Role of domain walls in the ground-state properties of the spin-1/2XXZHamiltonian in the linear chain

1990 ◽  
Vol 41 (10) ◽  
pp. 6788-6793 ◽  
Author(s):  
G. Gómez-Santos
Keyword(s):  
Ground State ◽  
Domain Walls ◽  
Linear Chain ◽  
Ground State Properties

DINEUTRON CORRELATION IN THE GROUND STATE AND E1 EXCITATIONS OF BORROMEAN NUCLEI

2010 ◽  
Vol 25 (21n23) ◽  
pp. 1842-1845
Author(s):  
K. HAGINO ◽  
H. SAGAWA ◽  
T. OISHI
Keyword(s):  
Contact Interaction ◽  
Ground State ◽  
Energy Distributions ◽  
Weakly Bound ◽  
Density Dependent ◽  
Body Model ◽  
Dipole Excitation ◽  
Ground State Properties ◽  
Three Body

Using a three-body model with density-dependent contact interaction, we discuss the role of dineutron correlation in the ground state properties as well as in the dipole excitation of typical weakly-bound Borromean nuclei, 11 Li and 6 He . We show that, while both the nuclei manifest themselves similar strong dineutron correlations to each other in the ground state, the energy distributions for the two emitted neutrons from the dipole excitation are considerably different. We also discuss briefly the diproton correlation in a proton-rich Borromean nucleus, 17 Ne .

scholarly journals Ground-state properties of trapped Bose-Fermi mixtures: Role of exchange correlation

2003 ◽  
Vol 67 (6) ◽  
Author(s):  
Alexander P. Albus ◽  
Fabrizio Illuminati ◽  
Martin Wilkens
Keyword(s):  
Ground State ◽  
Exchange Correlation ◽  
Ground State Properties

scholarly journals AB INITIO TREATMENTS OF THE ISING MODEL IN A TRANSVERSE FIELD

2000 ◽  
Vol 14 (15) ◽  
pp. 1517-1536
Author(s):  
R. F. BISHOP ◽  
D. J. J. FARNELL ◽  
M. L. RISTIG
Keyword(s):  
Ising Model ◽  
Ground State ◽  
Quantum Monte Carlo ◽  
Linear Chain ◽  
Transverse Field ◽  
Spatial Dimension ◽  
Cluster Method ◽  
Ground State Properties ◽  
Quantum Monte Carlo Method ◽  
Exact Calculations

In this article new results are presented for the zero-temperature ground-state properties of the spin-half transverse Ising model on various lattices using three different approximate techniques. These are, respectively, the coupled cluster method, the correlated basis function method, and the variational quantum Monte Carlo method. The methods, at different levels of approximation, are used to study the ground-state properties of these systems, and the results are found to be in excellent agreement both with each other and with results of exact calculations for the linear chain and results of exact cumulant series expansions for lattices of higher spatial dimension. The different techniques used are compared and contrasted in the light of these results, and the constructions of the approximate ground- state wave functions are especially discussed.

scholarly journals QUARKS AND NEUTRON HALO NUCLEI, NUCLEAR CLUSTERS AND NUCLEAR MOLECULES

2001 ◽  
Vol 16 (12) ◽  
pp. 755-761 ◽  
Author(s):  
AFSAR ABBAS
Keyword(s):  
Ground State ◽  
Halo Nuclei ◽  
Neutron Halo ◽  
Comprehensive Understanding ◽  
Properties Of Nuclei ◽  
Ground State Properties ◽  
Nuclear Molecules ◽  
Nuclear Clusters ◽  
Nuclear Effects

It is shown that the hole in the centre of 3 H , 3 He and 4 He , the neutron halos in nuclei, the α- and other clustering effects in nuclei and the nuclear molecules all basically arise due to the same underlying effect. We shall show that all these ground state properties of nuclei are manifestations of quark effects. The role of triton clustering in very neutron rich nuclei is emphasized. All these require the concept of hidden colour states which arise from confinement ideas of QCD for the multi-quark systems. This provides a comprehensive understanding of diverse nuclear effects and makes unique predictions.

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