Questions tagged [exotic-matter]

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Casimir Effect Analogue

The Casimir effect from what I understand is computed as the integral over a macroscopic object (e.g. a pair of conducting metal plates) of an essentially quantum phenomenon, namely the energy of the ...
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2answers
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Did researchers discover a new type of matter inside neutron stars?

I just read the University of Helsinki press release Researchers discover a new type of matter inside neutron stars on phys.org. It states that a Finnish research group has found strong evidence for ...
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Producing negative mass in a realistic way

The Casimir effect produces a region of negative energy between two plates. Is it possible, at least theoretically and ignoring the practical consequences of the enormous force that implies, to ...
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17 views

Thought Experiment - Gravitation, gravitational lensing, and negative mass matter

Suppose you had a giant mass of some exotic form of matter that has a negative mass. How would that mass behave with respect to gravity? What would a sufficiently large clump of this matter do to ...
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What do we know about the features of Dark Matter? [closed]

In 2020, how much information have we got about this matter? I'm just curious.
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Alcubierre drive: what is the nature of exotic matter? [closed]

In connection with Alcubierre drive we often hear about necessity of an exotic matter in order to produce a negative energy density. I suspect that such matter has no place in standard particle model. ...
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Travel Times in Various Metrics of Traversable Wormhole; A Requested Explanation

I understand Wormholes are theoretical, however, there are many, many articles written in relation to wormhole metrics and their associated qualities. 1) I have read the original MT-Wormhole paper ...
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1answer
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In regards to the hypothetical Alcubierre Drive (hear me out), are energy costs consumed immediately, or during transit?

I am aware the Alcubierre Drive is highly hypothetical and likely cannot exist. However, there are significant quantities of research material into Warp Drives of many types, and presumably the answer ...
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What if black holes consumed exotic matter? [closed]

I've just watched Kurzgesagt in a Nutshell and I've been thinking of exotic matter for a while. What if black holes tried to consume exotic matter?
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What is the adiabatic index of stiff matter?

In relativity, "stiff matter" is described by the relation $p = \rho$, where $p$ is the fluid's pressure and $\rho$ is its total energy density. The sound velocity in stiff matter equals the velocity ...
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1answer
78 views

Physical meaning of the instability of NEC violating material

Stephen Hsu and Roman V. Buniy published a paper in which they demonstrated that, for a large class of different models, any materials or fields that violated the Null Energy Condition would be "...
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Can one show that hypernuclei are always unstable?

Normal atomic nuclei are composed of protons and neutrons, where the local interactions stabilize the neutrons that are unstable in isolation. Hypernuclei have one or more strange hadrons beside the ...
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Minimum Amount of Negative Energy required in Warp Drive Spacetimes

In the pioneering work of Alcubierre, to power a warp drive-like geometry it is necessary to employ an amount of negative energy larger (in absolute value) than the whole observable universe mass. A ...
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If negative mass should exist, how would conservation of momentum work?

Imagine that a particle with negative mass has been discovered. It is known to obey both the equivalence principle and Newton's second law. This means that the particle is a subject to repulsive ...
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1answer
363 views

Are white holes made of exotic matter

I have recently watched Kurzgesagt in a Nutshell's video on Wormholes https://www.youtube.com/watch?v=9P6rdqiybaw and I have been thinking about white holes, and exotic matter. As I understand, white ...
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What elements would be created by bombarding quark matter with neutrons?

Assuming we managed to find or create either Strange Quark Matter or UpDown Quark Matter, I've read the suggestion that it would be stable, but that bombarding it with neutrons would cause it to break ...
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169 views

Has experimental search for free fractional electric charge elementary particles been put to an end?

Since Quantum Chromo-Dynamics theory has been supposed to explain quarks confinement, has experimental search for free fractional electric charge elementary particles been put to an end? If not, what ...
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2answers
104 views

Can nuclei ever “liquify”?

I've been reading about degenerate matter and how extreme temperatures and pressures can impact the way it organizes itself. Plasma is a type of matter where the energy of the matter allows electrons ...
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225 views

What is the difference between a deuterium nucleus and a sexaquark?

Assume a sexaquark contains 3 up and 3 down quarks. What is the difference between this and a deuterium nucleus containing a proton bound to a neutron? Is there any difference?
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Can the three dimensional analogue of a cross cap exist without exotic matter?

Let us topologically construct the 3D analogue of a Cross-cap. What we start with 3D euclidean space, and then remove a solid torus. This torus will have an axis of symmetry. We glue each point on the ...
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Can the mouths of a worm-hole be torus shaped?

Theoretically, most wormholes should have spherical mouths (if they exist). Could have a wormhole have torus-shaped mouths? What about other shapes?
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Theoretical basis for wormholes [duplicate]

From what little I know about general relativity, energy (and equivalently mass) distorts and curves spacetime due to the Einstien Field Equations. I also know "wormholes" are theoretically solutions ...
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2answers
292 views

Would a Cavorite-like material violate any conservation laws?

This post addresses a similar question, but rather than using gravitons as a means of propulsion, my question addresses the blocking of gravitational fields using a hypothetical passive material such ...
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1answer
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Exotic Matter: Stabilizing Wormholes

Background I know wormholes are still hypothetical but this is pertaining to exotic matter and it's effect on wormholes. Reading through various sources, they all specify that if wormholes exist, ...
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Negative mass, or just the 'appearance' of negative mass? What's the acid test?

