Do wormholes require negative matter?
The hitch is that no one has the remotest idea how to make exotic matter. Six years ago, Visser and his colleague David Hochberg showed that in order to stay open, wormholes need exotic matter. It’s weird stuff, however – it can be considered to have negative energy, meaning that it has even less than empty space.
Why do wormholes need negative energy?
The catch is that traversable wormholes require negative energy. Because negative energy is gravitationally repulsive, it would prevent the wormhole from collapsing. For a wormhole to be traversable, it ought to (at bare min- imum) allow signals, in the form of light rays, to pass through it.
What if the mass is negative?
Washington State University physicists have created a fluid with negative mass, which is exactly what it sounds like. Push it, and unlike every physical object in the world we know, it doesn’t accelerate in the direction it was pushed. “With negative mass, if you push something, it accelerates toward you.”
Could a black hole be a wormhole?
Some black holes could be wormholes, and the difference is in the gamma radiation. Luminous, supermassive black holes called active galactic nuclei (AGN) could really be wormholes. The two cosmic objects emit totally different radiation signatures.
Is it possible to survive a wormhole?
Moving faster than the speed of light might be one way to traverse the universe within a single human lifespan, but we might be able to do it in a single second — traversing unfathomable distances at once through a physical wormhole. …
Is negative mass real?
In theoretical physics, negative mass is a type of exotic matter whose mass is of opposite sign to the mass of normal matter, e.g. −1 kg. Currently, the closest known real representative of such exotic matter is a region of negative pressure density produced by the Casimir effect. …
Is a black hole negative mass?
The resultant exterior black hole spacetimes necessarily have negative mass and non-trivial topology. A full theory of quantum gravity, in which topology-changing processes take place, could give rise to such spacetimes.
Why does antimatter have positive mass?
Antimatter is a physical entity with positive mass that is identical to regular matter in every way except that the charge and some other properties are flipped. When an electron meets a positron, they annihilate each other and their combined mass is converted completely into energy in the form of gamma rays.
Why do you need negative energy for a wormhole?
Negative energy is needed to repel the gravity, to hold the wormhole open so that matter can continue through it and exit at the other end (otherwise the matter would “converge” inside the wormhole and not exit as the wormhole collapsed; gravity, say Ford and Roman, is a converging force).
Is it possible to have a wormhole that does not collapse?
In some hypotheses where general relativity is modified, it is possible to have a wormhole that does not collapse without having to resort to exotic matter. For example, this is possible with R^2 gravity, a form of f(R) gravity.
What kind of wormhole allows travel in both directions?
Lorentzian traversable wormholes would allow travel in both directions from one part of the universe to another part of that same universe very quickly or would allow travel from one universe to another.
Can a magnetic field be created by a wormhole?
Not only a magnetic field but also a gravitational field can be created by, say, a simple solenoid (Chown, 1996, “Planes, Trains, and Wormholes”). Such a field can draw some matter into it. Some physicists thus believe that a unified approach is needed for understanding both gravity and electricity.