The tachyon tag has no wiki summary.
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Travelling faster than the speed of light
Let's say I fire a bus through space at the speed of light. If I'm inside the bus (sitting on the back seat) and I run up the aisle of the bus will I in fact be traveling faster than the speed of ...
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4answers
644 views
Spinning Tachyons
In all examples that I know, tachyons are described by scalar fields. I was wondering why you can't have a tachyon with spin 1. If this spinning tachyon were to condense to a vacuum, the vacuum ...
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3answers
315 views
Can something travel faster than light if it has always been travelling faster than light?
I know there are zillions of questions about faster than light travel, but please hear me out. According to special relativity, it is impossible to accelerate something to the speed of light. However, ...
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2answers
501 views
Tachyon and Photons
Is there a particle called "tachyons" that can travel faster than light? If so, would Einstein's relativity be wrong? According to Einstein no particle can travel faster than light.
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0answers
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Status of experimental searches for tachyons?
Now that the dust has settled on the 2011 superluminal neutrino debacle at OPERA, I'm interested in understanding the current status of experimental searches for neutrinos. Although the OPERA claim ...
5
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2answers
240 views
What if a faster-than-light particle is found?
What will be the consequence (severe ones) on laws of physics if a particle that travels faster than light is discovered?
I am looking for a more general answer so that a high school student would be ...
5
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2answers
292 views
Do other particles besides scalars admit tachyonic solutions?
Do other particles besides scalars admit tachyonic solutions? For example fermions or gauge-boson tachyons? The picture in my head is that a tachyonic scalar simply rolls off some unstable potential ...
5
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1answer
173 views
Tachyonic antitelephone vs messaging through a wormhole
From the wikipedia article on tachyons:
Most physicists think that faster-than-light particles cannot exist because they are not consistent with the known laws of physics.[3][5] If such particles ...
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2answers
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what is the kinematics of a particle with complex mass?
particles with real-mass have time-like kinematics ($ds^2 > 0$).
particles with zero-mass have light-like kinematics ($ds^2 = 0$).
particles with imaginary-mass have space-like kinematics ($ds^2 < ...
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3answers
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How does faster than light travel violate causality?
Let's say I have two planets that are one hundred thousand lightyears away from each other. I and my immortal friend on the other planet want to communicate, with a strong laser and a tachyon ...
3
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1answer
97 views
Why does unbroken supersymmetry imply the absence of tachyons?
Just a quick question, same as in the title. I'm trying to understand stable D-branes.
3
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2answers
97 views
Superluminal particles with causality
What kind of CLASSICAL theories would allow to true (non-apparent) superluminal particles (beyond speed of light, BSOL) agreeing with causality to exist? I mean, are causal superluminal classical ...
3
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1answer
58 views
Rate of spontaneous tachyon emission
It's not possible for an electron to emit or absorb a photon without the presence of a third particle such as an atomic nucleus; without the third particle, it's impossible for such a process to ...
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2answers
541 views
How could something have negative mass?
With all the theories on how Neutrinos apparently broke the light barrier, there was one theory someone told me of how neutrinos might have less than zero mass, but she didn't explain how this was ...
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1answer
55 views
Is conservation of statistics logically independent of spin?
If the number of fermions is $n$, we expect the quantity $(-1)^n$ to be conserved, i.e., $n$ never changes between even and odd. This is known as conservation of statistics. In the normal context of ...
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2answers
186 views
How exactly do superstrings reduce the number of dimensions in bosonic string theory from 26 to 10 and remove the tachyons?
In bosonic string theory, to obtain the photon as the first excited state, the ground state must have a negative mass (tachyon). By applying $1 + 2 + 3 + \cdots = -1/12$, it can be shown (in a ...
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4answers
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The speed of tachyons
The other day I was wondering: When a tachyon is coming towards you faster than the speed of light, will you see it before it hits you? Then I thought of course not, since the light waves aren't ...
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3answers
157 views
Is there absolute proof that an object cannot exceed the speed of light?
Have any known experiments ruled out travelling faster than the speed of light?
Or is this just a widely accepted theory?
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2answers
171 views
faster-than-c photons
As far as I know, according to quantum field theory, there are some photons that go faster than c, which is the speed of light in vacuum.
However, there seems to be a paper and a corresponding ...
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1answer
237 views
Could Dark Matter be a manifestation of tachyons tunnelling between black holes?
Among the many Dark Matter candidates, I wondered if there are any along the lines of the title.
The inner horizon of a black hole, with its mass inflation, and/or the high spacetime curvature, seems ...
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1answer
67 views
Learning about predicted interactions between black holes and tachyons
I'm a hobbyist reader/student looking for some reading material on the predicted effects of tachyons and black holes (or other ultra-high gravity wells). Are there any good links or references people ...
