But does time flow forward or can it go back too? In macroscopic physics, which is the one in which we live, the direction of time is one (it is also called the arrow of the time), and you cannot go back. Moreover, it is not even clear what exactly the time is for us (what we have experienced, which we remember, what we will live, which is only an idea, the present, which as soon as you think it has already passed, as Sant Agostino said). However almost every day news comes out that refer to studies with striking titles on the possibility of going back in time. Too bad they only concern particles. The last one was conducted by the team of researchers from the University of Surrey (there is also an Italian, Andrea Rocco) and published in Nature Scientific Report. Since, although I am very interested in science, I am a writer and not a physicist, I decided to ask our more authoritative physique, Roberto Battiston(of which I recommend seeing his conferences that you find on YouTube).
So, Roberto, who for particles can time go to both directions, past and future, is it new?
“On a microscopic level, where quantum mechanics dominated, the equations that determine the behavior of the particles can be read with the time that proceeds towards the future or towards the past. Even, as Feynman said, the antimatter particles, or antiparticles, are equivalent to particles that go back in time”.
I always find that a confusion is made between what happens at the subatomic level and what we live in, as biological organisms.
“It is probably all linked to the second principle of thermodynamics which states that, every complex system inevitably evolves within its environment towards an increase in disorder. If we want this is the arrow of time, complex systems, as living organisms tend to age, to lose consistency, to decay”.
What do you think of this study? It is a cognitive starting point on quantum physics, but why do many make it a metaphysics? An electron can enter two slits simultaneously, but you try a person to pass between two doors …
“Semper Feynman says that those who claim to understand quantum mechanics actually mind, precisely because it is profoundly anti -environmental. But at the same time it is the theory that we have verified countless times: each atom exists and is stable thanks to the quantum paradoxes”.
We can say
What, as far as we are concerned, does not exist?
“Well maybe it is rather the opposite, for us it exists, all right, for particles it is probably a parameter that can be exchanged of a mark with great ease”.