Results 301 to 310 of about 4,316,417 (322)

Antiferromagnetic ground state

Journal of Physics and Chemistry of Solids, 1959
Abstract The ground-state wave function for an antiferromagnetic spin array, corresponding to the Hamiltonian H = Jσ (neighbors) Si. Sj, has been approximated by a simple linear combination of those basis vectors that can be derived from the idealized Neel ground state by transferring a few spin deviations between neighboring spins.
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UNIQUENESS OF GROUND STATE SOLUTIONS

Acta Mathematica Scientia, 1988
Summary: We discuss the uniqueness of ground state solutions of the problem \[ \Delta u+f(u)=0\quad in\quad R^ n;\quad u(x)\to 0\quad as\quad | x| \to \infty, \] where \(N>2\), f(u) satisfies some conditions which ensure the existence of a ground state solution.
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Ground-State Correlation

2013
So far we have discussed mainly the spectroscopic properties. The model is however applied to the analysis of ground-state properties, such as binding energies and two-nucleon separation energies. By the diagonalization of the IBM Hamiltonian determined microscopically, the quantum-mechanical correlation energy, which is missing in the mean-field ...
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Antiferromagnetic ground state

Journal of Physics and Chemistry of Solids, 1963
Abstract The calculations of the energy of the antiferromagnetic ground state by Fisher are corrected. The revised results are in good agreement with other theories for spin 1 2 . The apparent contradictions as to the average z component of spin on one sublattice, and the perpendicular susceptibility in several theories are clearly resolved.
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Dileptonic-helium ground-state energy

Physical Review A, 1988
The large-dimensional approach to atomic physics is extended to accommodate mass-polarization and recoil contributions. This approach, which does not rely on partitioning of the potential into subterms, but instead treats the Hamiltonian for large dimension exactly and incorporates corrections order by order in the dimension, is of interest for exotic ...
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Ground-State Properties

1984
The ability to calculate properties such as lattice parameter, compressibility, cohesive energy, and magnetic moment for crystalline solids in their ground state represents an important step towards the understanding of the behaviour of a variety of materials.
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Ground state of amorphous iron

Physical Review B, 1989
On the basis of a new theory of finite-temperature magnetism in amorphous materials and liquids, it is shown that amorphous iron forms an itinerant-electron spin glass at low temperatures because of the nonlinear magnetic couplings between iron local moments and local-environment effects on the amplitude of the local moments.
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Ground State of Liquid Helium

Physical Review, 1959
S>A calculation scheme suitable for studying the ground state of many- body Bose quantum systems with strong forces is developed. The calculation scheme is basel on the nodeless property of ihe ground-state wave function and is capable of yielding in some cases upper and lower bounds on the ground-state energy and corresponding wave functions.
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Stochastic ground-state processes

Physical Review B, 1994
, Eleutério, , Vilela Mendes R
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Ground State

2004
Oleg M. Braun, Yuri S. Kivshar
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