نتایج جستجو برای: ground properties
تعداد نتایج: 997816 فیلتر نتایج به سال:
We give a quantitative account of the ground-state properties of the dilute magnetically trapped 87Rb gas recently cooled and Bose-Einstein condensed at nanokelvin-scale temperatures. Using simple scaling arguments, we show that at large particle number the kinetic energy is a small perturbation, and find a spatial structure of the cloud of atoms and its momentum distribution dependent in an es...
We theoretically investigate the ground state properties of ferromagnetic metal/conjugated polymer interfaces. The work is partially motivated by recent experiments in which injection of spin polarized electrons from ferro-magnetic contacts into thin films of conjugated polymers was reported. We use a one-dimensional nondegenerate Su-Schrieffer-Heeger (SSH) Hamiltonian to describe the conjugate...
The volume and surface effects in the nuclear local energy density and the volume and surface components of the pairing interaction are discussed in the context of the mean-field, Hartree-FockBogoliubov description of atomic nuclei. Predictions of properties of exotic nuclei close to the particle drip lines are presented. PACS. 21.60.Jz Hartree-Fock and random-phase approximations – 21.10.Dr Bi...
The ground state properties of incommensurate films of domain wall structure formed on the (100) plane of face centered cubic crystals are studied by Monte Carlo simulation. The wall energies, wall structure and the wall-wall interaction are determined for domain walls occurring in films which form the c(2×2) registered structure. The systems characterized by different strength and corrugation ...
Bose–Fermi mixtures in one dimension are studied in detail on the basis of an exact solution. Corresponding to three possible choices of the reference state in the quantum inverse scattering method, three sets of Bethe-ansatz equations are derived explicitly. The features of the ground state and low-lying excitations are investigated. The ground state phase diagram caused by the external field ...
We consider a classical lattice gas that consists of more than one “species” of particles (like a spin-32 Ising model or the atomic limit of the extended Hubbard model), whose ground-state phase diagram is macroscopically degenerate. This gas is coupled component-wise and in the Falicov–Kimball-like manner to a multicomponent free-fermion gas. We show rigorously that a component-wise coupling o...
Yu. Aksyutina1,2, H.T. Johansson2, T. Aumann1, K. Boretzky1, M.J.G. Borge3, A. Chatillon1, L.V. Chulkov1,4, D. Cortina-Gil5, U. Datta Pramanik6, H. Emling1, C. Forssén1, H.O.U. Fynbo7, H. Geissel1, G. Ickert1, B. Jonson2, R. Kulessa8, C. Langer1,9, M. Lantz2, T. Le Bleis1,9, K. Mahata1, G. Münzenberg1, T. Nilsson2, G. Nyman2, S. Paschalis10, W. Prokopowicz1, R. Reifarth1,9, A. Richter11, K. Rii...
J. Sirker, ∗ A. Klümper, † and K. Hamacher ‡ Theoretische Physik I, Universität Dortmund, Otto-Hahn-Str. 4, D-44221 Dortmund, Germany (Dated: February 1, 2008) The purpose of this paper is to investigate the ground-state properties of two-dimensional Heisenberg models on a square lattice with a given dimerization. Our aim is threefold: First, we want to investigate the dimensional transition fr...
Exact ground states are calculated with an integer optimization algorithm for twoand three-dimensional site-diluted Ising antiferromagnets in a field ~DAFF! and random field Ising ferromagnets ~RFIM!, the latter with Gaussianand bimodal-distributed random fields. We investigate the structure and the size distribution of the domains of the ground state and compare it to earlier results from Mont...
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