Gutzwiller mean-field theory

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WebJul 22, 2024 · Local spectral function A (ω) for different values of J / U, as computed within Gutzwiller mean-field theory (blue line), DMFT with Hubbard-I impurity solver (dashed … WebMay 29, 2012 · We study in this paper a series of Gutzwiller projected wave functions for S = 1 spin chains obtained from a fermionic mean-field theory for general S > 1 / 2 spin systems [Liu, Zhou, and Ng, Phys. Rev. B 81, 224417 (2010)] applied to the bilinear-biquadratic (J-K) model.The free-fermion mean-field states before the projection are 1D …

[1207.6456] The Gutzwiller Density Functional Theory

WebMar 30, 2015 · In contrast to Gutzwiller mean-field theory and strong-coupling perturbative approaches, nonequilibrium bosonic dynamical mean-field theory captures not only dynamical transitions but also damping and thermalization effects at finite temperature. We apply the formalism to quenches in the Bose-Hubbard model, starting from both the … deep affinity

Gutzwiller projected wave functions in the fermionic theory of

WebQuasiparticle states near the surface of d-wave superconductors in a magnetic field are studied based on the t-J model on the 2D square lattice within the Gutzwiller approximation. We perform a calcu WebSep 2, 2013 · One truly legendary model is the Hubbard model, independently conceived by Martin Gutzwiller 1, ... the development of dynamical mean-field theory is a noteworthy … WebGutzwiller–RVB theory of high-temperature superconductivity: Results from renormalized mean-field theory and variational Monte Carlo calculations B. Edegger Institute for … federal tax on 180000 a year

Quantum Field Theory for the Three-Body Constrained Lattice Bose …

Quantum fluctuations beyond the Gutzwiller approximation in the …

WebMar 31, 2024 · From this representation one can project to single occupancy and evaluate the entanglement spectra after Gutzwiller projection. We then obtain the MPS and iMPS representation of Gutzwiller projected mean-field states that arise from the variational slave-fermion approach to the S = 1 bilinear-biquadratic quantum spin chain. WebJul 25, 2007 · Using both strong-coupling expansion and Gutzwiller mean-field theory, we chart out the phase diagrams of the bosons in the presence of such spin-orbit interaction. We compute the momentum ... deepa food houseWebDec 17, 2012 · Abstract. Hard-core and soft-core extended Bose-Hubbard models with fixed boson densities are studied by using the Gutzwiller variational wave function. The phase diagram of the softcore model strongly depends on its transfer integral. Specifically, a supersolid phase can be the ground state even below half-filling for a large transfer integral. deep africa web hosting

"WebMar 15, 1993 · Abstract. We carry out a complete Gutzwiller projection on Schwinger boson mean-field states of quantum Heisenberg models. For the 2-d spin- 2 antiferromagnet in a square lattice we obtain analytically a ground state energy of -0.3352 J /bond. The spin-spin correlation length behaves as ξ∼ ( J T) 1 2 exp (0.670 J/T ), with J⋍1300 K fitting ... " - Gutzwiller mean-field theory

Gutzwiller mean-field theory

(PDF) Dynamical Mean-Field Theory for Markovian Open

WebWe develop a quantum many-body theory of the Bose-Hubbard model based on the canonical quantization of the action derived from a Gutzwiller mean-field ansatz. Our theory is a systematic generalization of the Bogoliubov theory of weakly interacting gases. The control parameter of the theory, defined as the zero point fluctuations on top of the … WebJan 7, 2024 · The time-dependent Gutzwiller approximation is rederived on the basis of a variational wave function which is a direct product of a Slater determinant and a coherent …

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WebApr 2, 2014 · In this paper, we compare results obtained by two mean-field approaches—the perturbative mean-field and the Gutzwiller variational ansatz for the … WebJul 20, 2024 · We examine the zero- and finite-temperature phase diagrams of soft-core bosons of the extended Bose-Hubbard model on a square optical lattice. To study …

WebJul 27, 2012 · Jörg Bünemann. In this tutorial presentation, we give a comprehensive introduction into the Gutzwiller variational approach and its merger with the density … WebAug 9, 2012 · The Gutzwiller theory reproduces the mean-field result for the phase boundary between the superfluid phase and the Mott phase at zero temperature (D. Jaksch, C. Bruder et al., 1998). The mean-field approach becomes exact in the limit of infinite …

WebJul 15, 2005 · We find that bosons confined to higher bands of optical lattices allow for a rich phase diagram, including the supersolid phase. Using Gutzwiller, mean-field theory we establish the parameter regime necessary to maintain metastable states generated by an extended Bose-Hubbard model. WebWe study the zero-temperature phase diagram of two-dimensional hard-core bosons on a square lattice with nearest-neighbor and plaquette (ring-exchange) hoppings, at arbitrary densities, by means of a hierarchical mean-field theory. In the frustrated regime, where quantum Monte Carlo suffers from a sign problem, we find a rich phase diagram where …

WebWe develop a quantum many-body theory of the Bose-Hubbard model based on the canonical quantization of the action derived from a Gutzwiller mean-ﬁeld ansatz. Our …

WebI hold a position as a Postdoctoral Scholar - Teaching Fellow at the University of Southern California (USC), with a secondary role as a Visiting Researcher at the Information Sciences Institute ... deep aging societyhttp://www.scholarpedia.org/article/Gutzwiller_wave_function deepa here and nowWebJul 25, 2024 · Dynamical mean-field theory of strongly correlated fermion systems and the limit of infinite dimensions journal, January 1996. Georges, Antoine; Kotliar, Gabriel; Krauth, Werner; ... Here, we develop a hybrid quantum-classical simulation framework for correlated electron systems based on the Gutzwiller variational embedding approach. federal tax on 22000WebWe develop a quantum many-body theory of the Bose-Hubbard model based on the canonical quantization of the action derived from a Gutzwiller mean-ﬁeld ansatz. Our theory is a systematic generalization of the Bogoliubov theory of weakly interacting gases. The control parameter of the theory, deﬁned as the zero point deep afro house musicWebNov 21, 2008 · We introduce in detail our newly developed \\textit{ab initio} LDA+Gutzwiller method, in which the Gutzwiller variational approach is naturally incorporated with the density functional theory (DFT) through the "Gutzwiller density functional theory (GDFT)" (which is a generalization of original Kohn-Sham formalism). This method can be used … federal tax on 270000WebDec 1, 1993 · A mean field type theory is developed for the insulating RVB state and high temperature superconductivity in doped La 2 CuO 4 and other high-T c oxides. The T c as a function of the doping parameter δ drops sharply around ∼ δ. The zero temperature gap versus T c relation depends sensitively on the choice of the parameters. Gutzwiller … deep ai image to textWebOur theory is a systematic generalization of the Bogoliubov theory of weakly interacting gases. The control parameter of the theory, defined … federal tax on 235000