48 citations · 111 across the 10 of their papers we have counts for
10 papers
Real-Space Spectral Approach to Orbital Magnetization
Kevin J. U. Vidarte, Henrique P. Veiga, João M. Viana Parente Lopes +4
We present a real-space spectral method for computing the orbital magnetization of crystals. Starting from the commutator form of the orbital magnetization operator, we formulate a…
Plasmon polariton assisted second-harmonic generation in graphene
João M. Alendouro Pinho, Simão S. Cardoso, Yuliy V. Bludov +4
In this paper we present a theoretical examination of second-harmonic generation (SHG) in a graphene monolayer integrated within an attenuated total internal reflection (ATR) confi…
Markov Inequality as a Tool for Linear-Scaling Estimation of Local Observables
H. P. Veiga, D. R. Pinheiro, J. P. Santos Pires +1
We introduce a linear-scaling stochastic method to compute real-space maps of any positive local spectral operator in a tight-binding model. By employing positive-definite estimato…
Semiconductor Wannier equations: a real-time, real-space approach to the nonlinear optical response in crystals (ATATA)
Eduardo B. Molinero, Bruno Amorim, Misha Ivanov +6
We develop the semiconductor Wannier equations (SWEs), a real-time, real-space formulation of ultrafast light-matter dynamics in crystals, by deriving the equations of motion for t…
Unambiguous Simulation of Diffusive Charge Transport in Disordered Nanoribbons
H. P. Veiga, S. M. João, J. M. Alendouro Pinho +2
Charge transport in disordered two-dimensional (2D) systems showcases a myriad of unique phenomenologies that highlight different aspects of the underlying quantum dynamics. Electr…
Fast Fourier-Chebyshev approach to real-space simulations of the Kubo formula
Santiago Giménez de Castro, João M. Viana Parente Lopes, Aires Ferreira +1
The Kubo formula is a cornerstone in our understanding of near-equilibrium transport phenomena. While conceptually elegant, the application of Kubo's linear-response theory to inte…
Numerical tests of the large charge expansion
Gabriel Cuomo, J. M. Viana Parente Lopes, José Matos +2
We perform Monte-Carlo measurements of two and three point functions of charged operators in the critical O(2) model in 3 dimensions. Our results are compatible with the prediction…
High-resolution real-space evaluation of the self-energy operator of disordered lattices: Gade singularity, spin-orbit effects and p-wave superconductivity
Simão M. João, J. M. Viana Parente Lopes, Aires Ferreira
Disorder is a key factor influencing the behavior of condensed states of matter, however the true extent of its impact is generally difficult to determine due to the prominent role…
A structural test for the conformal invariance of the critical 3d Ising model
Simao Meneses, Joao Penedones, Slava Rychkov +2
How can a renormalization group fixed point be scale invariant without being conformal? Polchinski (1988) showed that this may happen if the theory contains a virial current -- a n…
Exact Solution of Ising Model on a Small-World Network
J. Viana Lopes, Yu. G. Pogorelov, J. M. B. Lopes dos Santos +1
We present an exact solution of a one-dimensional Ising chain with both nearest neighbor and random long-range interactions. Not surprisingly, the solution confirms the mean field…