Amir Ordacgi Caldeira

• Abstract

  In the last two decades, important advances have been made in our understanding of how systems at the microscale and nanoscale exchange energy with the environment that they are inevitably embedded in. At the forefront of these advances has been the development of a suite of fluctuation relations that provide precise relationships between í thermodynamic quantities, such as work and free-…

  Materials World Network: investigations of quantum fluctuation relations using superconducting Qubits, AP.R

• Abstract

  The field of quantum information concerns the study of methods for characterizing, transmitting, processing, storing, compressing and utilizing information contained in quantum mechanical systems. This interest has led to the detailed investigation of a large number of physical systems in search of candidate architecture in which to implement these techniques. Quantum information is a mul…

  National Institute of Science and Technology - Quantum Information, AP.TEM

• Abstract

  This project focuses on condensed matter systems whose electronic properties are dominated by correlation effects. The problems to be studied can be divided in three classes: a) correlated systems with low dimensionality; b) magnetic or superconducting systems; c) disordered systems. The envisaged approach, which encompasses a variety of techniques going from the traditional to the innova…

  Non-perturbative methods applied to strongly correlated electronic systems, AP.TEM

(Only some records are available in English at this moment)

• Abstract

  Experimental realization of Dirac and Weyl semimetals in 2014 has increased the interest on the topic. Equivalently to graphene, these materials are characterized by massless quasiparticles which are described by the Weyl Hamiltonian. Such equation admits chiral modes when subjected to an external magnetic field, which are responsible for the so-called chiral anomaly at low energies. The …

  Topological and transport properties of chiral materials, BP.PD

• Abstract

  The aim of this research project, as an extension of our previous work, is to study the effects of a current-current-like interaction in low dimensional electronic systems as in small discrete rings and two-dimensional lattices. We will assume the existence of an interaction that, contrary to that described by the Breit-Darwin Hamiltonian, is able to attract antiparallel currents and also…

  Current-current interaction in low dimensional electronic systems, BP.DR

• Abstract

  Throughout this research project, our main goal is to study and develop strategies to protect different quantum gates through the dynamic decoupling techniques. One of the topics of this project is based on more realistic models, where the relative distance of qubits can vary during the quantum gate. In this case, we will focus our attention on time-dependent interaction Hamiltonians whe…

  Protection of quantum algorithms and logic gates in open quantum systems, BP.PD

(Only some records are available in English at this moment)

• Abstract

  A new family of high-temperature superconductors have attracted a lot of attention from the scientific community since their discovery in 2008: the iron-based superconductors (FeSCs). It is known that the superconductivity dome in the FeSCs is in the vicinity of both a magnetic and a nematic phase and that why several works available in the literature have investigated the role that the n…

  Pairing induced by the interplay between nematic and magnetic fluctuations in iron-based superconductors, BE.EP.DR

• Abstract

  We shall study the topological invariant definitions in topological insulators and superconductors. We will search for a definition, different from the usual ones, which is robust, describing and characterizing in an adequate manner the systems of interest when and even if interactions between the particles are present. (AU)

  Searching for a new definition of topological invariant, BE.EP.DD