PairDiagSph: Generalization of the exact pairing diagonalization program for spherical systems

We present an efficient program for the exact diagonalization solution of pairing Hamiltonian in spherical systems with rotational invariance based on SU(2) quasi-spin algebra. The basis vectors symmetry considered are generated by using iterative algorithm. Then matrix constructed this is diagonalized Lanczos All non-zero elements evaluated “on fly” scattering operator and hash search acting vectors. OpenMP parallel thus developed, PairDiagSph, can efficiently calculate ground-state eigenvalue eigenvector general Hamiltonians. Systems dimension up to 108 be calculated few hours standard desktop computers. Program Title: PairDiagSph. CPC Library link files: https://doi.org/10.17632/t5txsg3s5g.1 Code Ocean capsule: https://codeocean.com/capsule/9159628 Licensing provisions: CC NC 3.0. Programming language: Fortran 95. Nature problem: achieved space. Solution method: generates via adjacency excitation algorithm, diagonalizes + QR Additional comments including restrictions unusual features: total number must less than 64; maximal that handled restricted local RAM capacity.