# D-branes as possible connection between different energy scales in the context of gravity

**RNDr. Richard Pinčák, PhD.**, theoretical physicist of the Institute of Experimental Physics SAS, in collaboration with colleagues from Italy, Denmark, Saudi Arabia and Canada has recently published in the renewed International Journal of Geometric Methods in Modern Physics Vol. 18, No. 14 (December 2021) a very important article in the field of cosmology „*A topological approach for emerging D-Branes and its implications for gravity*”.

Team consisting of three mathematicians and two theoretical physicists introduced and applied model of special geometric manifolds, the so-called PNDP-manifolds, to the gravity in a completely new way in the context of the emerging gravity and D-Branes model of the universe (see the image, where our observable universe appears as a point on Calabi-Yau manifold). The article assumes that at the fundamental level, D-brane can consist of “objects” (PNDP-manifolds) which emerge in points, i.e. with zero virtual dimension, which mutually interact. This work introduces and describes discrete origin of the gravity. This theory with discrete gravitational effects predicts that propagation of various wavelengths is slightly different due to fact, that higher energies are more sensitive to basic microscopic structure than wavelengths with lower energy. Almost any experiment sensitive enough to distinguish such discrete shifts of vector units in the particle system freely moving in the gravitational field would in principle be potential candidates for experimental tests. But it will be difficult because the size of the discrete “jump” will be extremely small, yet always closer to reality than dimensions of plank lengths, which is the prediction of string theory.

More information about the current issue written in more popular form can be found in Reccom Magazine, in the article entitled: “*New possible link between different energy scales in the context of gravity*“.