10 citations · 18 across the 3 of their papers we have counts for
7 papers
-like quartetting in the excited states of proton-neutron pairing Hamiltonians
M. Sambataro, N. Sandulescu
Previous studies have shown that the ground state of systems of nucleons composed by an equal number of protons and neutrons interacting via proton-neutron pairing forces can be de…
Quartet condensation induced by the isovector pairing force
M. Sambataro, N. Sandulescu
The phenomenon of quartet condensation in the ground state of an isovector pairing Hamiltonian for an even-even system is investigated. For this purpose we follow the evoluti…
Exact T=0 Eigenstates of the Isovector Pairing Hamiltonian
M. Sambataro, N. Sandulescu
We derive the exact seniority-zero eigenstates of the isovector pairing Hamiltonian for an even number of protons and neutrons. Nucleons are supposed to be distributed over a…
Pairing correlations and eigenvalues of two-body density matrix in atomic nuclei
Michelangelo Sambataro, Nicolae Sandulescu
The quantum phases of superconductivity and superfluidity are characterised mathematically by the Yang concept of Off-Diagonal Long Range Order (ODLRO), related to the existence of…
Quartet structure of nuclei in a boson formalism: the case of Si
M. Sambataro, N. Sandulescu
The structure of the nucleus Si is studied by resorting to an IBM-type formalism with and bosons representing isospin and angular momentum and $J=2…
Quarteting and spin-aligned proton-neutron pairs in heavy N=Z nuclei
M. Sambataro, N. Sandulescu
We analyze the role of maximally aligned isoscalar pairs in heavy nuclei by employing a formalism of quartets. Quartets are superpositions of two neutrons and two protons cou…