Is nothing an unstable thing that violates HUP?

SeventhSigma
Is "nothing" an unstable thing that violates HUP?

I am trying to understand the logic behind the likelihood of creatio ex nihilo.

Does QM tell us that it isn't possible for something to have position and velocity both be 0 at the same time, which is what "nothing" would suggest?

zje2009

Creatio ex nihilo is possible.Because of the uncertainty principle,or say E*t>h.But the time lasting would be very short,and there's no practical value.

Does QM tell us that it isn't possible for something to have position and velocity both be 0 at the same time, which is what "nothing" would suggest?
That's not nothing. Nothing means no objects and if you have no objects, you can't even define position and velocity.

In QM, the HUP usually leads to a groundstate with finite energy. In QFT, this leads to vacuum fluctuations which means that virtual particle-antiparticle pairs are created. There are different opinions about the question whether virtual particles should be considered "real" or a mere mathematical entity because they don't occur in all calculation methods.

However, QM and QFT tell us nothing about creatio ex nihilo because you need to have particles or fields in order for these effects to occur. And these are obviously not nothing.

g.lemaitre

That's not nothing. Nothing means no objects and if you have no objects, you can't even define position and velocity.

I agree with Kith. The OP needs to be more clear about what he means by nothing. The Greek philosopher Parmenides (the first philosopher for which we actually have something written down) said that nothing does not exist because to think of nothing is to cause something to exist since the very act of thinking causes existence. Nothing is something which, one, no one has ever thought of before, and two, does not occupy space and is not space itself.

When the OP refers to nothing he is probably referring to a quantum vacuum which is anything but nothing.

zje2009

I agree with Kith. The OP needs to be more clear about what he means by nothing. The Greek philosopher Parmenides (the first philosopher for which we actually have something written down) said that nothing does not exist because to think of nothing is to cause something to exist since the very act of thinking causes existence. Nothing is something which, one, no one has ever thought of before, and two, does not occupy space and is not space itself.

When the OP refers to nothing he is probably referring to a quantum vacuum which is anything but nothing.

Yes,this is a good explanation besides physics.

liuxiaof

Yes,this is a good explanation besides physics.
can you give out a good explanation besides physics.

SeventhSigma

Why is there something rather than nothing?

Staff Emeritus

Why is there something rather than nothing?

Because of CP violation.

Are we doing physics or philosophy here?

Zz.

SeventhSigma

Physics. I want to know the plausible physical answers to the question.

zzgl

Physics. I want to know the plausible physical answers to the question.

"Nothing" is no thing, and so cannot be described. Stable or unstable terms apply to things.

Physicists, like religionists and people in every human pursuit are intent on describing, measuring, and defining. "Nothing" defies these efforts.

Yet, every thing is surrounded by and interpenetrated by "nothing" in very large proportion.

Get quiet - stop your striving - and know "nothing" directly (which is what some folks here have pointed out I know). There is no other tool but your own consciousness for this. Once known, there can be no adequate description. It does become clear, however, who is searching... who is watching. Pay some attention to "nothing".

Staff Emeritus
2022 Award

This thread is careening down a slope of speculation from where there shall be no return.

audioloop

"Nothing" is no , and so cannot be described. Stable or unstable terms apply to things.

Physicists, like religionists and people in every pursuit are intent on describing, measuring, and defining. "Nothing" defies these efforts.

Yet, every is surrounded by and interpenetrated by "nothing" in very large proportion.

Get quiet - stop your striving - and know "nothing" directly (which is what some folks here have pointed out I know). There is no other tool but your own consciousness for this. Once known, there can be no adequate description. It does become clear, however, who is searching... who is watching. Pay some attention to "nothing".

... :uhh:

zzgl

Who can understand - 'stand under' - the 'ground of Being'?
"Nothing" is this ground.

While this thread is still open, let us explore the one unknown which words can never de_fine!
Einstein started on this path - did he not?!
Peer into the darkness!
Let there be an unknown!
Be enhanced by non-verbal knowing!

I bow now to the 'mentor' who will close this thread.

Nothing will yet be known!

Killtech

i think the problem with this question is the very vague terms of 'nothing' and 'something' that make it impossible to find a precise answer.

if parts of the probability density and probability current (that arises form the wave function) count as something then sure you can get both values to zero (though for the location of anything to be x=0 is really just choice of coordinates).

i think you can yield any answer you want by choosing an appropriate definition of 'something' and 'nothing'. that includes Parmenides self excluding understanding of nothing that does not exist per definitionem.

maybe try it the other way around: take the answer you want to have and then ask what definitions of 'no-/something' are compatible with it and what mathematical structures of the QM become existing objects.

personally i go along with Parmenides view because there isn't anything that has no properties of its own. everything has some no-trival structure and that includes the space. if you look into general relativity you know it's a hugely complex entity by itself even if its 'empty'. and looking at the QED or other field theories it tells you that the empty space is everything else then empty. the only thing i'd count as 'creatio ex nihilo' is perhaps the big bang but that is rather due to our 'nihilo' knowledge of what was before.

Why is there something rather than nothing?
phyisics focuses on explaining things based on the existence of some laws of physics. but it does not yield any explanation of why laws of physics exists and it never will. what physics does it always of the type "A => B" but never "=> A". so physics is certainly the wrong place to look at for insight into this question.

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Naty1

Why is there something rather than nothing?

see post #3.

But 'WHY' questions in physics usually have no fundamental 'rationale'...Maybe in a different universe things are different; here, we describe what we observe.

Mentor

Are we doing physics or philosophy here?

I still see no physics here, only vague philosophical or metaphysical musings. This thread is closed.