67 citations · 73 across the 2 of their papers we have counts for
2 papers
quant-ph2003★ 67 cited
Orbits of quantum states and geometry of Bloch vectors for -level systems
S. G. Schirmer, T. Zhang, J. V. Leahy
Physical constraints such as positivity endow the set of quantum states with a rich geometry if the system dimension is greater than two. To shed some light on the complicated stru…
math.DG2002★ 6 cited
The spectral geometry of the Riemann curvature tensor
P. Gilkey, R. Ivanova, T. Zhang
Let E be a natural operator associated to the curvature tensor of a pseudo-Riemannian manifold. This survey article studies when the spectrum, or more generally the real Jordan nor…