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Gutzwiller mean-field theory

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

Equivalence of Gutzwiller and slave-boson mean-field theories

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 … WebApr 22, 1991 · This approach uncovers the limitations of the Gutzwiller approximation and clarifies its connection to the "auxiliary-boson" mean- field theory of the Anderson model, leading to a novel strong-coupling mean-field theory which allows for a unified treatment of antiferromagnetism and ferromagnets, metal-to-insulator transition, and Kondo … fit ayrshire babies https://tfcconstruction.net

Equivalence of Gutzwiller and slave-boson mean-field theories

WebDec 21, 2004 · Abstract. We extend the results of Lewenstein et al. [Phys. Rev. Lett. 92 (2004) 050401] and determine the phase diagram of a mixture of ultracold bosons and polarized fermions placed in an optical lattice using mean field theory. We obtain the analytic form of the phase boundaries separating the composite fermion phases that … 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 … WebMar 6, 2024 · In this paper, we study the two-components extended BH model on a two-dimensional(2D) square lattice. By employing the inhomogeneous dynamical Gutzwiller mean-field theory (DGMFT) , , , we reveal the quantum phases in which the order parameter and occupancy are displayed site by site. With periodic boundary condition, … fit ayrshire dads

Phys. Rev. X 11, 031018 (2024) - Dynamical Mean-Field …

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Gutzwiller mean-field theory

(PDF) Dynamical Mean-Field Theory for Markovian Open

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 ... WebDec 16, 2009 · The procedure can be seen as a proper quantization of the Gutzwiller mean field theory. The theory is conveniently evaluated in the framework of the quantum effective action, for which the usual symmetry principles are now supplemented with a ``constraint principle'' operative on short distances. We test the theory via investigation …

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 … WebWe test the accuracy of this wave- tion [6], Density-Matrix Renormalization Group [7] and function in the Hubbard-Holstein model on a Bethe lat- Dynamical Mean-Field Theory (DMFT) [8, 9] or exten- tice, where analytical results can be obtained and com- sions [10].

WebMay 14, 2014 · Gutzwiller mean-field method in Bose Hubbard model. Gutzwiller mean-felid method is an efficient way to study Bose-Hubabrd model in optical lattice with a … WebThe calculation of expectation values for Gutzwiller wave-functions is a straightforward task, once the basic structure of diagrams in infinite dimensions is understoodbgw ; prb98 ; narlikar .In contrast, the derivation of the generalized slave-boson mean-field theory in Ref. [lechermann, ] requires a number of subtle ideas.Furthermore, there is not a clear …

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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WebMartin Charles Gutzwiller (12 October 1925 – 3 March 2014) was a Swiss-American physicist, known for his work on field theory, quantum chaos, and complex systems. He … canfield apartments st louis mohttp://www.scholarpedia.org/article/Gutzwiller_wave_function canfield assisted living beaverton oregonWebAug 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 … canfield armory