Phase Separation in the 2d Hubbard Model a Challenging Application of Fixed-node Qmc
نویسندگان
چکیده
منابع مشابه
A novel FLEX supplemented QMC approach to the Hubbard model
This paper introduces a novel ansatz-based technique for solution of the Hubbard model over two length scales. Short range correlations are treated exactly using a dynamical cluster approximation QMC simulation, while longer-length-scale physics requiring larger cluster sizes is incorporated through the introduction of the fluctuation exchange (FLEX) approximation. The properties of the resulti...
متن کاملAbstract Submitted for the MAR11 Meeting of The American Physical Society Spin-orbit interaction in quantum Monte Carlo LUBOS MITAS,
Submitted for the MAR11 Meeting of The American Physical Society Spin-orbit interaction in quantum Monte Carlo LUBOS MITAS, North Carolina State University, RENE DERIAN, Institute of Physics, Slovak Academy of Sciences, SHI GUO, North Carolina State University — For spinless Hamiltonians (ie, no explicit spin operators), real space quantum Monte Carlo (QMC) methods such as variational and fixed...
متن کاملPhase diagram of the three-dimensional Hubbard model at half filling
We investigate the phase diagram of the three-dimensional Hubbard model at half filling using quantumMonte Carlo (QMC) simulations. The antiferromagnetic Néel temperature TN is determined from the specific heat maximum in combination with finite-size scaling of the magnetic structure factor. Our results interpolate smoothly between the asymptotic solutions for weak and strong coupling, respecti...
متن کاملCharge-spin separation in 2D Fermi systems: Singular interactions as modified commutators, and solution of the 2D Hubbard model in the bosonized approximation.
The general 2-dimensional fermion system with repulsive interactions (typified by the Hubbard Model) is bosonized, taking into account the finite on-shell forward scattering phase shift derived in earlier papers. By taking this phase shift into account in the bosonic commutation relations a consistent picture emerges showing the chargespin separation and anomalous exponents of the Luttinger liq...
متن کاملDual theory of the superfluid-Bose glass transition in disordered Bose-Hubbard model in one and two dimensions
I study the zero-temperature phase transition between superfluid and insulating ground states of the Bose-Hubbard model in a random chemical potential and at large integer average number of particles per site. Duality transformation maps the pure Bose-Hubbard model onto the sine-Gordon theory in one dimension (1D), and onto the three dimensional Higgs electrodynamics in two dimensions (2D). In ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1998