Conveners
Novel aspects and signatures of QPTs in nuclei
- Lorenzo Fortunato
- Andrea Vitturi
Novel aspects and signatures of QPTs in nuclei
- Andrea Vitturi
- Lorenzo Fortunato
The pairing interaction induces particle-particle correlations that are essential in defining the properties of finite quantum many body systems in their ground and neighbouring states. The two-nucleon transfer reactions turned to be a very specific probe of this pairing.
The experimental transfer probabilities for one- and two-neutron transfer channels as a function of the distance of...
Two-neutron transfer reactions are sensitive to Quantum shape phase transitions along isotopic chains through two-neutron intensities, as calculated for example in the framework of the Interacting Boson Model [1-3]. Alternatively, the ground state of an isotope can also change along the isotopic chain, for example from spherical to deformed, due to shape coexistence.
In this contribution...
The consequences of the attractive, short-range nucleon-nucleon (NN) interaction on the wave functions of the Elliott SU(3) and the proxy-SU(3) symmetry [1,2,3] are discussed. The NN interaction favors the most symmetric spatial SU(3) irreducible representation, which corresponds to the maximal spatial overlap among the fermions. The percentage of the symmetric components out of the total in...
One of the main unanswered questions of modern nuclear physics is whether the traditional magic numbers of protons and neutrons, such as they are known near stability, are maintained at extreme values of isospin, or whether new magic numbers emerge as a result of the unbalanced neutron-to-proton ratios.
The nuclear region around $^{78}$Ni, with 28 protons and 50 neutrons, has attracted great...
Quantum computers show great promise, but as yet are still limited to toy problems. Here I discuss the quantum computation of that classic toy model of nuclear structure, the Lipkin model, and what we can learn about the near and far future of quantum computing.
Quantum simulations provide a fast-developing and powerful tool to realize the analysis of various physical systems of quantum nature and should be able to outperform classical computers and solve previously intractable problems. As such, many experimental setups are being proposed to validate the feasibility of the quantum simulation of different physical models. In this work, we study an...
Artificial intelligence, which has become widespread in all fields of science and technology in recent years, has taken its place as an alternative method in the field of nuclear physics. Machines, which are subjected to learning with the use of existing data, can make predictions on what they have learned, and can complete the future data or the deficiencies in the data set it belongs to....
The variation of spectral characteristics of the wobbling and chiral partner bands and the associated dynamics inferred by non-axial quasiparticle alignments with arbitrary tilting [1] is investigated within a semiclassical approach to the particle-rotor Hamiltonian [2,3]. The results for the alignment of the valence h11/2 nucleons are investigated as a function of total angular momentum and...
A new microscopic interpretation of the s and d bosons of the Interacting Boson Model shall be suggested. The s and d bosons will be symmetric pairs of harmonic oscillator quanta deriving from the occupancy of the valence Shell Model orbitals by the valence nucleons. It will be discussed that if such is the case, then the SU(3) limit of the Interacting Boson Model coincides the Elliott SU(3) symmetry.
One of the fingerprints for nuclear triaxiality, i.e., wobbling motion, present in $^{163}$Lu is described within a semi-classical formalism that introduces the concepts of Signature Partner Bands and Parity Partner Bands, which are amended to a Particle-Rotor Model. These two ideas help re-defining the band structure of this isotope in such a way that the experimental wobbling spectrum can be...
I will illustrate an exactly solvable algebraic Hamiltonian for odd systems, that spans the prolate-to-oblate region. The underlying $\ SU^{BF}(3) \otimes U^{F}_s(2) $ dynamical symmetry, allows to maintain the axial symmetry throughout, thanks to the mixing of quadratic and cubic Casimir operators of $SU^{BF}(3)$. A fermionic basis with j = {1/2, 3/2, 5/2} is coupled to the boson part and...
