scholarly journals Magnetic frustration, short-range correlations and the role of the paramagnetic Fermi surface of PdCrO2

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
David Billington ◽  
David Ernsting ◽  
Thomas E. Millichamp ◽  
Christopher Lester ◽  
Stephen B. Dugdale ◽  
...  
Keyword(s):  
Fermi Surface ◽  
Short Range ◽  
Magnetic Frustration ◽  
Short Range Correlations

scholarly journals A CBF calculation of 1S0 Superfluidity in the Inner Crust of Neutron Stars

2019 ◽  
Vol 17 ◽  
pp. 23
Author(s):  
G. Pavlou ◽  
E. Mavrommatis ◽  
Ch. C. Moustakidis ◽  
J. W. Clark
Keyword(s):  
Equation Of State ◽  
Neutron Stars ◽  
Basis Function ◽  
Correlation Functions ◽  
Short Range ◽  
Higher Order ◽  
Neutron Matter ◽  
S Wave ◽  
Short Range Correlations

Singlet S-wave superfluidity of dilute neutron matter in the inner crust of neutron stars is studied within the correlated BCS (Bardeen, Cooper, Schrieffer) method, taking into account both pairing and short-range correlations. First, the equation of state (EOS) of normal neutron matter is calculated within the correlated-basis-function (CBF) method in lowest cluster order using the Argonne V18 and V4′ potentials and Jastrow-type correlation functions. The 1S0 superfluid gap is then calculated with these potentials and correlation functions. The dependence of our results on the choice of the correlation functions is ana- lyzed and the role of higher-order cluster corrections is considered. The values obtained for the 1S0 gap within this simplified scheme are comparable to those from other, more elaborate, methods.

scholarly journals RECENT OBSERVATION OF SHORT-RANGE NUCLEON CORRELATIONS IN NUCLEI AND THEIR IMPLICATIONS FOR THE STRUCTURE OF NUCLEI AND NEUTRON STARS

2008 ◽  
Vol 23 (20) ◽  
pp. 2991-3055 ◽  
Author(s):  
LEONID FRANKFURT ◽  
MISAK SARGSIAN ◽  
MARK STRIKMAN
Keyword(s):  
Neutron Stars ◽  
Short Range ◽  
Degrees Of Freedom ◽  
Cold Neutron ◽  
Recent Observation ◽  
Experimental Studies ◽  
Heavy Nuclei ◽  
Short Range Correlations ◽  
Fast Removal

Novel processes probing the decay of nucleus after removal of a nucleon with momentum larger than Fermi momentum by hard probes finally proved unambiguously the evidence for long sought presence of short-range correlations (SRC's) in nuclei. In combination with the analysis of large Q2, A(e, e')X processes at x > 1 they allow us to conclude that (i) practically all nucleons with momenta ≥ 300 MeV /c belong to SRC's, consisting mostly of two nucleons, (ii) probability of such SRC's in medium and heavy nuclei is ~25%, (iii) a fast removal of such nucleon practically always leads to emission of correlated nucleon with approximately opposite momentum, (iv) proton removal from two-nucleon SRC's in 90% of cases is accompanied by a removal of a neutron and only in 10% by a removal of another proton. We explain that observed absolute probabilities and the isospin structure of two nucleon SRC's confirm the important role that tensor forces play in internucleon interactions. We also find that the presence of SRC's requires modifications of the Landau Fermi liquid approach to highly asymmetric nuclear matter and leads to a significantly faster cooling of cold neutron stars with neutrino cooling operational even for Np/Nn ≤ 0.1. The effect is even stronger for the hyperon stars. Theoretical challenges raised by the discovered dominance of nucleon degrees of freedom in SRC's and important role of the spontaneously broken chiral symmetry in quantum chromodynamics (QCD) in resolving them are considered. We also outline directions for future theoretical and experimental studies of the physics relevant for SRC's.

Role of short range correlations on nuclear matrix elements of neutrinoless double beta decay

2011 ◽  
Author(s):  
R. Chandra ◽  
K. Chaturvedi ◽  
P. K. Rath ◽  
P. K. Raina ◽  
S. K. Singh ◽  
...  
Keyword(s):  
Beta Decay ◽  
Nuclear Matrix ◽  
Short Range ◽  
Neutrinoless Double Beta Decay ◽  
Double Beta Decay ◽  
Matrix Elements ◽  
Short Range Correlations

The role of short-range correlations in the nuclear photoeffect

1973 ◽  
Vol 8 (1) ◽  
pp. 16-20 ◽  
Author(s):  
A. Małecki ◽  
P. Picchi
Keyword(s):  
Short Range ◽  
Short Range Correlations

scholarly journals Planar triangular S=3/2 magnet AgCrSe2 : Magnetic frustration, short range correlations, and field-tuned anisotropic cycloidal magnetic order

2021 ◽  
Vol 104 (13) ◽  
Author(s):  
M. Baenitz ◽  
M. M. Piva ◽  
S. Luther ◽  
J. Sichelschmidt ◽  
K. M. Ranjith ◽  
...  
Keyword(s):  
Short Range ◽  
Magnetic Order ◽  
Magnetic Frustration ◽  
Short Range Correlations

scholarly journals A systematic study of the effect of short range correlations on the occupation numbers of the shell model orbits in light nuclei

2019 ◽  
Vol 3 ◽  
pp. 48
Author(s):  
G. A. Lalazissis ◽  
S. E. Massen ◽  
C. P. Panos
Keyword(s):  
Shell Model ◽  
Systematic Study ◽  
Ground State ◽  
Short Range ◽  
Light Nuclei ◽  
Occupation Numbers ◽  
Approximate Treatment ◽  
Short Range Correlations

The role of short-range correlations on the depletion of the Fermi sea is studied in light nuclei.The short range correlations are considered in an approximate treatment allowing a systematic study of nuclei in the region 4 < A < 40. The "natural orbital" representation is used for the determination of the occupation probabilities of the shell model orbits of the ground state wave function. The depletion of the nuclear Fermi sea appears to be, on the average, about 32%.

Distribution and Correlation of the Coding Sequence Lengths in Bacterial Genomes

2008 ◽  
Vol 59 (11) ◽  
Author(s):  
Vasile V. Morariu
Keyword(s):  
Correlation Analysis ◽  
Exponential Function ◽  
Short Range ◽  
Statistical Physics ◽  
Bacterial Genomes ◽  
Coding Sequence ◽  
Correlation Properties ◽  
Short Range Correlations ◽  
Fluctuating System

The length of coding sequence (CDS) series in bacterial genomes were regarded as a fluctuating system and characterized by the methods of statistical physics. The distribution and the correlation properties of CDS for 47 genomes were investigated. The distribution was found to be approximated by an exponential function while the correlation analysis revealed short range correlations.

Sign in / Sign up

Export Citation Format

Share Document