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Ruediger Schack joined the group 2018 Workshop on Wigner’s Friend 5 years, 6 months ago
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Ruediger Schack replied to the topic Ruediger Schack: QBism and the character of the world in the forum First iWorkshop on the Meaning of the Wave Function 9 years, 5 months ago
Dear Ulrich,
It is tempting to again answer your points one by one. But I fear that this might not lead to more clarity in the end. So what I will do instead is focus on the issue of properties. I also intend this to be my last contribution to the online workshop.
According to QBism, measurements on nuclear spin components and measurements on…[Read more]
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Ruediger Schack replied to the topic Ruediger Schack: QBism and the character of the world in the forum First iWorkshop on the Meaning of the Wave Function 9 years, 5 months ago
Dear Ulrich,
Many thanks for your questions. Let me try to answer them one by one.
You ask:
What would be a QBist’s answer to the question why different agents experience the same particle track? I know that quantum mechanics predicts that the experiences of different agents will be strictly correlated with the real particle track out there, b…[Read more]
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Ruediger Schack replied to the topic Ruediger Schack: QBism and the character of the world in the forum First iWorkshop on the Meaning of the Wave Function 9 years, 5 months ago
Dear Shan,
Thanks for the offer of a new time slot, but I am not free today. I’ll try my best, however, to answer Ulrich’s latest set of questions.
All the best,
Ruediger
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Ruediger Schack replied to the topic Ruediger Schack: QBism and the character of the world in the forum First iWorkshop on the Meaning of the Wave Function 9 years, 5 months ago
I am aware that, because of yesterday’s technical problems, the discussion of my talk has been rescheduled for later today. Unfortunately, it is already late evening in Egham, which means I won’t be able to participate.
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Ruediger Schack replied to the topic Ruediger Schack: QBism and the character of the world in the forum First iWorkshop on the Meaning of the Wave Function 9 years, 5 months ago
Dear Bob,
Thanks again for your questions. Yesterday, my answers were shorter than your questions, and I fear that this pattern will be repeated today. Please don’t interpret this as a lack of interest on my part. It is not.
Concerning your question 3, maybe QBism does not want to make claims about particle tracks, or talk about the Higgs…[Read more]
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Ruediger Schack replied to the topic Ruediger Schack: QBism and the character of the world in the forum First iWorkshop on the Meaning of the Wave Function 9 years, 5 months ago
Dear Shan,
This a very nice question, thank you. Let me answer the second part first. I agree entirely that quantum mechanics helps us to learn about reality. I was trying to express this in the title of my talk: QBism and the character of the world. QBism is sometimes (wrongly) labeled as anti-realist. This label is misleading because QBism does…[Read more] -
Ruediger Schack posted a new activity comment 9 years, 5 months ago
Dear Shan,
This a very nice question, thank you. Let me answer the second part first. I agree entirely that quantum mechanics helps us to learn about reality. I was trying to express this in the title of my talk: QBism and the character of the world. QBism is sometimes (wrongly) labeled as anti-realist. This label is misleading because QBism does…[Read more]
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Ruediger Schack changed their profile picture 9 years, 6 months ago
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Ruediger Schack replied to the topic Ruediger Schack: QBism and the character of the world in the forum First iWorkshop on the Meaning of the Wave Function 2014 9 years, 6 months ago
Dear Bob,
You ask: “Alternatively, how is the QBist approach motivated
by specific quantum mechanical phenomena, and how does it help to think about them?”Take, for example, the no-cloning theorem. It has a trivial explanation if one thinks of the wave function as epistemic. Take the Kochen-Specker theorem. It implies that measurements do…[Read more]
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Ruediger Schack replied to the topic Ruediger Schack: QBism and the character of the world in the forum First iWorkshop on the Meaning of the Wave Function 9 years, 6 months ago
Dear Bob,
1. How does QBism treat the two measurement problems: (i) the
Schrodinger cat problem and (ii) how the pointer is related to properties of the microscopic system before the measurement took place. And what use is made of the quantum wavefunction in discussing these.Thanks for your questions. To answer 1 (i), say I assign a…[Read more]
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Ruediger Schack joined the group Meaning of the Wave Function 9 years, 6 months ago