Aha development



Before the Big Bang 9: A Multiverse from "Nothing"

Did theuniverse have a beginning or has it always existed? Is there just one universe or many? In this series we explore competing models for what happened at or before the big bang. In this episode we interview Alex Vilenkin who proposed the universe had a spontaneous origin from “nothing" and with no cause! He also showed how our big bang would not be alone, that there would be an infinite number of big bangs generating a multiverse. The idea of a universe from nothing has of course been discussed elsewhere. But here we clear up many misunderstandings of the concept with the scientist who invented it. In particular, the proposal that the universe came from nothing is not to be confused with the proposal that the universe originated from a vacuum fluctuation. Below is lit of topics we discuss. Please note we did not release the film until Alex Vilenkin saw a draft and approved it. 00intro and Alex Vilenkin talk about his early life. 2:28 The uncertainty principle 3:16 Tryon’s proposal 5:32 Inflation 7:00 Quantum Tunneling 8:21 Tunnelling From Nothing 12:38 Difference between Tryon’s and Vilenkin’s proposal 13:45 Semi Classical Gravity 15:04 What caused the universe 16:05 Interpretation of QM and implications for cosmology 19:00 Why don’t tigers appear in our living room if things can come from nothing?21:07 how do we get a multiverse? 23:25 was inflation before or after the big bang? 25:12 Alan Guth’s reaction to Vielnkin’s multiverse proposal. 26:10 Experimental tests of the multiverse 28:17 Indirect test of the multiverse and fine tuning. 33:08 has a recent undermined the multiverse?36:46 experimental probe of tunnelling form nothing 37:42 geometry of the universe and tunnelling form nothing. 38:50 are the physical laws just description or are they are more than that? 39:24 way are the laws of physics the way they are?40:31 Boltzman Brain 42:15 The Hartle Hawking Proposal 43:21 Responding to Neil Turok and colleagues new critique44:50 BGV theorem 47:15 low entropy 47:41 Does anyone back the one big bang one era universe? 48:13 Does infinity exist in the real world?50:51 Where next for the proposal and early universe cosmology?

longhornfan8575

Wow how fun does this look lol awesome!

Jkg Lga

HOW DARE THAT BOYFRIEND SLSP THAT BABY SHE IS TOO YOUNG I THINK I NEED TO SLAP SLAP SLAP AND KICK AND KICK HIM AND MAYBE KILL HIM and I'll give a thousand dollars to that girl

Jordan. J

do until dawn easter eggs

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Divyanshu Sachan

The world needs to know who is the PANDA

Jokes on you I'm already dead inside

Nasir Hussain

Like if yo

●VLOG●

I one watch dp?

boweep TM

Kelpie is Ciri’s horse’s name in the Witcher books.

jgg3121332jgjg

the blue flash

My dumbself: omg she cut off her head?

(Thought I wo

Azhar Malik

Dude !!! U should make a part 3 for this

game _ice

That's wasting food

gubs

3:15 maybe is BIMO the gameboy from adventure time @funwithguru

Chronically Vlogging

The title means that her step mom is like her real mom not that her step mom was secretly her biological mom. People take things too literally. 🙄

Owen Modzelewski

Super bowl

Не кривые руки

Ну блин я не верю это чушь какая-то

Cyarrah

early maybe? nice art! 😊

pasta to cheese

Offende

I got 99 problems but a video ain't one

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