Physics of Wormholes

Science fiction often has a wonderful story on how humans pass the stars at a very fast rate beyond the light. Huge interstellar civilization is maintained by the Starship fleet that fly from the world to the world in a few days or weeks. Unfortunately, the truth is not that great. A typical limit speed is the speed of light, or about 998 x 108 meters per second. It can not run faster than this constant. It takes about 4 years to reach the nearest star at any extreme speed, whatever spaceship.

This might seem like being taken far away, but scientists at the Department of Physics at Barcelona Autonomous University created a wormhole in the laboratory that connects the two points of the magnetic field. These wormholes are magnetic wormholes rather than spatiotemporal (gravitational) wormholes, but the idea of ​​making an invisible wormhole remains an important step in creating a time travel. Smithsonian said that simply "When another magnetic field passes through the wormhole, it seems to leave space only on the other side." Therefore, this large "demerit" is that these wormholes do not infect people. Or particles, but the ability to manipulate the basic physical forces makes it possible to manipulate time and space.

Another concept of FTL travel is the concept of wormhole. The wormhole can be connected not only to two places in the space but also in time, so it can be strange. The idea here is that the things involved do not move faster than the light and the large distance (or time) to pass is only the result of the curvature of time itself. People can just enter the wormhole at the speed of walking, reach destinations that are thousands of light years away, or reach destinations that will last thousands of years. The wormhole needs a negative energy source. This is what physicists do not believe. There seems nothing in our understanding of the universe that can hinder the existence of negative energy, so we can not scientifically eliminate the artificial creation of the wormhole.

According to the current theory of the nature of wormholes, structures that can pass through wormholes often require the presence of substances with negative energy, called "foreign bodies". Technically, in the wormhole spacetime, the energy distribution needs to violate various energy conditions such as zero energy condition and weak, strong, dominant energy conditions. However, it is well known that quantum effects can lead to small measurable violations of zero energy conditions, and many physicists require the negative energy required by the Kashmir effect in quantum physics I believe it is possible. Although it was shown that a very large amount of negative energy is required in the initial calculation, it was shown that the amount of negative energy can arbitrarily be reduced in subsequent calculations.