
Wayne C. Myrvold started the topic Ontology for Collapse Theories in the forum 2017 International Workshop: Collapse of the Wave Function 4 days, 23 hours ago
In this chapter, I will discuss what it takes for a dynamical collapse theory to provide a reasonable description of the actual world. I will start with discussions of what is required, in general, of the ontology of a physical theory, and then apply it to the quantum case. One issue of interest is whether a collapse theory can be a quantum state…[Read more]

Wayne C. Myrvold commented on the post, Lessons of Bell’s Theorem: Nonlocality, yes; Action at a distance, not necessarily. 1 year, 6 months ago
Hi, Eric,
Here’s why I don’t think that the notion of intervention requires an implicit reference to an agent. If you’re studying the climate, you can meaningfully consider its response to an influx of C02 + aerosols from a volcano eruption, but we don’t have to think that these can be under the control of any agent.
What the eruption does…[Read more]

Wayne C. Myrvold commented on the post, Lessons of Bell’s Theorem: Nonlocality, yes; Action at a distance, not necessarily. 2 years, 6 months ago
Hi, Travis,
At this point I’m at risk of simply repeating what I said before.
The analysis of causation adopted in the paper doesn’t show that there’s a causal link between outcome variables, as neither variable can be the target of an intervention in the sense I’m using the term. To be a potential target of an intervention is broader than…[Read more]

Wayne C. Myrvold commented on the post, Lessons of Bell’s Theorem: Nonlocality, yes; Action at a distance, not necessarily. 2 years, 6 months ago
“There *is* a process that can (and does) set them to particular values — it’s just not a process that some agent can control.”
A process of letting a stochastic variable randomly take on some value, and then declaring that that is the value it’s been set to, isn’t what *I* mean by setting it to a particular value. But I don’t want to get…[Read more]

Wayne C. Myrvold commented on the post, Lessons of Bell’s Theorem: Nonlocality, yes; Action at a distance, not necessarily. 2 years, 6 months ago
Your summary of the argument about PI is right, as far as it goes.. But a crucial part of it is that the setting parameters are variables that can be the target of an intervention, which changes the probabilities of events at a distance, and that’s why we have a clear case of actionatadistance.
Then you say, “in the case of OI, you seem to…[Read more]

Wayne C. Myrvold commented on the post, Lessons of Bell’s Theorem: Nonlocality, yes; Action at a distance, not necessarily. 2 years, 6 months ago
You asked,
“Some violations of Bell’s ‘local causality’ (which is manifestly neutral between settingtypevariables and outcometypevariables) end up counting, for you, as the causal kind of nonlocality (i.e., actionsatadistance) and others don’t.”Yes, the condition of local causality, as stated, does not distinguish between settingtype…[Read more]

Wayne C. Myrvold commented on the post, Lessons of Bell’s Theorem: Nonlocality, yes; Action at a distance, not necessarily. 2 years, 6 months ago
Travis, I have two questions that I’d like to get your thoughts on.
In the Trieste lecture Bell distinguishes between theories that have a fundamental reference frame built in, but nevertheless make Lorentz invariant experimental predictions, because the fundamental frame isn’t detectable, and theories that are “Lorentz invariant, not just for…[Read more]

Wayne C. Myrvold commented on the post, Lessons of Bell’s Theorem: Nonlocality, yes; Action at a distance, not necessarily. 2 years, 6 months ago
Hi, Travis,
Glad you picked up on this so quickly. I was going to send you a note, because I very much wanted to get your reaction to this.
First point: Yes, you’re right.
Second point: I don’t want the notion of causality to rest on some kind of distinction between variables that are agentcontrollable and ones that aren’t. See…[Read more]

Wayne C. Myrvold started the topic Lessons of Bell’s Theorem: Nonlocality, yes; Action at a distance, not necessarily. in the forum John Bell Workshop 2014 2 years, 6 months ago
Fifty years after the publication of Bell’s theorem, there remains some controversy regarding what the theorem is telling us about quantum mechanics, and what the experimental violations of Bell inequalities are telling us about the world. This chapter represents my best attempt to be clear about what I think the lessons are. In brief: there is…[Read more]

Wayne C. Myrvold wrote a new post, Lessons of Bell’s Theorem: Nonlocality, yes; Action at a distance, not necessarily. 2 years, 6 months ago
Wayne C. Myrvold
Submitted to “Quantum Nonlocality and Reality – 50 Years of Bell’s theorem”
Fifty years after the publication of Bell’s theorem, there remains some controversy regarding what the theorem is telling us about quantum mechanics, and what the experimental violations of Bell inequalities are telling us about the world. This…[Read more]

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Wayne C. Myrvold joined the group John Bell Workshop 2014 2 years, 8 months ago

Wayne C. Myrvold joined the group Meaning of the Wave Function 2 years, 10 months ago
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