With the help of two younger colleagues, Boris Podolsky and Nathan Rosen, he formulated another even more striking thought experiment that shows the non-locality of quantum mechanics. This paper is now known as the EPR paper after its authors.
And minimizing for that score is how I identify a locality . A locality will be a relatively high-density population area surrounded by a more sparse area around it in a typical town, city arrangement. And that's all I'm optimizing for.
Thank God, it's weird, otherwise, like, why are we here? But locality is weirder. It's the uber weirdness.
- And that's showing, throwing no shade on their colleague who did these cool experiments. - While non-locality remains a controversial idea, a sizable portion of physicists do side with Aharonov.
In other words, quantum mechanics requires instant influences across distance. It violates locality . Einstein concluded his talk by saying this is an entirely peculiar mechanism of action at a distance, and that this implies to my mind a contradiction with the postulate of relativity.
- So we're forced to accept one of two explanations for this experiment. Either non-locality like the Copenhagen interpretation of quantum mechanics or a local hidden variable theory given that non-local action at a distance contradicts relativity. Einstein thought this was definitive proof that the Copenhagen interpretation of quantum mechanics is wrong, and therefore there must be some local hidden variable theory
Whenever they happen to be asked different questions, their answer needs to disagree about 25% of the time. of non-locality in nature - Before the first Bell test was done.
Whenever they happen to be asked different questions, their answer needs to disagree about 25% of the time. between giving up locality and giving up realism.
Whenever they happen to be asked different questions, their answer needs to disagree about 25% of the time. Start by assuming locality for the entangled particles.
Whenever they happen to be asked different questions, their answer needs to disagree about 25% of the time. And non-locality isn't the only troubling thing about quantum mechanics.
living in specific areas where the water's a little bit warmer because of geothermal activity, and has allowed them to essentially breed in that locality . Never before would it have been even remotely possible to know they exist, let alone to image each individual octopus and to count it as well.
physics was incomplete or that there was something going faster than light somehow. that the idea of locality itself would dissolve.
There is meteorites from Earth on Mars. We're not assigning locality to a second genesis.
So what we did is we just kind of did a shotgun approach to see what kind of vomeronasal receptor genes were present in lemurs, and particularly mouse lemurs. And you have their locality data.
So what we did is we just kind of did a shotgun approach to see what kind of vomeronasal receptor genes were present in lemurs, and particularly mouse lemurs. all the locality data for all these species.
And people talk a lot about God not playing dice with the universe and Einstein was very worried about the indeterminism or randomness of quantum theory. But non-locality is actually above that in his list of problems with the theory, or conundrums with the theory. It's actually the only thing he ever wrote a paper about, which indicates the level of concern that he had whereas randomness was just
And my book is kind of a meager attempt to do that, to give a naturalistic explanation for what seems, on the face of it, supernatural, this non-locality . And that explanation will come, as I'll elaborate on, in the form of a failure of space. Spacetime, more generally, but I really focus on space, this concept of space, which in any kind of basic physics is taken as this substrate, is taken as the fundamental stage
The xyz and the t, if you have time in there, coordinates, distances, sizes, everything we talk about in physics is spatial in some way or other. And non-locality seems to be undermining that, seems to be suggesting perhaps there's a deeper level that underlies space. At least that's the proposition that I'll put forward today.
What's the non in front of? And the word locality has, in physics and philosophy, different associated meanings. It's really kind of synonymous actually with spatial.
We're individuals. Science can partition the world. And so locality does seem to be an important characteristic of, at least, the observable world, the world that we inhabit in a daily life. But if you look more closely, or do special analysis of our current theories, you see this non-locality , and it comes out in different ways.
And you can see where those skeptics are coming from. I mean locality is a very successful principle. It's something we observe just from our senses.
But, to head off any questions, let me go into the crystal for a couple minutes because it is actually cool physics. Principle of locality is what's really explaining or kind of underpinning the irreversibility of black holes.
