Researcher of the National Laboratory for Scientific Computing (LNCC) of the Ministry of Science and Technology (MCT).

Visiting professor in the Department of Applied Mathematics at the University of Waterloo from December, 2007 until December 2008 (Grant from CAPES). 

Visiting professor in the Department of Physics at Queen's University at Kingston from April until December, 1998.

Visiting professor in the Department of Applied Mathematics and  the Symbolic Computation Group in the Faculty of Mathematics at the University of Waterloo from December, 1996 until March, 1998.

Previous position at CBPF (Brazilian Center for Research in Physics).


Research interest: Quantum Computing, Quantum Information, Quantum Algoritmhs, Quantum Walk, Computer Algebra.

Home Page of

photo   

Renato Portugal


   Currently Organizing Weciq 2010:   http://qubit.lncc.br/weciq

 

   Member of PRONEX: Approximate, Quantum and Randomized Algorithms for Fundamental Combinatorial Problems.

 

   Recent Thesis Defenses:

            Franklin de Lima Marquezino, Analysis, Simulation and Application of Quantum Walks, PhD thesis, LNCC, Feb 2010.

Papers:

·         F.L. Marquezino, R. Portugal, G. Abal and R. Donangelo, "Mixing Times in Quantum Walks on the Hypercube", Physical Review A 77, 042312(2008), arXiv:0712.0625, 2008.

·         F.L. Marquezino and R. Portugal, "The QWalk Simulator of Quantum Walks", Computer Physics Communications, v. 179, p. 1, 2008.  arXiv:0803.3459.

·         G. Abal, R. Donangelo, F.L. Marquezino, R. Portugal, Decoherence in Search Algorithms. In: SEMISH 2009 (CSBC), 2009, Bento Gonçalves. Anais do XXIX Congresso da Sociedade Brasileira de Computação, 2009. arXiv:0912.1523

·         G. Abal, R. Donangelo, F.L. Marquezino, R. Portugal, Spatial search in a honeycomb network, accepted in Mathematical Structures on Computer Science, arXiv:1001.1139.

·         F.L. Marquezino, R. Portugal, and G. Abal, Mixing Times in Two-dimensional Grids, submitted to Physical Review A (2010).

·         F.L. Marquezino, R. Portugal and F.D. Sasse, "Obtaining the Quantum Fourier Transform from the Classical FFT with QR Decomposition", Journal of Computational and Applied Mathematics, v. 235, p. 74-81, 2010.

 

Raqueline A. M. Santos, Quantum Markov Chains, M.Sc., LNCC, March 2010.
Prize: Best Master Dissertation of 2010, SBMAC.

Papers:

·         R.A.M. Santos and R. Portugal, Quantum Hitting Time on the Complete Graph, accepted in International Journal of Quantum Information. arXiv:0912.1217

 

   Master or PhD supervision: quantum algorithms, quantum computing, quantum error correcting codes. Write an email to Portugal at Lncc dot br. Students of all grades are welcome. Post-doc applications are also welcome.

 

    Quantum Computing Group at LNCC:   http://qubit.lncc.br/

    Review on Quantum Computation (Renato Portugal)


    The Invar Package: A fast kernel for tensor manipulators using computational group algorithms:  here.
    The Canon Package: A fast kernel for tensor manipulators using computational group algorithms:  here.
                         New version coming soon (simplication using cyclic relations).

    Booklet on Maple (release 6 or up)

    Paper on Mathieu Functions:

D. Frenkel and R. Portugal, Algebraic Methods to Compute Mathieu Functions, Journal of Physics A: Mathematical and General, 34, 3541-3551 (2001):   ps   pdf        See also:  Errata

See citations of this paper at Mathematica's web pages:

  

  Research Areas:

    Current Collaborators:

Achim Kempf (University of Waterloo)
José M. Martín-García (CSIC)
Gonzalo Abal (Universidad de la República)
Guilherme Leal (UFRJ)
Raul Donangelo (UFRJ)

    Pos-docs supervision:

If  you have interest, please send me an email. Areas of strong interest: Quantum Walk, Algorithms for quantum computing, Hidden subgroup problem, Computer algebra in physics, Quantum Information and others. There are fellowships available.

 

    Current PhD Students:

 

·         Douglas Santiago

·         Jalil Khatibi Moqadam

·         Raqueline A. Medeiros Santos

 

If you have interest in PhD supervision, send me an email. LNCC has a multidisciplinal doctorate with available fellowships depending on the school record of the candidates.

 

    Past Students:

 

    Recent Courses:

       Email:

                   portugal@lncc.br

Packages in Maple:

Riegeom Home Pages : Abstract manipulation of tensors in Riemannian geometry

Riemann Home Pages: Maple package for component calculations in General Relativity

Analysis of Membrane Oscillations using Maple: Maple package and worksheets.

Virtual Book about Programming in Maple (in Portuguese): The worksheets are available or one can read the book on line.

Introduction to Maple (in Portuguese): A booklet to learn the basic concepts.

Maple Course: Latest material about the algebraic part and programming in Maple

Propagation of Sound Waves in Spherical Cavities in Maple: Worksheets available

Poetry: some of my poems (in portuguese)

Some physicists might consider the following say: "Man Know of Thyself  and Thus Know the World", Apollo's Temple at Delfos, Greece.

Address:

Laboratório Nacional de Computação Científica
Av. Getúlio Vargas, 333, Quitandinha, Petrópolis - RJ
Brasil
Caixa Postal 95.113
CEP: 25.651-070

Tel.: +55-24-2233-6069
Fax.: +55-24-2231-5595

Office: 2A48 

Last update: 2010.  
Keywords: computação quântica, Computação Quântica, computacao quantica, Computacao Quantica,
quantum computation, quantum computing, Quantum Computation, Quantum Computing, qubit, Qubit, Shor, Grover