This paper provides a novel approach to solving the transmission of electrons through large graphene nano-structures, which is shown to be accurate both at high and low speeds. The model for graphene being solved is the continuum model governed by an analogue to the Dirac equation. For a solution, the Dirac equation is scalarised using the Foldy-Wo...
Published in Physics Education
Special Relativity introduces students to Modern Physics, whose importance in the high school is increasing. Nevertheless its teaching and learning is a critical issue. Different solutions have been developed to overcome the encountered difficulties. In this paper we describe the spacetime globe, a mechanical instrument that allows to experience Sp...
Here we will consider a function of κ-statistics, the κ-Weibull distribution, and compare it to the well-known Weibull distribution. The κ-Weibull will be also compared to the 3-parameter extended Weibull function, obtained according to the Marshall–Olkin extended distributions. The log-logistic distribution will be considered for comparison too, s...
We all have in mind Einstein's famous thought experiment in the elevator where we observe the free fall of a body and then the trajectory of a light ray. Simply here, in addition to the qualitative aspect, we carry out the exact calculation. We consider a uniformly accelerated reference frame in rectilinear translation and we show that the trajecto...
Discrete mechanics postulates the conservation of acceleration; it establishes a law of conservation where the proper acceleration of the material medium or of the particle is equal to the sum of the accelerations which are applied to it. The abandonment of the mass of Newton's second law is not in contradiction with the principle of equivalence of...
The question about the relation between spacetime structure and the symmetries of laws has received renewed attention in a recent discussion about the status of Minkowski spacetime in Special Relativity. In that context we find two extreme positions (either spacetime explains symmetries of laws or vice-versa) and a general assumption about the deba...
In this work we present a simple introduction of the Special Relativity theory without for- mulae, suitable for being explained to high school students. Using this framework we are able to prove graphically the time dilation and length contraction. / En este trabajo presentamos una introducción a la Relatividad Especial sencilla y sin fór- mulas, a...
Quantum stretching is a technique to make quasi-copies of an arbitrary qubit without violating the No-Cloning Theorem. These quasi-copies of the original qubit contain all the information of the original but at the cost of duplication in its size each time the technique is applied. Basically, a stretched bit or subit is obtained applying a single, ...
Instantaneous teleportation-the transmission and reconstruction over arbitrary distances of an unknown state without any type of disambiguation based on classical bits-is demonstrated, supporting the fact that instantaneous information transfer via an Einstein-Podolsky-Rosen channel is definitely possible. In other words, quantum correlations can b...
