Neil Turok
speaker
2,693 appearances
2 recordings
1 series
first heard Apr 2025
last heard 22 Jun
Neil Turok’s voice in public audio — every appearance, attributed to the second.
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recordings per month · last 12 monthsRecordings per month over the last 12 months — 1 in all, peaking in Jun 2026 with 1.
Appearances
What happened at the Big Bang?
What goes on in black holes?
These kind of questions have not been solved by these very complex frameworks for quantum gravity.
I used to believe it, that quantizing gravity required extra dimensions, strings, membranes.
What are the assumptions that go into this theory?
One of them is that the theory lives in a Hilbert space.
We have an example of a theory which doesn't require that assumption,
States of negative norm are called ghosts.
A state with negative norm corresponds to a negative probability.
That's just not true.
You can't observe the norm of a quantum state.
Provided the S-matrix or Hamiltonian of this theory has this symmetry, the answers you get are always positive, and the probabilities always add up to one.
We claim we understand quantum gravity in a certain limit,
The trick we used to make sense of it may or may not apply to the full thing.
Sam says, I think I know how it works.
And all it took is a slight tweak of the Born Rule.
Okay.
So, I used to believe it, that quantizing gravity was this...
required this huge amount of extra paraphernalia, extra dimensions, strings, membranes.
The whole story has become more and more complex as time progressed without actually solving any real problem.
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