0- Journal of Russian Laser Research Springer US; http://www.springer-ny.com 32/5(2011-09-01), 495-501 1071-2836 32:5<495 2011 32 10946 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer