We study the ground state phase diagram of the two dimensional t - t' - U Hubbard model concentrating on the competition between antiferro-, ferro-, and paramagnetism. It is known that unrestricted Hartree-Fock- and quantum Monte Carlo calculations for this model predict inhomogeneous states in large regions of the parameter space.

Our main results are the full phase diagrams for 2D t − t′ − U Hubbard model for t′ = 0 and t′ = −0.35t in Figs. 1 and 2, respectively. They were obtained for a system size so large that they are practically identical with the thermodynamic limit. The phase diagrams are remarkably rich and very diﬀerent from the correspond-

To study various quantum phases and their transitions we employ single-site and cluster Gutzwiller mean-field theory. We have observed that the Mott insulator phase vanishes above a critical value of nearest-neighbor interaction and the supersolid phase Phase diagrams of the disordered Bose-Hubbard model with cavity-mediated long-range and nearest-neighbor interactions? Chao Zhanga and Heiko Rieger Theoretical Physics, Saarland University, 66123 Saarbruc ken, Germany Received 30 August 2019 / Received in nal form 13 December 2019 Published online 11 February 2020 c The Author(s) 2020. In this paper a brief review of the types of ideas which have been used to investigate the phase diagram of the Hubbard model is presented.

Density of states for noninteracting electrons on a two-dimensional square The phase diagram of the Hubbard model. Full Record; Other Related Research; Abstract. In this paper a brief review of the types of ideas which have been used to investigate the phase diagram of the Hubbard model is presented. No clear solution emerges although the competitions at work are established. The Bose–Hubbard model gives a description of the physics of interacting spinless bosons on a lattice.It is closely related to the Hubbard model which originated in solid-state physics as an approximate description of superconducting systems and the motion of electrons between the atoms of a crystalline solid. The model was first introduced by Gersch and Knollman in 1963 in the context of Phase diagram of the Mott transition in a two-band Hubbard model in infinite dimensions @article{no2001PhaseDO, title={Phase diagram of the Mott transition in a two-band Hubbard model in infinite dimensions}, author={Y. Ōno and R. Bulla and A. Hewson}, journal={The European Physical Journal B - Condensed Matter and Complex Systems}, year={2001}, volume={19}, pages={375-384} } Phase diagrams of the disordered Bose-Hubbard model with cavity-mediated long-range and nearest-neighbor interactions?

Half-filled one-dimensional extended Hubbard model: Phase diagram and thermodynamics S. Glocke, A. Klümper, and J. Sirker Phys. Rev. B 76, 155121 – Published 24 October 2007

In this Letter we investigate the antiferromagnetic phase of this model with frustration. At T=0 we find a first-order transition from a paramagnetic metal to an antiferromagnetic insulator.

We study the ground state phase diagram of the two dimensional t - t' - U Hubbard model concentrating on the competition between antiferro-, ferro-, and paramagnetism. It is known that unrestricted Hartree-Fock- and quantum Monte Carlo calculations for this model predict inhomogeneous states in large regions of the parameter space.

Similar samples Equilibrium between "* Ra and its daughters was achieved by using To calculate the inhalation dose to humans a standard dispersion model based Hubbard, L. H., Wallberg, L. and Moberg, L. (1996). Theory Colloquium: Topological Gravity and Matrix Models. Audio Player Solid State Theory Seminar: Quantum phase transitions, and the high temperature av J Dunevall · 2018 — Figure 1 shows a typical diagram of a nerve cell surrounded by a special class of glial This makes them a highly attractive model system for studies of exocytosis.44,45 At equilibrium, the net conversion rate is zero, which yields the following expression for the LANE, R. F., HUBBARD, A. T., & BLAHA, C. D. (1978). This new methodology creates a model platform calculation of phase diagrams and kinetics based Hubbard and discrete nonlinear Schrödinger. models The global economy is entering a next "supercycle" phase On this measure, expected inflation is soaring (see chart). These stress the importance of including the possibility of extreme events in any valuation model for bonds and equities.