Einstein described a thought experiment that involved a box of photons and a mirror. Its purpose was to show the non-locality of the Copenhagen interpretation in action. - Bohr just misunderstood it, and when he recounted it to others later on, he drew a little diagram of
Whenever they happen to be asked different questions, their answer needs to disagree about 25% of the time. I don't know any conception of locality , which works with quantum mechanics.
you're building up food stocks in your home or your your your locality or your home or your your your locality or your country or your region. Um uh that country or your region. Um uh that you're diversifying your trade routes so you're diversifying your trade routes so that you don't all put all your eggs in
Really, I feel very fortunate. I've got a really lovely locality around me, and I went in, and one of the girls that worked there was like oh, I missed you today because I didn't see you this morning. And I said oh, that's really sweet.
physics was incomplete or that there was something going faster than light somehow. it was also doomed to have non-locality , spooky action at a distance, things influencing
And it operates in the 32 counties of the Republic of Ireland. It operates in every tiny locality throughout Ireland. A few years ago myself and some colleagues did a-- now, we know that it's very powerful in rural Ireland.
So what we did is we just kind of did a shotgun approach to see what kind of vomeronasal receptor genes were present in lemurs, and particularly mouse lemurs. So you measure that by the locality .
And then we'll get progressively more specific over the course of the talk. The basic idea of non-locality is you can have a connection between different things. Something here can be connected to something over there.
And they're the same response. That's the nature of this non-locality . The particles are remaining connected without a connector.
So let me again, continuing my tour of the subject, spiraling in on it. Let me dissect the idea of non-locality . And to do that, I need to tell you what locality is.
It's really kind of synonymous actually with spatial. When you see the word locality , you can almost substitute in your head spatial. The two ideas are closely related but locality is a bit more specific about what it means to be spatial and it has different meanings.
When you see the word locality , you can almost substitute in your head spatial. The two ideas are closely related but locality is a bit more specific about what it means to be spatial and it has different meanings. So meaning number one is things have locations.
So they might interact by actually moving through the space that separates them and banging into each other, called contact action. That's the original sense of locality going back to the ancient Greeks. Contact action where atoms would come together and hit.
It's the speed of, the maximal speed of interaction between objects in the universe. So this idea of non-locality and spaciality is really fundamental to our entire intellectual framework. It's not just about physics, it's all the natural sciences.
And you can break down any-- in theory, you can break down any process into that kind of step by step causal narrative and that is dependent on the fact that we have this idea of locality . It also has a methodological importance.
They're properties of a collective of the system. and that's a type of non-locality . You can't localize the property to any of the pieces.
The wave function is that's what makes quantum mechanics non-local. - The EPR paper didn't just point out this non-locality issue. They proved that there is only one local alternative theory for explaining this experiment in this local story.
Whenever they happen to be asked different questions, their answer needs to disagree about 25% of the time. Therefore, the assumption of locality must have been wrong.
and then measure the distance to all of those blocks and weight it by the population. And minimizing for that score is how I identify a locality . A locality will be a relatively high-density population area surrounded by a more sparse area around it in a typical town, city arrangement.
We have an immediate campus. One is for-- both are in the same locality , actually, and are adjacent to each other. One is for the girls.
So what we did is we just kind of did a shotgun approach to see what kind of vomeronasal receptor genes were present in lemurs, and particularly mouse lemurs. And then you estimate the climatic variables by locality .
Your whole sense of personhood would be violated. So your sense of personhood depends on this concept of locality , as well. So I just bring all this up really as a way to demonstrate the mystery, the depth of the mystery that non-locality
Not just the one Einstein originally worried about, about subatomic particles. There's also a lot of different kinds of locality having to do with black holes. That goes back to the work really of Stephen Hawking.
So black holes are going to be in the news a lot in the coming weeks, at least, if the rumors are correct. The workings of gravity also have a subtle form of non-locality in them, which is ironic because Einstein invented his theory of gravity, general relativity, to banish the Newtonian law on locality that had been there.
So in these different ways you get different violations of those principles I mentioned earlier of locality . So one example is in some of these forms of non-locality , the things at different places are not isolated from one another. You can actually affect this one and, boom, instantaneously affect the other one over there.
among these different areas. So I try to synthesize the types of non-locality in these different areas. And the fact that you have a lot of types is interesting.
But, to head off any questions, let me go into the crystal for a couple minutes because it is actually cool physics. Ergo, reversibility and non-locality are connected.
Everywhere is impacted by human activities. That genotype will respond to the future climate in your locality .