David Wallace

speaker

1,940 appearances 2 recordings 1 series first heard May 2025 last heard 20 Jul

David Wallace’s voice in public audio — every appearance, attributed to the second.

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Recordings per month over the last 12 months — 1 in all, peaking in Jul 2026 with 1.

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Theories of Everything with Curt Jaimungal · David Wallace: Why Many Worlds Is the Only Consistent Interpretation · 29 May 2025 podcast

Was that a measurement of spin, or was it a measure of position?

Well, it's the same physical process, whether I decide to regard it as a measurement of spin or a g measurement of position, it's just a convention of my um um um

my part.

Uh and so

there's a necessary connection between the selfsame physics being described by those two

um different choices of projectures that put some constraints on how

um how you want to assign probabilities across them.

Yeah, no, it's a good question.

So what can we say objectively about the world according to Everettan quantum mechanics?

Um it contains a whole bunch of stuff with weird quantum properties, but because of the way the dynamical interactions between the stuff happens, then on a coarse grained description, the system evol you know, the c the collective degrees of freedom of that's of of of the stuff

evolve so as to have the same formal structure.

As a stochastic dynamical process.

And in terms of what's the physical goings-on that's being represented, it's basically a whole bunch of parallel goings-on.

There's no interference between the various different ways, for instance, structure forms in the early universe.

I have a superposition of all the ways structural form in the early universe.

I have a measure over those ways given by the mod squared amplitudes.

Uh and um

uh those different ways don't interfere with each other.

So that measure

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