Breaking news here claim researchers at Washington State University have created negative mass by the characteristic that if you push it, it accelerates in the opposite direction. The so called ...
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1answer
125 views

Obtaining exotic matter (formula) in the process of computer simulation

It is theoretically be possible to obtain exotic matter on the basis of ordinary matter? Assume that we have infinite computational resources. Is there a way to simulate the process of obtaining ...
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188 views

How do time crystals not contradict thermodynamics?

Given that one of the basic properties of time crystals is that they move without any energy being applied, does that not mean that it's producing more energy than it's receiving? How does that not ...
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Appearance of room-temperature strange matter

Assuming strange matter is stable at zero pressure, how might a chunk of room-temperature strange matter look? Assume it's in a zero-gravity vacuum. Would it be transparent or opaque? Would it appear ...
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2answers
189 views

What is the name of matter with $w = - \frac{1}{3}$?

What kind of "matter" is described by the following thermodynamic relation ? \begin{equation}\tag{1} p = -\, \frac{1}{3} \; \rho, \end{equation} Where $p$ and $\rho$ are the pressure and density ...
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1answer
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If all matter expanded [closed]

I know this is impossible (?), but what would happen if the electron orbit swelled, the gluons extended, and quarks lost density in relation to the gluons, would that affect the universe as we know it?...
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250 views

Why is there no negative mass? [duplicate]

We know that the entire matter has a property called mass. Charge is also a property of matter. If negative charge can exist, why don't negative mass exist? Also, like charges repel each other. Then ...
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How likely is negative energy to exist?

Negative Energy is the exact opposite of ordinary energy as it would move in the opposite direction from its momentum and accelerate in the opposite direction of an applied force. It would also warp ...
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1answer
2k views

What are negative and positive energies? [closed]

So I have a few questions related to the negative and positive energy topic. 1)What do we mean by negative and positive energies in physics? 2)I have seen in a minute physics video that we need ...
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1answer
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Are quantum “virtual negative-energy particles” the same as “negative energy density” in EFEs?

Question is fairly straightforward. Quantum theory describes negative energy in the form of the Casimir effect and virtual negative energy particles. In the Einstein field equations, negative energy ...
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Can we find exotic energy from outer space which is several times powerful than nuclear energy?If antimatter how? [closed]

Some thing Like we see in sci fi films
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3answers
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Dark Energy and Wormhole stability

Is it possible that the "negative energy" needed to create stable wormholes as theorized by Morris and Thorne (?) could be dark energy? Could this be the "exotic" negative energy matter referred to?
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116 views

How stable is a tablespoon of neutrons once removed from a neutron star? [duplicate]

I've often heard public lectures describing the degenerate, exotic matter left behind after a star collapses but fails to go supernova; one that has found its way to become a neutron star. The speaker ...
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1answer
268 views

Travelling through a worm hole

In every documentary I've seen about worm holes, I have noticed that they usually say that according to the General Theory of Relativity, there could exist worm holes called traversable wormholes; ...
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2answers
263 views

Exotic matter out of a “squeezed” vacuum?

In the light of the current warp field experiments by NASA I found this paper: http://arxiv.org/pdf/1005.5682v1.pdf Could this actually lead to the creation of exotic matter or at least strengthen ...
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Motivation for Negative Mass

Lately I've been reading a little bit (mostly here and on Wikipedia) about exotic matter, particularly matter with a negative mass. This question appears to be the original question on the site of the ...
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Calculating the mass of a wormhole

What would for an observer be the mass of an isolated wormhole (meaning that there is no gas and no mass of stars around it) if the wormhole mouth opposite to the observer reflects the light of a ...
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4answers
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How would the Casimir effect stabilize wormholes?

According to various sources, the Casimir effect could theoretically be used to stabilize a two-way wormhole because it "simulates" the negative energy exotic matter that would normally be required. ...
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3answers
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Conservation of potential energy for a wormhole

So you managed to build a stable traversable wormhole. Somehow you managed to acquire the exotic negative-tension materials with sufficient densities to make it all work. Now you place opening A of ...
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Wormholes with event horizons?

Under General Relativity, Lorentzian wormholes (the kind that are traversable) require exotic matter (a kind of unobtainium which is not known to exist). On the other hand, we know black holes exists ...
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Building a wormhole

We regularly get questions about wormholes on this site. See for example Negative Energy and Wormholes and How would you connect a destination to a wormhole from your starting point to travel through ...
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Wormhole traversability in general relativity

It is well known that stable, traversable wormholes require exotic matter that violate the dominant energy conditions. For the purpose of the question, let's assume enough exotic matter can be ...
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4answers
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What is negative Energy/Exotic Energy?

So I have been researching around a little as I am highly interested in Astrophysics and I came across an energy I have never heard of before; negative energy also commonly known as exotic energy. Now ...
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Negative Energy and Wormholes

Apparently to create wormholes you need negative energy/matter. Say you had negative matter/energy, how would it be applied towards making a wormhole?
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Does matter with negative mass exist?

Or does it exist mathematically? Is it really inconsistent with a common-sense, mathematics or known physical laws? As far as I understand, if it exists, it must be far away from the "positive" ...
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1answer
3k views

Exotic Matter — What is it?

I have a conceptual understanding of some theoretical physics concepts, so without getting into the math, what is exotic matter? I have read some articles that say it is anything not normal, while ...