118 citations
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quant-ph2014★ 16 cited
The Screen representation of spin networks. Images of 6j symbols and semiclassical features
Mirco Ragni, Robert G. Littlejohn, Ana Carla P. Bitencourt +2
This article presents and discusses in detail the results of extensive exact calculations of the most basic ingredients of spin networks, the Racah coefficients (or Wigner 6j symbo…
quant-ph2014★ 20 cited
The Screen representation of spin networks: 2D recurrence, eigenvalue equation for 6j symbols, geometric interpretation and Hamiltonian dynamics
Roger W. Anderson, Vincenzo Aquilanti, Ana Carla P. Bitencourt +2
This paper treats 6j symbols or their orthonormal forms as a function of two variables spanning a square manifold which we call the "screen". We show that this approach gives impor…
quant-ph2002★ 2 cited
Quantum Zeno effect in a multilevel molecule
D. Bruno, P. Facchi, S. Longo +3
We study the dynamics of the populations of a model molecule endowed with two sets of rotational levels of different parity, whose ground levels are energy degenerate and coupled b…