Spectroscopy of discrete energy levels in ultrasmall metallic grains

J Von Delft, DC Ralph - Physics Reports, 2001 - Elsevier
We review recent experimental and theoretical work on ultrasmall metallic grains, ie grains
sufficiently small that the conduction electron energy spectrum becomes discrete. The …

Thermal and quantal fluctuations for fixed particle number in finite superfluid systems

R Rossignoli, N Canosa, P Ring - Physical review letters, 1998 - APS
We investigate fluctuations and even-odd effects in small superfluid systems at finite
temperature by means of the static path approximation (SPA) plus random-phase …

Superconductivity in ultrasmall metallic grains

J von Delft - Annalen der Physik, 2001 - Wiley Online Library
We review recent experimental and theoretical work on superconductivity in ultrasmall
metallic grains, ie grains sufficiently small that the conduction electron energy spectrum …

Clustering in nuclei at finite temperature

E Yüksel, F Mercier, JP Ebran, E Khan - Physical Review C, 2022 - APS
We investigate the localization and clustering features in Ne 20 (N= Z) and neutron-rich Ne
32 nuclei at zero and finite temperatures. The finite temperature Hartree-Bogoliubov theory …

Complex modes in unstable quadratic bosonic forms

R Rossignoli, AM Kowalski - Physical Review A—Atomic, Molecular, and …, 2005 - APS
We discuss the necessity of using nonstandard boson operators for diagonalizing quadratic
bosonic forms which are not positive definite and its convenience for describing the temporal …

A self-consistent treatment of damped motion for stable and unstable collective modes

H Hofmann, D Kiderlen - International Journal of Modern Physics E, 1998 - World Scientific
We address the dynamics of damped collective modes in terms of first and second moments.
The modes are introduced in a self-consistent fashion with the help of a suitable application …

The perturbed static path approximation at finite temperature: observables and strength functions

H Attias, Y Alhassid - Nuclear physics A, 1997 - Elsevier
We present an approximation scheme for calculating observables and strength functions of
finite fermionic systems at finite temperature such as hot nuclei. The approach is formulated …

Fermionic entanglement in the Lipkin model

M Di Tullio, R Rossignoli, M Cerezo, N Gigena - Physical Review A, 2019 - APS
We examine the fermionic entanglement in the ground state of the fermionic Lipkin model
and its relation with bipartite entanglement. It is first shown that the one-body entanglement …

Thermodynamics of ultrasmall metallic grains in the presence of pairing and exchange correlations: Mesoscopic fluctuations

KN Nesterov, Y Alhassid - Physical Review B—Condensed Matter and …, 2013 - APS
We study the mesoscopic fluctuations of thermodynamic observables in a nanosized
metallic grain in which the single-particle dynamics are chaotic and the dimensionless …

Thermodynamical properties of small superconductors with a fixed number of particles

D Gambacurta, D Lacroix - Physical Review C—Nuclear Physics, 2012 - APS
The variation after projection approach is applied for the first time to the Richardson pairing
Hamiltonian to describe the thermodynamics of small superconductors with a fixed number …