No big bang? Universe had no beginning

[Levina]

I have religion,just found a site,answered some of my questions.

Lil bro, I'll talk to you on this 5 years later.

 

[WAJsal]

Lil bro, I'll talk to you on this 5 years later.

I was expecting something like this.You know at the end of the day,when your questions are unanswered,you have only 1 option left(you know what).Plus i was not kidding(if you took it like a joke ).

 

[Levina]

I was expecting something like this.You know at the end of the day,when your questions are unanswered,you have only 1 option left(you know what).Plus i was not kidding(if you took it like a joke ).

I am also not joking.

 

[WAJsal]

I am also not joking.

Cool,have a nice day.

 

[Aarush]

well the proposed theory doesn't make the singularity wrong...but its may be improvised version of already existing theory.

"Using the quantum-corrected Raychaudhuri equation, Ali and Das derived quantum-corrected Friedmann equations, which describe the expansion and evolution of universe (including the Big Bang) within the context of general relativity. Although it's not a true theory of quantum gravity, the model does contain elements from both quantum theory and general relativity. "

the whole model is based on the Bohmian trajectories and its validation....if it is true then theory perhaps true.....
just an another possible explanation if other parameters are good....

What happened before singularity, can anyone predict?

in general theory all physics laws are invalidate at singularity so no one can predict about the time before it..

 

[Koovie]

This is just a theory right?

A scientific theory is NOT what you call theory in everyday life... you are mixing up theory and hypothesis. A theory is a hypothesis that has been confirmed in some way (e.g. through experiments).

 

[xyxmt]

Still waiting for that new research that declares smoking good for your heart. It will happen in my life time
how much should we trust these grant hungry scientists.

 

[Imtiaz_Sarwar]

A very interesting thread. So far gravitons have not been discovered. I look forward to the day when they will be discovered.

 

[Skull and Bones]

Still waiting for that new research that declares smoking good for your heart. It will happen in my life time
how much should we trust these grant hungry scientists.

Trust in a mullah, he will show you path to salvation.

 

[definitelynotIndian]

useless paper. Lies every where. How can a Universe without singularities even exist? IMPOSSIBRU

 

[SvenSvensonov]

useless paper. Lies every where. How can a Universe without singularities even exist? IMPOSSIBRU

Different theories, none proven, none more right than any other if supported well enough. Here's the no singularity theory of the universe.

NO-BOUNDARY UNIVERSE


A universe that is finite in size but did not begin with a singularity is the result of one attempt to combine aspects of general relativity and quantum mechanics. The history of this no-boundary universe in imaginary time is like the surface of Earth, with the Big Bang equivalent to Earth’s North Pole and the size of the universe increasing with imaginary time as you head south toward the equator.

A proposal first advanced by Stephen Hawking and Jim Hartle, the no-boundary universe is one in which the universe does not start with a singularity. It uses American physicist Richard Feynman’s proposal to treat quantum mechanics as a “sum over histories,” meaning that a particle does not have one history in space-time but instead follows every possible path to reach its current state. By summing these histories—a difficult process that must be done by treating time as imaginary—you can find the probability that the particle passes through a particular point.

Hawking and Hartle then wedded this idea to general relativity’s view that gravity is just a consequence of curved space-time. Under classical general relativity, the universe either has to be infinitely old or had to have started at a singularity. But Hawking and Hartle’s proposal raises a third possibility—that the universe is finite but had no initial singularity to produce a boundary (thus the name).

The geometry of the no-boundary universe would be similar to the geometry of the surface of a sphere, except it would have four dimensions instead of two. You can travel completely around Earth’s surface, for instance, without ever running into an edge. In this analogy, unfolding in imaginary time, Earth’s North Pole represents the Big Bang, marking the start of the universe. (But just as the North Pole is not a singularity, neither is the Big Bang).

Hartle-Hawking Universe Model

The No-Boundary Proposal - How Stephen Hawking Works

 

[definitelynotIndian]

@SvenSvensonov so what ever I learnt in school is invalid? First Pluto isn't a planet and now this? I am not happy :/

 

[Levina]

@SvenSvensonov so what ever I learnt in school is invalid? First Pluto isn't a planet and now this? I am not happy :/

I'm sure a lot of ppl were not happy when they came to know that earth is not flat.

 

[definitelynotIndian]

I'm sure a lot of ppl were not happy when they came to know that earth is not flat.

They executed the guy who said Earth isnt flat. For bringing this horrible news I must execute you. Any last wish?

 

[Levina]

They executed the guy who said Earth isnt flat. For bringing this horrible news I must execute you. Any last wish?

Yes, let me finish 2 tonnes of chocolate and then you can kill me.