Big Crunch or Big Rip?

[dipayankar]

Okay something that has been bugging me for a long time. In a hypothetical big rip scenario. When every molecule or atom has been destroyed, is it possible that some photons will also be destroyed in this process?

The different directions of spacetime. These directions are locally invariance but globally their group symmetry is spontaneously broken creating mass from energy which is just square root of square of energy.

[AntonioLao]

is it possible that some photons will also be destroyed

According to QED, quantum electrodynamics, culminated in the works of Feynman, Dyson, Schwinger, and Tomonaga, three of them received the Nobel Prize, photons are continuously being destroyed and created in the quantum vacuum of spacetime. The products are properly called virtual particles.

[austintorn@aol.com]

Okay something that has been bugging me for a long time…

Use sunscreen to diminish the effect of those pesky photons.

[dipayankar]

Okay rephrasing my query, can Big Rip destroy space time and hence energy?

According to QED, quantum electrodynamics, culminated in the works of Feynman, Dyson, Schwinger, and Tomonaga, three of them received the Nobel Prize, photons are continuously being destroyed and created in the quantum vacuum of spacetime. The products are properly called virtual particles.

[AntonioLao]

Energy can be destroyed and mass created vice versa. However, spacetime as square of energy cannot. Note that square of energy is a topology and only equivalent topologies (the same genus) can transform within themselves. A rip of spacetime is the same as changing its topology or genus.

[dipayankar]

Can this genus have null value?

Energy can be destroyed and mass created vice versa. However, spacetime as square of energy cannot. Note that square of energy is a topology and only equivalent topologies (the same genus) can transform within themselves. A rip of spacetime is the same as changing its topology or genus.

[Max™]

To give this question a better answer, one has to consider the state outside of a spacetime.

What does it mean for distance and duration to lose their defined and ordered states?

[dipayankar]

This thread has reached its end of life... How does it really mattert o intelligent life how the Universe ends. In all probability all the intelligent life will be wiped off long before the time the Universe ends. We need to know probably in the next 20000 years how the Universe will behave.

[Profpat]

Energy can be destroyed and mass created vice versa. However, spacetime as square of energy cannot. Note that square of energy is a topology and only equivalent topologies (the same genus) can transform within themselves. A rip of spacetime is the same as changing its topology or genus.

Hi Antonio;

Is spacetime a square of energy or a cube or sphere of energy?

I think the latest theory Dipayankar has a cold and lonely end to the universe, no crunch or rip, just endless expansion.

Best,

Pat

[AntonioLao]

Can this genus have null value?

A genus zero is equivalent to the topology of a sphere in any given dimension see http://mathworld.wolfram.com/Genus.html. Theoretically, the genus of quantum spacetime is 2 while the genus of spacetime continuum is 1.

Is spacetime a square of energy or a cube or sphere of energy?

The quantum of spacetime is square of energy but the spacetime continuum is simply the product of lightspeed and energy, S=cE. The latter is a global picture of spacetime, the former is a local picture of spacetime. The expansion is forever if and only if all directional invariance of spacetime points outward. This is impossible topologically but what is possible is the one dimensional local infinitesimal motion of Hopf link. Therefore, quantum spacetime cannot be a closed spherical surface.