Author pages are created from data sourced from our academic publisher partnerships and public sources.

Publications Influence

Groupoid symmetry and constraints in general relativity

- Christian Blohmann, M. Fernandes, A. Weinstein
- Mathematics, Physics
- 15 March 2010

When the vacuum Einstein equations are cast in the form of hamiltonian evolution equations, the initial data lie in the cotangent bundle of the manifold M\Sigma\ of riemannian metrics on a Cauchy… Expand

37 6- PDF

Algebraic Criteria for Entanglement in Multipartite Systems

- J. D. M. Vianna, M. Trindade, M. Fernandes
- Mathematics
- 1 April 2008

Abstract
Quantum computing depends heavily on quantum entanglement. It has been known that geometric models for correlated two-state quantum systems (qubits) can be developed using geometric algebra.… Expand

8 1

Groupoid symmetry and constraints in general relativity. 1: kinematics

- Christian Blohmann, M. Fernandes, A. Weinstein
- Mathematics
- 15 March 2010

10 1

Image processing in a μc-Si:H p–i–n image transducer

- F. S. D. Sousa, J. Martins, M. Fernandes, A. Maçarico, R. Schwarz, M. F. Vieira
- Materials Science
- 1 May 2000

Abstract A two-dimensional p–i–n imager based on μc-Si:H material is analysed. The basic building block for the sensor element is a transparent conductive oxide (TCO)/μc-p–i–n Si:H photodiode with… Expand

7

The eye is the window to the diagnosis: tuberculous meningoencephalitis with choroidal tubercle

- M. Fernandes, Bruna Meira, J. Marto, A. Correia, J. Costa, M. Viana-Baptista
- Medicine
- Practical Neurology
- 19 August 2019

A 65-year-old Caucasian man with type 2 diabetes mellitus presented to the emergency department with subacute altered mental status, preceded by a 2-month history of progressive weight loss, anorexia… Expand

On the Generalized Phase Space Approach to Duffin-Kemmer-Petiau Particles

- M. Fernandes, J. D. M. Vianna
- Mathematics
- 1 February 1999

We present a general derivation of the Duffin-Kemmer-Petiau (D.K.P) equation on the relativistic phase space proposed by Bohm and Hiley. We consider geometric algebras and the idea of algebraic… Expand

13

Quantum mechanics on phase space: The hydrogen atom and its Wigner functions

- P. Campos, M. Martins, M. Fernandes, J. D. M. Vianna, J. D. M. Vianna
- Physics
- 1 March 2018

Abstract Symplectic quantum mechanics (SQM) considers a non-commutative algebra of functions on a phase space Γ and an associated Hilbert space H Γ , to construct a unitary representation for the… Expand

3

Galilean-Covariant Clifford Algebras in the Phase-Space Representation

- J. D. M. Vianna, M. Fernandes, A. Santana
- Mathematics
- 2005

We apply the Galilean covariant formulation of quantum dynamics to derive the phase-space representation of the Pauli–Schrödinger equation for the density matrix of spin-1/2 particles in the presence… Expand

9

Supersymmetric symplectic quantum mechanics

- Miralvo B. de Menezes, M. Fernandes, M. Martins, A. Santana, J. D. M. Vianna, J. D. M. Vianna
- Physics
- 1 February 2018

Abstract Symplectic Quantum Mechanics SQM considers a non-commutative algebra of functions on a phase space Γ and an associated Hilbert space H Γ to construct a unitary representation for the Galilei… Expand

Symplectic Field Theories: Scalar and Spinor Representations

- C. Costa, Marcia R. Tenser, R. Amorim, M. Fernandes, A. Santana, J. D. M. Vianna
- Mathematics
- 26 February 2018

Using elements of symmetry, as gauge invariance, aspects of field theories represented in symplectic space are introduced and analyzed under physical bases. The states of a system are described by… Expand