In the last decade the multicore processors had emerged with the comeback of the symmetric multiprocessing (SMP) after a long decade in which the based OpenMPI clusters had dominated the high performace processing world. Actually, we have in the market 2, 4 and 6 multicore processors; the Cell BE processors with a Power Processor Element (PPE) and 8 vectorial processors called Synergistic Processor Element (SPE), and graphics processors which have from 48 to 448 cores dedicated to numerical tasks. In the present work, we show our experience in the interaction with these processors, discussing the programming techniques and the future possibilities for making low cost numerical tasks.

In this work, we analyze the electron transport in rectangular conductors in which we insert a nanopore which restrict the carrier flux. Actually, to setup molecules at middle of the nanopore, we observe resonances and anti-resonances in the transmission coefficient when the molecule orientation is parallel or perpendicular to carrier flux. In our case, the conductor is described by a tight binding approximation, the transmission coefficients through the system are calculated by Landauer formula considering a ballistic regime at low temperatures and the out of equilibrium Green functions to permit us calculate the coupling of the leads with conductor including the nanopore and the molecules, recursively. The presence of the molecules at middle of the nanopore are described, also, by the tight binding approximation.

We analyze the electronic transport in a graphene nanodevice with a rectangular nanopore in the presence of different configurations molecules at the nanopore’s center. The behaviour of the electrons is described by the tight-binding method and the transport in the ballistic regime by the Landauer’s formula, where the electrical conductance is given by the transmission coefficient, which is determined using the non-equilibrium Green’s functions. The nanodevice is connected to two graphene semi-infinite contacts. The results show that the presence of molecules at the nanopore center produce resonance (antiresonance) in the profile of the transmission coeficient difference between nanodevice with and without molecule at the nanopore center. These resonances (antiresonances) are due to the coupling of the molecule discrete states and the continuum states of nanodevice also called as t...