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Our Universe as an Hologram

Our universe could be a hologram, gigantic and complicated. This is what emerged from a research conducted by an international team that took into account both the theoretical aspects of the physics of the primordial universe and the studies related to the fundamental structure of matter, thus created a model compatible with what is known of the nature of the cosmos.

The study of the group, which also includes Italian researchers Claudio Corianò (Lecce Section of INFN) and Luigi Delle Rose (University of Salento), has been published in the journal Physical Review Letters and could help us not only to better understand the origin of the cosmos and its mechanisms, but it could also reveal the way in which the space and time in which we live have been produced.

"The hypothesis that our universe functions as a huge and complex hologram was formulated in the 90s of the last century by several scientists, gathering theoretical evidence in various areas of the physics of fundamental interactions" - said Claudio Corianò, researcher of INFN and professor of theoretical physics at the University of Salento.

Lambda-CDM

The results of the research were then compared with the experimental satellite data on cosmic microwave background radiation (Cosmic Microwave Background, CMB) and were compatible. The current model of our universe, in a phase of acceleration through dark energy, foresees a "cosmological constant" (introduced by Albert Einstein in the 1920s) called Lambda. Being also involved in the cold dark matter (Cold Dark Matter, CDM), the model was called Lambda-CDM.

But can we explain a holographic universe?

We can imagine everything that is seen, heard and heard in 3D: both with the perception of time and the emanation of a two-dimensional flat field, where the third dimension emerges if we compare it to the other two dimensions. To better explain this concept we take into account the ordinary holograms, in which the three-dimensional image is encoded in a two-dimensional surface, as in the case of a credit card: in a hologram, the third dimension is generated dynamically starting from the information on the remaining ones two dimensions.

The word to the author

"To create a hologram, take a bright laser beam and separate it at the origin into two beams: one is sent to a distant object and then reflected, while the other is sent to be recorded. We need two coordinates to address the incident beam on the object, in order to explore it completely, while it is precisely the interference between the original beam and the reflected beam that allows us to reconstruct the image and give a sense of depth »- explains Corianò -« The idea behind the holographic theory of the universe is that all the information that constitutes the three-dimensional 'reality' - plus time - is contained within the confines of a reality with one dimension less ».

A good example is a 3D cinema: the result of two different images sent to the right eye and the left eye; scene is taken from two different angles, to be processed automatically by our brain that generates the sense of depth. The information comes from a flat screen but is perceived by the observer three-dimensionally. We can imagine the holographic universe as an ideal surface, on which all the information of the universe is recorded as in a hologram: in short, a screen that contains the "scene" of the entire universe.

Scientists now hope that their study can open the way to improve our understanding of the universe and explain how space and time are produced

Are we living in a simulation?