Emily Adlam

speaker

1,263 appearances 3 recordings 1 series first heard Apr 2025 last heard 20 Jul

Emily Adlam’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 · Emily Adlam: Reality Is a Completed Puzzle, Not a Flowing River · 11 Apr 2025 podcast

Yeah, so perhaps the I guess the traditional way of thinking about uh non-locality in quantum mechanics is to imagine it as a s a spatial form of non-locality.

So that involves a situation in which uh perhaps Alice performs a measurement in one location, and as soon as she does that, the wave function uh collapses everywhere in the world, and that sort of conveys information across to Bob wherever he is, and that uh has

has an impact on the result of his subsequent measurement.

So that non-locality is spatial because the effect of Alice's what Alice does is just transferred to the whole global state everywhere at the same time.

Whereas temporal non-locality uh suggests that uh non-locality doesn't necessarily have to be uh conveyed uh d uh immediately in terms of the current state of the world.

You can potentially think of non-locality as kind of hopping across time as well.

So uh Alice performs her measurement uh at some time, and at some other place and at some later time, Bob performs a measurement, and there's just a direct uh relationship.

There's some kind of constraint requiring that Bob's outcome uh reflects Alice's choice in some way.

So there's a kind of d direct non local impact that is not uh uh mediated by a global state of all Link Ford carrying that information.

Yes, so I think combining spatial non-locality with uh relativistic constraints makes it very compelling to think that there should be temporal non-locality.

Uh, that's because if you take a a frame of reference uh within relativity a relativistic setting where you have a spatially non-local effect, something Alice does, influences something that happens over here, uh, you're allowed within relativity to make a change of reference.

frame to get another equally valid reference frame.

And in that reference frame, those events are not going to be at the same time anymore.

The event, Bob's event over here, is going to be either in the future or the past of Alice's observation.

So it looks like by making that transformation you have turned your spatial non-locality into temporal non-locality.

So that in that sense, if you sort of if you believe what relativity tells us about the close connections between space and time.

It seems very hard to maintain that non locality is always spatial and never temporal.

Yeah, well I think one main reason for this is because uh quantum mechanics historically and still usually today is formulated as a time evolution theory.

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