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Mike Witt replied to the topic "Notifications" doesn't update in the forum Technical Support & Website Feedback 2 days, 11 hours ago
Hmm … you shouldn’t have to actually restart the browser. There should be some way to refresh it (refresh, reload, or something like that — depending on which browser). On the version of Firefox I’m using, there’s an icon that looks like an arrow going in a circle. You can click on that to do a “partial” refresh and shift-click on it for a…[Read more]
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Joel Preston Smith replied to the topic "Notifications" doesn't update in the forum Technical Support & Website Feedback 2 days, 13 hours ago
Shutting down the browser updates it. I’ll follow your instructions to delete messages. Thank you.
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Mike Witt replied to the topic "Notifications" doesn't update in the forum Technical Support & Website Feedback 4 days, 12 hours ago
Hmm … When I look at your account I see 19. It might be a matter of refreshing your browser? Not sure. Personally I think those notifications are kind of a pain. They never completely go away until you delete them. I generally go to the “notifications” tab on my profile every once in a while and select them all by clicking the checkbox at the…[Read more]
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Joel Preston Smith started the topic "Notifications" doesn't update in the forum Technical Support & Website Feedback 5 days, 2 hours ago
Just wanted to point out that for me the list of notifications doesn’t update. I started with 21 notifications, read three messages, and then saw that I had 21 to go.
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Joel Preston Smith replied to the topic Question re vector spaces in the forum General Discussion 5 days, 3 hours ago
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Mike Witt replied to the topic March 19 Q&A Session in the forum Background Study 1 week ago
I just posted Sunday’s video up at the top of this thread.
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Joel Preston Smith's profile was updated 1 week, 3 days ago
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Wayne Dam replied to the topic Question re vector spaces in the forum General Discussion 1 week, 4 days ago
It’s basically a definition.
The vector space comes first and it has some set finite dimension. Say 3 dimensions like we are used to. Then every vector in that space is said to be three dimensional and can be represented by 3 numbers, its coordinates.
If you begin with a two dimensional space, like a white board or desk top, then all vectors in…[Read more]
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Mike Witt replied to the topic Question re vector spaces in the forum General Discussion 1 week, 4 days ago
Not exactly. There are an infinite number of possible vectors in a space. But all of them have the same dimension. Example: The space for a quantum bit is a complex, 2d space. That simply means that it contains vectors with two components — each of the two components is a complex number.
Hope that made sense.
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Joel Preston Smith started the topic Question re vector spaces in the forum General Discussion 1 week, 4 days ago
Hi, Everyone. On page 13 of the study group notes, there’s this quote: “The dimension of a vector is the same as the dimension it lives in.” Does that mean that for each vector space there can be only one vector within that space? Because if there were two vectors in the space, and the vectors had different dimensions, one of them would not equal…[Read more]
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Mike Witt replied to the topic March 19 Q&A Session in the forum Background Study 1 week, 4 days ago
It’s hard to know what’s going on there. I guess we forgot to start the video at the beginning. It’s possible that it’s just something I wrote simply to provide an example on the fly.
Remind me to start the video this Sunday! -
John Scott replied to the topic March 19 Q&A Session in the forum Background Study 1 week, 4 days ago
I don’t see a problem on either sheet that the video seems to correspond to.
That aside, it’s nice to have these exercises as a way of gauging our abilities.
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Mike Witt started the topic Date TBD: Non-locality III: What is locality and nonlocality? in the forum The Non-Locality Question 1 week, 4 days ago
NOT SCHEDULED YET
Zoom Link:
https://us06web.zoom.us/j/89404330590?pwd=VTBRTjRLNzRDV1h4aEtuUFpFWXBaUT09What do we actually mean by locality and nonlocality?
Are there different kind of nonlocality? -
Mike Witt replied to the topic March 19 Q&A Session in the forum Background Study 1 week, 4 days ago
I’m not actually sure, but it looks like these were given out on the previous (June 7th) session (assuming I’m parsing things right.) Take a look at these two:
http://github.physicscafe.org/2020-QI-Series/Problems-Change-Basis.pdf
http://github.physicscafe.org/2020-QI-Series/Problems-Change-Basis-Complex.pdf
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John Scott replied to the topic March 19 Q&A Session in the forum Background Study 1 week, 4 days ago
I’m looking at the video from June 14th. It starts with Mike in the middle of working a problem, but it doesn’t look like it corresponds to any of the 8 problems from the Notes pages 34-35 (Notes generated June 15 2020). Can anyone orient me as to what is being worked on?
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Wayne Dam started the topic New Video Podcast at Math3ma Institute: fAQ- in the forum General Discussion 1 week, 5 days ago
The link to the page is here.
Discusses ties between information theory and quantum mechanics.New Video Podcast: fAQ
March 14, 2023In a bit of fun news, I’ve just launched a new video podcast with my coworker Adam Green. This new video series, which we’re calling fAQ, consists of casual conversations between me and Adam on basic ideas in…
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Mike Witt started the topic March 19 Q&A Session in the forum Background Study 2 weeks ago
We’ll attempt to answer any questions people want to bring, primarily regarding the material currently on the table, but other (math and physics) topics if time allows.
If possible review the videos mentioned in last week session first!
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Mike Witt started the topic Non-locality II: GHZ Measurements in the forum The Non-Locality Question 2 weeks ago
NOT SCHEDULED YET
Discuss GHZ Measurements and why they appear to rule out predetermined values (hidden variables) as an explanation of entanglement correlations.
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Mike Witt started the topic Non-locality I: Introduction in the forum The Non-Locality Question 2 weeks ago
NOT SCHEDULED YET
Discuss the “puzzle” of the correlations inherent in some entangled states. Review some basics of special relativity and explain why the standard outlook of relativistic physics appears to rule out communication as a basis for the correlations.
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Mike Witt replied to the topic March 12: Review Session in the forum Background Study 2 weeks ago
And here’s the video. Sorry I forgot to start recording at the beginning!
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