The Hubbard model including nearest neighbor interaction is studied at T50onad-dimensional hypercubic We present a detailed study of the phase diagram of the Kitaev-Hubbard chain, that is the Kitaev chain in the presence of a nearest-neighbor density-density interaction, using both analytical techniques as well as DMRG. In the case of a moderate attractive interaction, the model has the same phases as the noninteracting chain, a rections to the dynamical mean-ﬁeld phase diagram of the two-dimensional Hubbard model. Regions of antiferromagnetic, d-wave superconducting, pseudo-gapped non-Fermi liquid, and Fermi liquid behaviors are found, in rough agreement with the generic phase diagram of the cuprates. Phase Diagram of the Frustrated Hubbard Model. The Mott-Hubbard metal-insulator transition in the paramagnetic phase of the one-band Hubbard model has long been used to describe similar features in real materials like V 2 O 3. In this Letter we investigate the antiferromagnetic phase of this model with frustration. 2001-12-10 · Phase diagram of a disordered boson Hubbard model in two dimensions.
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Theory Colloquium: Topological Gravity and Matrix Models. Audio Player Solid State Theory Seminar: Quantum phase transitions, and the high temperature av J Dunevall · 2018 — Figure 1 shows a typical diagram of a nerve cell surrounded by a special class of glial This makes them a highly attractive model system for studies of exocytosis.44,45 At equilibrium, the net conversion rate is zero, which yields the following expression for the LANE, R. F., HUBBARD, A. T., & BLAHA, C. D. (1978).
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Phase diagram of the extended Hubbard model at weak coupling P. G. J. van Dongen Institut fu ¨r Theoretische Physik C, Rheinisch-Westfalische Technische Hochschule Aachen, 52056 Aachen, Germany ~Received 1 December 1995! The Hubbard model including nearest neighbor interaction is studied at T50onad-dimensional hypercubic

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You're not a number, a chart, or an entry in some computer. He was always supportive of me and a positive role model. Ellingson Conner Hubbard Issac Balmer Donald Olson Paige Larson Jakob Felger Emma Anderson Brianna Member Gunderson shared attending Phase I training this past week.

Ground state phase diagram of the Hubbard-Holstein model at the half-filling of the square lattice, and adiabaticity ratio ω We compute the ground-state phase diagram of the Hubbard and frustrated Hubbard models on the square lattice with density matrix embedding theory using Phase diagram of the extended Hubbard model including spin-orbit coupling on a honeycomb lattice to achieve the university degree of. MASTER'S THESIS. 3 Aug 2018 a multi-band Hubbard model under controlled conditions and parameters. Our main question is, how does the phase diagram (and the Electronic phase diagram in the half-filled ionic Hubbard model with site- dependent interactions Volume 531, 15 February 2018, Pages Bose-Hubbard model. Quantum gases in optical lattices. Many-body theory. - Phase diagram.

In this paper a brief review of the types of ideas which have been used to investigate the phase diagram of the Hubbard model is presented. No clear solution emerges although the competitions at work are established. The Bose–Hubbard model gives a description of the physics of interacting spinless bosons on a lattice.It is closely related to the Hubbard model which originated in solid-state physics as an approximate description of superconducting systems and the motion of electrons between the atoms of a crystalline solid. The model was first introduced by Gersch and Knollman in 1963 in the context of Phase diagram of the Mott transition in a two-band Hubbard model in infinite dimensions @article{no2001PhaseDO, title={Phase diagram of the Mott transition in a two-band Hubbard model in infinite dimensions}, author={Y. Ōno and R. Bulla and A. Hewson}, journal={The European Physical Journal B - Condensed Matter and Complex Systems}, year={2001}, volume={19}, pages={375-384} } Phase diagrams of the disordered Bose-Hubbard model with cavity-mediated long-range and nearest-neighbor interactions? Chao Zhanga and Heiko Rieger Theoretical Physics, Saarland University, 66123 Saarbruc ken, Germany Received 30 August 2019 / Received in nal form 13 December 2019 Published online 11 February 2020 c The Author(s) 2020.