scholarly journals Ground state properties of graphene in Hartree-Fock theory

2012 ◽  
Vol 53 (9) ◽  
pp. 095220 ◽  
Author(s):  
Christian Hainzl ◽  
Mathieu Lewin ◽  
Christof Sparber
Keyword(s):  
Ground State ◽  
Hartree Fock ◽  
Ground State Properties

EFFECTS OF CORE POLARIZATION AND PAIRING CORRELATIONS ON SOME GROUND-STATE PROPERTIES OF DEFORMED ODD-MASS NUCLEI WITHIN THE HIGHER TAMM–DANCOFF APPROACH

2011 ◽  
Vol 20 (02) ◽  
pp. 252-258 ◽  
Author(s):  
LUDOVIC BONNEAU ◽  
JULIEN LE BLOAS ◽  
PHILIPPE QUENTIN ◽  
NIKOLAY MINKOV
Keyword(s):  
Ground State ◽  
Mean Field ◽  
Energy Difference ◽  
Pair Type ◽  
Many Body ◽  
Hartree Fock ◽  
Ground State Properties ◽  
Pairing Correlations ◽  
The Many ◽  
The Impact

In self-consistent mean-field approaches, the description of odd-mass nuclei requires to break the time-reversal invariance of the underlying one-body hamiltonian. This induces a polarization of the even-even core to which the odd nucleon is added. To properly describe the pairing correlations (in T = 1 and T = 0 channels) in such nuclei, we implement the particle-number conserving Higher Tamm–Dancoff approximation with a residual δ interaction in each isospin channel by restricting the many-body basis to two-particle–two–hole excitations of pair type (nn, pp and np) on top of the Hartree–Fock solution. We apply this approach to the calculation of two ground-state properties of well-deformed nuclei |Tz| = 1 nuclei around 24 Mg and 48 Cr , namely the isovector odd-even binding-energy difference and the magnetic dipole moment, focusing on the impact of pairing correlations.

GROUND-STATE PROPERTIES OF BILAYER ν=2 QUANTUM HALL STATES

2004 ◽  
Vol 18 (27n29) ◽  
pp. 3713-3716 ◽  
Author(s):  
YUICHI SHIMODA ◽  
TATSUYA NAKAJIMA ◽  
ANJU SAWADA
Keyword(s):  
Ground State ◽  
Energy Region ◽  
Quantum Hall ◽  
Exact Diagonalization ◽  
Excitation Spectra ◽  
Hartree Fock ◽  
Quantum Hall States ◽  
Ground State Properties ◽  
Tunneling Energy ◽  
Hall States

We construct a Hartree-Fock-Bogoliubov (HFB) Hamiltonian Haldane-sphere and study excitation spectra and ground-state properties in bilayer ν=2 QH systems. It is found that the HFB approximation can systematically give SU (2) symmetrical excitation spectra spectra well agree with those from exact diagonalization calculations in large tunneling-energy region. In this region, has been considered to be a pseudospin-squeezed ground state is favored theory.

Exact-exchange Hartree-Fock calculations for periodic systems. III. Ground-state properties of diamond

1980 ◽  
Vol 22 (12) ◽  
pp. 5936-5944 ◽  
Author(s):  
R. Dovesi ◽  
C. Pisani ◽  
F. Ricca ◽  
C. Roetti
Keyword(s):  
Ground State ◽  
Periodic Systems ◽  
Hartree Fock ◽  
Ground State Properties ◽  
Exact Exchange
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