LOG#131. Spacetime foam(I).

Some weeks ago, I was studying some papers and talks by Jack Ng. I am going to share with you what I have learned from them, about the wonderful subject of the “quantum spacetime foam”. Some topics and ideas I … Continue reading

LOG#115. Bohr’s legacy (III).

Dedicated to Niels Bohr and his atomic model (1913-2013) 3rd part: From gravatoms to dark matter Gravatoms Imagine a proton an an electron were bound together in a hydrogen atom by gravitational forces and not by electric forces. We have … Continue reading

LOG#074. Dual units.

The last of my three posts tonight is a mysterious dual system of units developed my rival blog (in Spanish language mainly): http://tardigrados.wordpress.com/ His author launched an interesting but speculative dual system of units in which every physical quantity seems … Continue reading

LOG#073. The G2 system.

The second paper I am going to discuss today is this one: http://inspirehep.net/record/844954?ln=en In Note on the natural system of units, Sudarshan, Boya and Rivera introduce a new kind of “fundamental system of units”, that we could call G2 system  … Continue reading

LOG#072. The hG system.

Brazil is experimenting an increase of scientific production. Today, I am going to explain this brazilian paper http://arxiv.org/abs/0711.4276v2 concerning the number of fundamental constants. The Okun cube of fundamental constant, firstly introduced by Gamov, Ivanenko and Landau, has raised some … Continue reading

LOG#070. Natural Units.

Happy New Year 2013 to everyone and everywhere! Let me apologize, first of all, by my absence… I have been busy, trying to find my path and way in my field, and I am busy yet, but finally I could … Continue reading

LOG#057. Naturalness problems.

In this short blog post, I am going to list some of the greatest “naturalness” problems in Physics. It has nothing to do with some delicious natural dishes I like, but there is a natural beauty and sweetness related to … Continue reading

LOG#056. Gravitational alpha(s).

The topic today is to review a beautiful paper and to discuss its relevance for theoretical physics. The paper is: Comment on the cosmological constant and a gravitational alpha by R.J.Adler. You can read it here: http://arxiv.org/abs/1110.3358 One of the … Continue reading

LOG#046. The Cherenkov effect.

The Cherenkov effect/Cherenkov radiation, sometimes also called Vavilov-Cherenkov radiation, is our topic here in this post. In 1934, P.A. Cherenkov was a post graduate student of S.I.Vavilov. He was investigating the luminescence of uranyl salts under the incidence of gamma … Continue reading