On the renormalization of the energies of the one-particle excitations in a superfluid fermi system

1965 ◽  
Vol 19 (1-4) ◽  
pp. 121-121 ◽  
Author(s):  
N. Menyhárd
Keyword(s):  
Fermi System ◽  
The One ◽  
Superfluid Fermi

On the renormalization of the one-particle energies in a superfluid fermi system

1965 ◽  
Vol 37 (3) ◽  
pp. 831-841
Author(s):  
N. Menyhárd
Keyword(s):  
Fermi System ◽  
The One ◽  
Superfluid Fermi

Stability of phonon branch of the Bose spectrum of a superfluid Fermi system for large momenta

1985 ◽  
Vol 30 (4) ◽  
pp. 2316-2319
Author(s):  
V. A. Podolski ◽  
V. N. Popov
Keyword(s):  
Fermi System ◽  
Phonon Branch ◽  
Superfluid Fermi

scholarly journals Impact of speckle disorder on a superfluid Fermi system

2019 ◽  
Vol 100 (4) ◽  
Author(s):  
Abhishek Joshi ◽  
Pinaki Majumdar
Keyword(s):  
Fermi System ◽  
Superfluid Fermi

scholarly journals Thin Film of a Superfluid Fermi System in a Magnetic Field

1991 ◽  
Vol 80 (1) ◽  
pp. 47-60
Author(s):  
G. Harań ◽  
L.S. Borkowski
Keyword(s):  
Magnetic Field ◽  
Thin Film ◽  
Fermi System ◽  
Superfluid Fermi

LIMITING ANHARMONICITY OF SOFT NUCLEI

1993 ◽  
Vol 02 (02) ◽  
pp. 273-284 ◽  
Author(s):  
V.G. ZELEVINSKY
Keyword(s):  
Phase Transition ◽  
Phenomenological Model ◽  
Large Amplitude ◽  
Collective Motion ◽  
Dynamical Symmetry ◽  
Fermi System ◽  
Leading Role ◽  
Quartic Anharmonicity ◽  
Superfluid Fermi

Soft transitional nuclei are considered in a model of a finite superfluid Fermi system in the vicinity of a phase transition. Microscopic estimates are given for the limiting strength of anharmonicity in such a system. The estimates are based on collectivity, adiabaticity and quadrupole symmetry of large amplitude collective motion. The results imply the leading role of quartic anharmonicity and the O(5) dynamical symmetry of low-lying spectra. It justifies the phenomenological model suggested earlier which turned out to be quite successful in description of data.

SUPERFLUID STATES OF NUCLEAR MATTER BEYOND THE BCS APPROXIMATION

2005 ◽  
Vol 14 (04) ◽  
pp. 513-554 ◽  
Author(s):  
UMBERTO LOMBARDO ◽  
CAIWAN SHEN ◽  
HANS-JOSEF SCHULZE ◽  
WEI ZUO
Keyword(s):  
Neutron Stars ◽  
Fermi System ◽  
Einstein Condensate ◽  
Vertex Correction ◽  
Proton Proton ◽  
Bose Einstein Condensate ◽  
Dispersion Effects ◽  
Proton Pairing ◽  
Bose Einstein ◽  
Superfluid Fermi

The recent progress in the pairing problem and the superfluidity of neutron stars is reviewed. The theory of superfluidity in nuclear and neutron matter is developed beyond the BCS approximation. In particular, the dispersion effects including the depletion of the Fermi surface and the core polarization are discussed within the Brueckner theory. In addition, the effects of vertex correction to the pairing interaction, based on RPA, are incorporated in the generalized gap equation. The isospin singlet (neutron–proton) pairing is investigated in connection with the low-density crossover from a superfluid Fermi system to a Bose–Einstein condensate and the isospin suppression of pairing in neutron-rich matter. The onset of different superfluid states of neutron–neutron and proton–proton pairing in neutron stars is discussed in the context of application to rotational motion and cooling process.

scholarly journals Self-localization of a small number of Bose particles in a superfluid Fermi system

2010 ◽  
Vol 82 (3) ◽  
Author(s):  
Katarzyna Targońska ◽  
Krzysztof Sacha
Keyword(s):  
Fermi System ◽  
Superfluid Fermi

Note on Selection of Coordinate Systems for Geodynamics

1975 ◽  
Vol 26 ◽  
pp. 395-407
Author(s):  
S. Henriksen
Keyword(s):  
Sea Level ◽  
The Other ◽  
Coordinate Systems ◽  
Mean Sea Level ◽  
The Earth ◽  
The One ◽  
Static Systems ◽  
Selection Of

The first question to be answered, in seeking coordinate systems for geodynamics, is: what is geodynamics? The answer is, of course, that geodynamics is that part of geophysics which is concerned with movements of the Earth, as opposed to geostatics which is the physics of the stationary Earth. But as far as we know, there is no stationary Earth – epur sic monere. So geodynamics is actually coextensive with geophysics, and coordinate systems suitable for the one should be suitable for the other. At the present time, there are not many coordinate systems, if any, that can be identified with a static Earth. Certainly the only coordinate of aeronomic (atmospheric) interest is the height, and this is usually either as geodynamic height or as pressure. In oceanology, the most important coordinate is depth, and this, like heights in the atmosphere, is expressed as metric depth from mean sea level, as geodynamic depth, or as pressure. Only for the earth do we find “static” systems in use, ana even here there is real question as to whether the systems are dynamic or static. So it would seem that our answer to the question, of what kind, of coordinate systems are we seeking, must be that we are looking for the same systems as are used in geophysics, and these systems are dynamic in nature already – that is, their definition involvestime.

Nucleation of Disorder in Fe3Al Alloys

1967 ◽  
Vol 25 ◽  
pp. 312-313
Author(s):  
P. R. Swann ◽  
W. R. Duff ◽  
R. M. Fisher
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Annealing Temperature ◽  
Antiphase Domain ◽  
Effect Of Temperature ◽  
Domain Structures ◽  
Transmission Electron ◽  
Domain Boundaries ◽  
Higher Temperature ◽  
The One

Recently we have investigated the phase equilibria and antiphase domain structures of Fe-Al alloys containing from 18 to 50 at.% Al by transmission electron microscopy and Mössbauer techniques. This study has revealed that none of the published phase diagrams are correct, although the one proposed by Rimlinger agrees most closely with our results to be published separately. In this paper observations by transmission electron microscopy relating to the nucleation of disorder in Fe-24% Al will be described. Figure 1 shows the structure after heating this alloy to 776.6°C and quenching. The white areas are B2 micro-domains corresponding to regions of disorder which form at the annealing temperature and re-order during the quench. By examining specimens heated in a temperature gradient of 2°C/cm it is possible to determine the effect of temperature on the disordering reaction very precisely. It was found that disorder begins at existing antiphase domain boundaries but that at a slightly higher temperature (1°C) it also occurs by homogeneous nucleation within the domains. A small (∼ .01°C) further increase in temperature caused these micro-domains to completely fill the specimen.

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