Why are insulators insulating and metals conducting?
R Resta - Journal of Physics: Condensed Matter, 2002 - iopscience.iop.org
At variance with what happens in metals, the electronic charge in insulators cannot flow
freely under an applied dc field, and undergoes instead static polarization. These two …
freely under an applied dc field, and undergoes instead static polarization. These two …
Quantum critical points and the sign problem
The “sign problem”(SP) is a fundamental limitation to simulations of strongly correlated
matter. It is often argued that the SP is not intrinsic to the physics of particular Hamiltonians …
matter. It is often argued that the SP is not intrinsic to the physics of particular Hamiltonians …
Tricritical behavior in the extended Hubbard chains
M Nakamura - Physical Review B, 2000 - APS
Phase diagrams of the one-dimensional extended Hubbard model (including nearest-
neighbor interaction V) at half-and quarter-filling are studied by observing level crossings of …
neighbor interaction V) at half-and quarter-filling are studied by observing level crossings of …
One-dimensional flat bands in twisted bilayer germanium selenide
DM Kennes, L ** in an interacting two-component fermionic Rice-Mele Hubbard model
A Thouless pump transports an integer amount of charge when pum** adiabatically
around a singularity. We study the splitting of such a critical point into two separate critical …
around a singularity. We study the splitting of such a critical point into two separate critical …
Topological phase transitions in the repulsively interacting Haldane-Hubbard model
Using dynamical mean-field theory and exact diagonalization we study the phase diagram
of the repulsive Haldane-Hubbard model, varying the interaction strength and the sublattice …
of the repulsive Haldane-Hubbard model, varying the interaction strength and the sublattice …
Two-site entropy and quantum phase transitions in low-dimensional models
Ö Legeza, J Sólyom - Physical review letters, 2006 - APS
We propose a new approach to study quantum phase transitions in low-dimensional lattice
models. It is based on studying the von Neumann entropy of two neighboring central sites in …
models. It is based on studying the von Neumann entropy of two neighboring central sites in …
Can correlations drive a band insulator metallic?
We analyze the effects of the on-site Coulomb repulsion U on a band insulator using
dynamical mean field theory (DMFT). We find the surprising result that the gap is suppressed …
dynamical mean field theory (DMFT). We find the surprising result that the gap is suppressed …
Quantum critical behavior of the one-dimensional ionic Hubbard model
We study the zero-temperature phase diagram of the half-filled one-dimensional ionic
Hubbard model. This model is governed by the interplay of the on-site Coulomb repulsion …
Hubbard model. This model is governed by the interplay of the on-site Coulomb repulsion …
Cold-atom quantum simulator for string and hadron dynamics in non-Abelian lattice gauge theory
We propose an analog quantum simulator for simulating real-time dynamics of (1+ 1)-
dimensional non-Abelian gauge theory well within the existing capacity of ultracold-atom …
dimensional non-Abelian gauge theory well within the existing capacity of ultracold-atom …