A quantum computer can perform exponentially faster than its classical counterpart. It works
on the principle of superposition. But due to the decoherence effect, the superposition of a …

Recoupling coefficients (3 nj symbols) are unitary transformations between binary coupled
eigenstates of N=(n+ 1) mutually commuting SU (2) angular momentum operators. They …

The action of the quantum mechanical volume operator, introduced in connection with a
symmetric representation of the three-body problem and recently recognized to play a …

A great variety of data on molecular structure and changes, accumulated both
experimentally and theoretically, need be compacted and classified to extract the …

The six volumes LNCS 11619-11624 constitute the refereed proceedings of the 19th
International Conference on Computational Science and Its Applications, ICCSA 2019, held …

The Schläfli identity, which is important in Regge calculus and loop quantum gravity, is
examined from a symplectic and semiclassical standpoint in the special case of flat, three …

The observation of hydrogen peroxide in the interstellar medium represents a remarkable
discovery for the astrochemistry community. The prototypical role that this molecule …

This paper treats 6 j 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 …

Increasing interest is being dedicated in the last few years to the issues of exact
computations and asymptotics of spin networks. The large–entries regimes (semiclassical …

The Wigner 9 j symbols of the first kind—also known as Fano X-coefficients—serve to
connect different addition schemes of four angular momenta, widely known examples being …