Linked Questions
39 questions linked to/from Is anti-matter matter going backwards in time?
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How is relativity related to anti-particles? [duplicate]
I have heard that a positron is like an electron moving backward through time. Can someone elucidate this statement for me. I would like to hear a deeper explanation of what we believe anti-matter to ...
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Do particles travel backward and forward in time? [duplicate]
All these classical ideas are pointless and obsolete today, because in quantum mechanics, the particles are completely different objects, defined by quantum motion of fields, not by the location of ...
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Making sense of particles going backwards in time [duplicate]
Physicists sometimes talk about particles going backwards in time. Help me make sense of this. I thought things don't "go" in any particular direction in time. They just "are" ...
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Can interacting QFT be formulated in terms of the path integral or hamiltonian of a relativistic particle? [duplicate]
I read that free QFT need not be formulated in terms of fields. One can derive the same propagator as the path integral of the single free particle action $\int d{\tau} \eta _{\mu \nu} x^{•\mu}x^{•\nu}...
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Antiparticles travelling backward through time [duplicate]
Could someone please explain to me Feynman and Wheeler's theory of waves acting forward and backward in time?
I have read about their idea of an antiparticle behaving as a particle travelling ...
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antimatter moving back in time [duplicate]
This just blew my mind away! I was watching a video about imagining the fourth dimension and the narrator said that little line. Can some people elaborate on this. Also please keep it simple not ...
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Is time travel possible? Is it possible to go back in time?
I read somewhere that according to relativity, it is possible - involving black holes and other stuff - to jump into the past. Is it possible for anything to go back in time either continuously or by ...
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Is time travel impossible because it implies total energy in the universe is non-constant over time?
I have always argued with my friends regarding Time Travel that it is impossible. My argument has been that it will destroy the theory that all the energy in the universe is constant since when one ...
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Could the black hole in the center of the galaxy be a white hole?
In the center of the galaxy there is a strong radio source which we call Sagittarius A*. Based on the high speed and orbit of nearby stars we have calculated that something with the mass of more than ...
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If electrons were just positrons moving backwards in time, then shouldn't we see them coming out of black holes?
I have read this question (What would happen if I crossed the shell of a hollow black hole?):
In effect, the formerly spacelike direction inwards becomes timelike, and the singularity is in the ...
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Anti-matter as matter going backwards in time? (requesting further clarification upon a previous post)
I understand this question has already been asked here, however, I don't have enough reputation points to place a comment (I suppose that's the reason) on a specific answer to request a reference.
A ...
user34134
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Do particles and anti-particles attract each other?
Do particles and anti-particles attract each other?
From the very basic understanding that they are created out of nothing mutually and collide to annihilate each other seems to indicate this happens ...
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Only one electron?
If it is true that an electron can be anywhere in the cosmos at any given time, then is it even theoretically possible that there is only one electron, instead of multiple electrons in the cosmos? If ...
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Does Einstein’s original paper on relativity predict antiparticles and tachyons?
In Einstein’s original paper on relativity (pages refer to this copy) page 149 he gets an initial form of the now known as Lorentz transformation
$$\mathbf{x’}=\phi(v) \Lambda \mathbf{x} \tag{1}$$
(I ...
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Feynman-Stueckelberg interpretation
My question is related to the interpretation of antiparticles. According to the so called Feynman-Stueckelberg interpretation a negative energy solution of the Dirac equation corresponds to a positron ...
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