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SU(2) x SU(2) bi-spinor structure entanglement and additional quantum correlations exhibited by Dirac-like systems as graphene and trapped ions

Grant number: 15/05903-4
Support type:Regular Research Grants
Duration: June 01, 2015 - May 31, 2017
Field of knowledge:Physical Sciences and Mathematics - Physics - General Physics
Principal Investigator:Alex Eduardo de Bernardini
Grantee:Alex Eduardo de Bernardini
Home Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil

Abstract

Recently one has observed that the entanglement between SU(2) x SU(2) internal degrees of freedom of parity and helicity Dirac-like particles corresponding to SU(2) x SU(2) polarized structures can be straightforwardly translated into a useful theoretical tool for obtaining the spin-spin entanglement in the context of enlarged scenarios of nonrelativistic 2D systems, as for instance those for describing single (or even double) layer graphene, or single trapped ions with Dirac bi-spinor mathematical structure.Dirac-like global potentials driven by (pseudo)scalar, (pseudo)vector and tensor interactions may therefore destroy the SU(2) x SU(2) separability and create quantum correlations (as for instance, the entanglement of formation) of controllable systems with enormous physical appeal when mapped onto the bi-spinor structure.Some of ours recent assertive results establishes that the SU(2) x SU(2) group structure of Dirac bi-spinors are are assigned to a Dirac Hamiltonian written in terms of the direct product of two-qubit operators, from which the free particle solutions of the Dirac equation are given in terms of SU(2) x SU(2) parity-spin entangled states.The preliminary purpose of our project is to quantify the role of (pseudo)scalar, (pseudo)vector and tensor interactions in producing/destroying quantum correlations in SU(2) x SU(2) bi-spinor structures.Considering that low-energy excitations of a nonrelativistic electrons in the single layer graphene exhibits a massless Weyl spinor structure often related to 2D Dirac equation solutions supported by a SU(2) structure, the quantum separability of electron-electron or electron-hole describe through such structures can be quantified under different circumstances of interaction.Analogously, noticing that the trapped-ions work as a flexible platform to map several suitable effects in relativistic Dirac quantum mechanics (as for instance, in discussing the planar diffusion and the 2D scattering of the correspondingbi-spinor structures), our final aim consists in applying the framework for quantifying the pertinent quantum correlations related to the trapped-ion physics. (AU)

Scientific publications (12)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
SANTOS, JONAS F. G.; BERNARDINI, ALEX E. Quantum engines and the range of the second law of thermodynamics in the noncommutative phase-space. EUROPEAN PHYSICAL JOURNAL PLUS, v. 132, n. 6 JUN 13 2017. Web of Science Citations: 6.
BITTENCOURT, VICTOR A. S. V.; BERNARDINI, ALEX E. Lattice-layer entanglement in Bernal-stacked bilayer graphene. Physical Review B, v. 95, n. 19 MAY 19 2017. Web of Science Citations: 5.
BITTENCOURT, VICTOR A. S. V.; BERNARDINI, ALEX E. Schrodinger cat and Werner state disentanglement simulated by trapped ion systems. JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, v. 50, n. 7 APR 14 2017. Web of Science Citations: 3.
BERNARDINI, ALEX E.; BRAGA, NELSON R. F.; DA ROCHA, ROLDAO. Configurational entropy of glueball states. Physics Letters B, v. 765, p. 81-85, FEB 10 2017. Web of Science Citations: 30.
BERNARDINI, ALEX E.; DA ROCHA, ROLDAO. Entropic information of dynamical AdS/QCD holographic models. Physics Letters B, v. 762, p. 107-115, NOV 10 2016. Web of Science Citations: 27.
BERNARDINI, ALEX E.; DA ROCHA, ROLDAO. Perturbatively deformed defects in Poschl-Teller-driven scenarios for quantum mechanics. Physics Letters A, v. 380, n. 29-30, p. 2279-2287, JUL 1 2016. Web of Science Citations: 6.
BASTOS, CATARINA; BERNARDINI, ALEX E.; BERTOLAMI, ORFEU; DIAS, NUNO COSTA; PRATA, JOAO NUNO. Bell operator and Gaussian squeezed states in noncommutative quantum mechanics. Physical Review D, v. 93, n. 10 MAY 26 2016. Web of Science Citations: 9.
BITTENCOURT, VICTOR A. S. V.; BERNARDINI, ALEX E.; BLASONE, MASSIMO. Quantum transitions and quantum entanglement from Dirac-like dynamics simulated by trapped ions. Physical Review A, v. 93, n. 5 MAY 17 2016. Web of Science Citations: 7.
SANTOS, JONAS F. G.; BERNARDINI, ALEX E. Gaussian fidelity distorted by external fields. PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS, v. 445, p. 75-84, MAR 1 2016. Web of Science Citations: 4.
BITTENCOURT, VICTOR A. S. V.; BERNARDINI, ALEX E. Entanglement of Dirac bi-spinor states driven by Poincare classes of SU(2) circle times SU(2) coupling potentials. ANNALS OF PHYSICS, v. 364, p. 182-199, JAN 2016. Web of Science Citations: 7.
BERNARDINI, ALEX E.; DA ROCHA, ROLDAO. Matter Localization on Brane-Worlds Generated by Deformed Defects. Advances in High Energy Physics, 2016. Web of Science Citations: 9.
SANTOS, JONAS F. G.; BERNARDINI, ALEX E.; BASTOS, CATARINA. Probing phase-space noncommutativity through quantum mechanics and thermodynamics of free particles and quantum rotors. PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS, v. 438, p. 340-354, NOV 15 2015. Web of Science Citations: 9.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.