Time Travel: Einstein's big idea (Theory of Relativity)

[aZu]

[Yiannis]

Από τις πιο "όμορφες" εξηγήσεις για τη σχετικότητα του χωρο-χρόνου.

[joanna]

O Ronald Mallett καθηγητής φυσικής στο πανεπ.του Κονέκτικατ,σχεδιάζει να φτιάξει την πρώτη χρονομηχανή.

For quite some time, Ronald Mallett has been working on plans for a time machine. This machine uses a ring laser and the theory of relativity. Mallett first argued that the ring laser would produce a limited amount of frame-dragging which might be measured experimentally, saying:

In Einstein's general theory of relativity, both matter and energy can create a gravitational field. This means that the energy of a light beam can produce a gravitational field. My current research considers both the weak and strong gravitational fields produced by a single continuously circulating unidirectional beam of light. In the weak gravitational field of a unidirectional ring laser, it is predicted that a spinning neutral particle, when placed in the ring, is dragged around by the resulting gravitational field. [R. L. Mallett, "Weak gravitational field of the electromagnetic radiation in a ring laser", Phys. Lett. A 269, 214 (2000). pdf
In a later paper, he argued that at sufficient energies, the circulating laser might produce not just frame-dragging but also closed timelike curves, allowing time travel into the past:

For the strong gravitational field of a circulating cylinder of light, I have found new exact solutions of the Einstein field equations for the exterior and interior gravitational fields of the light cylinder. The exterior gravitational field is shown to contain closed timelike lines.
The presence of closed timelike lines indicates the possibility of time travel into the past. This creates the foundation for a time machine based on a circulating cylinder of light. [R. L. Mallett, "The gravitational field of a circulating light beam", Foundations of Physics 33, 1307 (2003)

Λέτε να τα καταφέρει?

[joanna]

Μ'αρέσει πώς εξηγεί την αντίληψη των διαστάσεων,πώς αντιλαμβάνονται πχ την τρίτη διάσταση σε δισδιάστατο επίπεδο (και υπάρχουν 10-11 σύμφωνα με τη θεωρία των χορδών).

[Constantine]

The doors to the past will be opened by a unique installation that is about to be done in Switzerland. The project, that is going to erase the boundaries between countries, costs 10 bln dollars.
The possibility to travel in the past is proved by Professor Nikolai Koziryov, who works in the observatory of Pulkovo (Saint - Petersburg). He found out that astronauts observe the light of one the same star from three points – from the past, present and future.
The first Russian “time machine” was constructed by the scientists of Moscow Aircraft University. “To keep the machine secret we marked it as a beaver-rat trap”.

To understand, how the machine impacts live creatures, Vadim Chernobrov, an experiment administrator, put cockroaches inside. The insects died. They modernized the machine and put mice inside. The effect on them was the same. Scientists realized what the cause of death was: on different parts of the body time ran with a different speed. They fixed the machine once again and put a puppy called “Lunar Rover” inside. He was inside for 108 minutes. The puppy survived, but behaved like he was having rabies.

Then experiments on people came. Nine scientists, among which was Chernobrov, took part in it. Instruments inside the machine recorded a 3 percent time shift, and changes in machine size. Experiment participants, however, felt nothing but moderate arrhythmia and colored circles in eyes.

‘We came to conclusion that time is 3–dimensional. So in fact we can move in time backwards and forwards”, - says Vadim Chernobrov.

While Russian scientists are just testing the machine, scientists of Switzerland are getting ready to make a true revolution in the world development. The question is: do we really need this revolution?

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