Exotic matter
There are several proposed types of exotic matter:
- Hypothetical particlesand states of matter that have not yet been encountered, but whose properties would be within the realm of mainstream physics if found to exist.
- Several particles whose existence has been experimentally confirmed that are conjectured to be exotic hadrons and within the Standard Model.
- photonic matter, and time crystalbut whose properties are entirely within the realm of mainstream physics.
- Forms of matter that are poorly understood, such as dark matter and mirror matter.
- Ordinary matter that when placed under high pressure, may result in dramatic changes in its physical or chemical properties.
- Degenerate matter
- Exotic atoms
Negative mass
Negative mass would possess some strange properties, such as accelerating in the direction opposite of applied
Complex mass
A hypothetical particle with complex rest mass would always travel faster than the speed of light. Such particles are called tachyons. There is no confirmed existence of tachyons.
If the rest mass is complex this implies that the denominator is complex because the total energy is observable and thus must be real. Therefore, the quantity under the square root must be negative, which can only happen if v is greater than c. As noted by Gregory Benford et al., special relativity implies that tachyons, if they existed, could be used to communicate backwards in time[1] (see tachyonic antitelephone). Because time travel is considered to be non-physical, tachyons are believed by physicists either not to exist, or else to be incapable of interacting with normal matter.
In quantum field theory, complex mass would induce tachyon condensation.
Materials at high pressure
At high pressure, materials such as sodium chloride (NaCl) in the presence of an excess of either chlorine or sodium were transformed into compounds "forbidden" by classical chemistry, such as Na
3Cl and NaCl
3. Quantum mechanical calculations predict the possibility of other compounds, such as NaCl
7, Na
3Cl
2 and Na
2Cl. The materials are thermodynamically stable at high pressures. Such compounds may exist in natural environments that exist at high pressure, such as the deep ocean or inside planetary cores. The materials have potentially useful properties. For instance, Na
3Cl is a two-dimensional metal, made of layers of pure sodium and salt that can conduct electricity. The salt layers act as insulators while the sodium layers act as conductors.[2][3]
See also
- Antimatter – Material composed of antiparticles of the corresponding particles of ordinary matter
- Dark energy – Energy driving the accelerated expansion of the universe
- Dark matter – Hypothetical form of matter that interacts with gravity, but not with light or electromagnetic field
- Gravitational interaction of antimatter – Theory of gravity on antimatter
- Mirror matter – Hypothetical counterpart to ordinary matter
- Negative energy – Concept in physics
- Negative mass – Concept in physical models
- QCD matter – Hypothetical phases of matter
- Strange matter – Degenerate matter made from strange quarks
References
- .
- ^ "Scientists turn table salt into forbidden compounds that violate textbook rules". Gizmag.com. 21 January 2014. Archived from the original on 22 January 2014. Retrieved 21 January 2014.
- S2CID 15298372.
External links
- Exotic Matter and Negative Energy on YouTube
- The Riddle of AntiMatter on YouTube