Zobrazeno 1 - 10
of 1 029
pro vyhledávání: '"Baran, V."'
Autor:
Baran, V. V., Dukelsky, J.
Publikováno v:
Phys. Rev. C 103, 054317 (2021)
The ground state pairing correlations in finite fermionic systems are described with a high degree of accuracy within a variational approach based on a combined coupled-cluster and particle-number-projected BCS ansatz. The flexibility of this symmetr
Externí odkaz:
http://arxiv.org/abs/2102.08233
The formal equivalence between the quartetting picture and the symmetry restored BCS picture is established for the ground state correlations induced by the general isovector-isoscalar pairing interaction. Multiple ground state structures compatible
Externí odkaz:
http://arxiv.org/abs/2009.11588
Publikováno v:
Phys. Rev. C 102, 061301 (2020)
The formal implications of a quartet coherent state ansatz for proton-neutron pairing are analyzed. Its nonlinear annihilation operators, which generalize the BCS linear quasiparticle operators, are computed in the quartetting case. Their structure i
Externí odkaz:
http://arxiv.org/abs/2009.00932
The vibrational structure of the Pygmy Dipole Resonance (PDR) is investigated within a quantum many-body treatment with extended separable interactions able to encode the dependence of nuclear symmetry energy on density. A new picture of PDR is unvei
Externí odkaz:
http://arxiv.org/abs/2006.00638
Autor:
Baran, V. V., Delion, D. S.
Publikováno v:
Physics Letters B 805, 135462 (2020)
We introduce a BCS-like theory for the quartet correlations induced by the isovector pairing interaction. It is based on a coherent state of BCS type and, unlike usual mean field approaches, it displays a vanishing pair anomalous density $\langle c^\
Externí odkaz:
http://arxiv.org/abs/1909.10192
Autor:
Baran, V. V., Delion, D. S.
Publikováno v:
Phys. Rev. C 100, 034326 (2019)
We study the nontrivial interplay of the well known \emph{pairing} and the more complex \emph{quarteting} correlations in the particular case of $N>Z$ atomic nuclei. Within the new Analytical Disentangled Condensate model, by implementing the notion
Externí odkaz:
http://arxiv.org/abs/1905.06639
Autor:
Baran, V. V., Delion, D. S.
Publikováno v:
Phys. Rev. C 99, 064311 (2019)
We study the description of single-species and isovector pairing correlations in the framework of the projected-BCS (PBCS) and the Quartet Condensation Model (QCM) from a particle-hole perspective and we introduce the representation of the QCM quarte
Externí odkaz:
http://arxiv.org/abs/1902.00065
Autor:
Baran, V. V., Delion, D. S.
Publikováno v:
Phys. Rev. C 99, 031303 (2019)
Within the Quartet Condensation Model (QCM), the isovector pairing correlations for $N = Z$ nuclei are described with a very high accuracy by a condensate of $\alpha$-like quartets. The usual approach involves cumbersome recurrence relations in order
Externí odkaz:
http://arxiv.org/abs/1901.04759
Publikováno v:
Phys. Lett. B 769 (2017) 424-429
We study the pre-equilibrium dipole response in the charge-asymmetric reaction $^{132}$Sn+$^{58}$Ni at $E_{lab}=10$ MeV/A, within a semi-classical transport model employing effective interactions for the nuclear mean-field. In particular, we adopt th
Externí odkaz:
http://arxiv.org/abs/1612.06889
We review recent results on intermediate mass cluster production in heavy ion collisions at Fermi energy and in spallation reactions. Our studies are based on modern transport theories, employing effective interactions for the nuclear mean-field and
Externí odkaz:
http://arxiv.org/abs/1604.03866