Hubbard model
The Bose-Hubbard Model is QMA-complete
... Bose-Hubbard model is a system of interacting bosons that live on the vertices of a ...Bose-Hubbard model on a graph at fixed particle number is QMA- ...
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Efficient ground-state evaluation of the Hubbard model using an approach of the Lanczos method
... In the Hubbard model, the Lanczos method is quite efficient when the two competing parameters, i.e., the hopping amplitude t and the Coulomb interaction strength U are of the same order of magnitude ...
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Critical temperature for the two-dimensional attractive Hubbard model
... this model allows one to introduce disorder on the fermionic degrees of freedom 7,8 and investigate the behavior near the quantum critical point of the two-dimensional insulator- superconductor transition; this ...
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Using entanglement to discern phases in the disordered one dimensional Bose Hubbard model
... Quantum Monte Carlo has been employed in 1, 2 and 3 dimensions [18–23], but these methods become difficult in the limit of zero temperature. An ideal method for analysing one-dimensional systems is the density-matrix RG ...
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Universal Thermodynamics of the One-Dimensional Attractive Hubbard Model
... 1D Hubbard model is accessible through two al- ternative approaches – the thermodynamic Bethe ansatz (TBA) equations [31] and the quantum transfer matrix [67, ...1D Hubbard model has not yet ...
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Determinant quantum Monte Carlo study of exciton condensation in the bilayer Hubbard model
... In conclusion, we have performed a DQMC simulation of the extended bilayer Hubbard model to study possible exciton condensation in p/n-doped bilayers. With the Woodbury update we introduced a method that ...
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Tomonaga Luttinger Unusual Exponents around Fermi Points in the One Dimensional Hubbard Model
... one-dimensional Hubbard model in the presence of external magnetic field through the conformal field ...the model in the presence of a magnetic field are de- veloped by solving the dressed charge ...
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Propagation of quantum correlations after a quench in the Mott-insulator regime of the Bose-Hubbard model
... Bose-Hubbard model, because the non-equilibrium many-body quantum dynamics in this system can be tested in high- precision experiments using ultra-cold atoms in optical lattices ...
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Persistent current and Drude weight for the one dimensional Hubbard model from current lattice density functional theory
... repulsive Hubbard model is extended to current-LDFT ...mesoscopic Hubbard rings threaded by a magnetic flux are then systematically investigated by this ...
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Helicity modulus in the two-dimensional Hubbard model
... The helicity modulus, which is the stiffness associated with a twisted order parameter, for the two-dimensional Hubbard model is calculated for the equivalent cases of (i) attractive on-[r] ...
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Machine learning density functional theory for the Hubbard model
... (Received 30 October 2018; revised manuscript received 30 January 2019; published 15 February 2019) The solution of complex many-body lattice models can often be found by defining an energy functional of the relevant ...
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Exotic attractors of the non equilibrium Rabi Hubbard model
... FIG. 2. (a) Mean-field phase diagram of driven-dissipative Rabi-Hubbard model at g ¼ g 0 , ω ¼ ω 0 , calculated by linear stability analysis of the normal state. The color scale indicates the wave vector of ...
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Floquet engineering of correlated tunneling in the Bose-Hubbard model with ultracold atoms
... data. The observed ratio is different from 3, as one may expect from the delocalization process of a single atom by counting nearest neighbors. This we attribute to the presence of many particles that all take part ...
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Low-temperature behavior of the large-U Hubbard model from high-temperature expansions
... ing a Fermi-liquid-like interaction in energy space. V we show how to use the density of states to calcu- late zeros of the inverse susceptibility. Section VI deals with the noninteracti[r] ...
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String hypothesis for the AdS 5 x S^5 mirror
... consequence the variables v and w come in complex conjugate pairs, or are real. It is the set of Bethe-Yang equations (1.1) we will be using in the paper to analyze the solutions which contribute in the thermodynamic ...
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Direct detection of metal-insulator phase transitions using the modified Backus-Gilbert method
... the Hubbard model on the hexagonal lattice and the Hubbard-Coulomb model on the square ...the Hubbard model on the hexagonal lattice and we find that our new method for AC allows ...
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Projector self consistent DFT plus U using nonorthogonal generalized Wannier functions
... We present a formulation of the density-functional theory + Hubbard model (DFT+U ) method that is self-consistent over the choice of Hubbard projectors used to define the correlated subspaces. In ...
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Langer, Stephan Markus (2012): Transport and real-time dynamics in one-dimensional quantum magnets and ultra-cold atomic gases. Dissertation, LMU München: Fakultät für Physik
... Fermi-Hubbard model [22,23]), starting from an almost perfect band ...Heisenberg model renders its spin transport ballistic away from zero total magnetization [24–26], whereas at zero magnetization ...
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Hilker, Timon (2017): Spin-resolved microscopy of strongly correlated fermionic many-body states. Dissertation, LMU München: Fakultät für Physik
... the Hubbard model has been reported with the obser- vation of nearest-neighbor correlations via singlet-triplet spin oscillations [67, 193, 194] and short range correlations deduced from optical Bragg ...
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Assessment of the GW Approximation using Hubbard Chains
... The properties of the Hubbard model have been thoroughly investigated. In par- ticular, the one-dimensional case can be solved analytically using the Bethe ansatz [4] and, in the limit of infinite chain ...
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