Hubbard model with Lüscher fermions
نویسندگان
چکیده
منابع مشابه
Hubbard Model and Lüscher fermions
Recently a new type of algorithms for numerical simulations of models with dynamical fermions has been proposed by M. Lüscher [1]. The idea is based on the approximation of a fermionic determinant by the path integral over some number of bosonic fields, which allows ones to elegantly avoid the main difficulty coming from the nonlocality of the fermionic determinant. The complexity of a sweep of...
متن کاملar X iv : h ep - l at / 9 41 21 14 v 1 3 1 D ec 1 99 4 1 Hubbard Model with Lüscher fermions
First applications of the new algorithm simulating dynamical fermions are reported. The method reproduces previous results obtained with different techniques. The problem of dynamical fermions, even though solved in principle, still provides the considerable challenge in practice. Existing exact algorithms require huge computing resources due to the strong correlations between generated configu...
متن کاملar X iv : h ep - l at / 9 70 30 05 v 1 8 M ar 1 99 7 Hubbard Model with Lüscher fermions
We study the basic features of the two-dimensional quantum Hubbard Model at half-filling by means of the Lüscher algorithm and the algorithm based on direct update of the determinant of the fermionic matrix. We implement the Lüscher idea employing the transfer matrix formalism which allows to formulate the problem on the lattice in (2+1) dimensions. We discuss the numerical complexity of the Lü...
متن کاملThe Hubbard Model, Spinless Fermions, and Ising Spins
The Hubbard model is used to study an electronic system at half filling. Starting from a functional integral representation the spinup Grassmann field is integrated out. It is shown that the resulting spinless fermion theory has an instantaneous cluster interaction, and that the spinless fermions are coupled to thermally fluctuating Ising spins. The coupling parameter of the spinless fermion in...
متن کاملExploring competing density order in the ionic Hubbard model with ultracold fermions.
We realize and study the ionic Hubbard model using an interacting two-component gas of fermionic atoms loaded into an optical lattice. The bipartite lattice has a honeycomb geometry with a staggered energy offset that explicitly breaks the inversion symmetry. Distinct density-ordered phases are identified using noise correlation measurements of the atomic momentum distribution. For weak interac...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 1998
ISSN: 0550-3213
DOI: 10.1016/s0550-3213(98)00028-5