And then I guess wrt ontology I’ve now found myself a wavefunction realist, despite how appealing I used to find the (vaguely understood by me) ideas of QBism and the like.
December 23, 2025 at 4:34 PM
And then I guess wrt ontology I’ve now found myself a wavefunction realist, despite how appealing I used to find the (vaguely understood by me) ideas of QBism and the like.
Quantum Bayesianism (QBism): Wave functions represent subjective credences, not objective realities. The “quantum state” is the observer’s compactified model, not a description of mind-independent existence—making observer and observed fundamentally 0-inseparable.
December 19, 2025 at 2:27 PM
Quantum Bayesianism (QBism): Wave functions represent subjective credences, not objective realities. The “quantum state” is the observer’s compactified model, not a description of mind-independent existence—making observer and observed fundamentally 0-inseparable.
December 17, 2025 at 7:46 AM
Christopher A. Fuchs, Blake C. Stacey: QBism, Polishing Some Points https://arxiv.org/abs/2512.14122 https://arxiv.org/pdf/2512.14122 https://arxiv.org/html/2512.14122
December 17, 2025 at 6:49 AM
Christopher A. Fuchs, Blake C. Stacey: QBism, Polishing Some Points https://arxiv.org/abs/2512.14122 https://arxiv.org/pdf/2512.14122 https://arxiv.org/html/2512.14122
GPT 5.1 (paid version) seems to get this okay:
"Short answer: No, Steven French is not an advocate of QBism.
But he does take QBism seriously and has written about it in a broadly sympathetic and illuminating way.... [and] has sometimes defended QBism against superficial criticisms"
"Short answer: No, Steven French is not an advocate of QBism.
But he does take QBism seriously and has written about it in a broadly sympathetic and illuminating way.... [and] has sometimes defended QBism against superficial criticisms"
December 14, 2025 at 1:10 PM
GPT 5.1 (paid version) seems to get this okay:
"Short answer: No, Steven French is not an advocate of QBism.
But he does take QBism seriously and has written about it in a broadly sympathetic and illuminating way.... [and] has sometimes defended QBism against superficial criticisms"
"Short answer: No, Steven French is not an advocate of QBism.
But he does take QBism seriously and has written about it in a broadly sympathetic and illuminating way.... [and] has sometimes defended QBism against superficial criticisms"
A recent book in the philosophy of physics characterises me as an advocate of QBism (I’m not). So, inspired by this piece by John Scalzi, I asked a handful of AI systems ‘Is Steven French a QBist?’
Today in "Don't Trust AI to Tell You Facts": How several different "AI" programs messed up the simple fact of to whom I dedicated a book, and what that means for how much you should trust "AI" to tell you the truth about things (spoiler: not much at all):
whatever.scalzi.com/2025/12/13/a...
whatever.scalzi.com/2025/12/13/a...
“AI”: A Dedicated Fact-Failing Machine, or, Yet Another Reason Not to Trust It For Anything
I search my name on a regular basis, not only because I am an ego monster (although I try not to pretend that I’m not) but because it’s a good way for me to find reviews, end-of-the-yea…
whatever.scalzi.com
December 14, 2025 at 10:21 AM
A recent book in the philosophy of physics characterises me as an advocate of QBism (I’m not). So, inspired by this piece by John Scalzi, I asked a handful of AI systems ‘Is Steven French a QBist?’
読書会で枠をいただきましたので以下の発表をします
御酒飲太郎（a.k.a. 星原渚）
「Physicist → Magician ――主観・規範・跳躍」（仮）
七夕坂蓮子の物理学をQBism的観点から議論する胡乱な感じのやつです。宜しくお願い致します。
御酒飲太郎（a.k.a. 星原渚）
「Physicist → Magician ――主観・規範・跳躍」（仮）
七夕坂蓮子の物理学をQBism的観点から議論する胡乱な感じのやつです。宜しくお願い致します。
以前に川崎読書会に参加を検討されていた皆様、連絡等ありますので参加ご希望のかたはツイプラでの申し込みをお願いいたします。
[TwiPla] 第３回 京浜東方読書会
twipla.jp/events/705136
[TwiPla] 第３回 京浜東方読書会
twipla.jp/events/705136
第３回 京浜東方読書会 - TwiPla
またまた読書会とプレゼン発表会をやります。◆趣旨 東方pojectに関する同人誌や書籍を読んだり、原作について語りあったりして 楽しく盛り上がる会です。 主宰：銅折葉（@domioiha）／折葉坂三番
twipla.jp
December 12, 2025 at 10:36 AM
読書会で枠をいただきましたので以下の発表をします
御酒飲太郎（a.k.a. 星原渚）
「Physicist → Magician ――主観・規範・跳躍」（仮）
七夕坂蓮子の物理学をQBism的観点から議論する胡乱な感じのやつです。宜しくお願い致します。
御酒飲太郎（a.k.a. 星原渚）
「Physicist → Magician ――主観・規範・跳躍」（仮）
七夕坂蓮子の物理学をQBism的観点から議論する胡乱な感じのやつです。宜しくお願い致します。
専門外ですが、とても面白かったのでScienceの記事を紹介。
量子の振る舞いを説明する新しい解釈として「QBism」という考えがある。これは、量子力学的な「確率」は客観的なものではなく、主観的なものという考え。つまり観測者によって得られる結果が違っているという趣旨。私もまだ十分理解できていないですが、「不気味な遠隔作用」や「パラレルワールド」などと言われるよりも個人的には腹落ちしました。
www.science.org/content/arti...
量子の振る舞いを説明する新しい解釈として「QBism」という考えがある。これは、量子力学的な「確率」は客観的なものではなく、主観的なものという考え。つまり観測者によって得られる結果が違っているという趣旨。私もまだ十分理解できていないですが、「不気味な遠隔作用」や「パラレルワールド」などと言われるよりも個人的には腹落ちしました。
www.science.org/content/arti...
100 years on, quantum mechanics is redefining reality—with us at the center
Increasingly popular theories hold that experimental outcomes really do depend on the observer
www.science.org
December 8, 2025 at 12:32 PM
専門外ですが、とても面白かったのでScienceの記事を紹介。
量子の振る舞いを説明する新しい解釈として「QBism」という考えがある。これは、量子力学的な「確率」は客観的なものではなく、主観的なものという考え。つまり観測者によって得られる結果が違っているという趣旨。私もまだ十分理解できていないですが、「不気味な遠隔作用」や「パラレルワールド」などと言われるよりも個人的には腹落ちしました。
www.science.org/content/arti...
量子の振る舞いを説明する新しい解釈として「QBism」という考えがある。これは、量子力学的な「確率」は客観的なものではなく、主観的なものという考え。つまり観測者によって得られる結果が違っているという趣旨。私もまだ十分理解できていないですが、「不気味な遠隔作用」や「パラレルワールド」などと言われるよりも個人的には腹落ちしました。
www.science.org/content/arti...
and of themselves and “what’s real is what’s real relative to us”. Fuchs’s ‘QBism’ view argues that the state of a quantum object is “a state of mind” and reflects the subjective degree of belief that an agent has about its properties.
December 6, 2025 at 2:07 AM
and of themselves and “what’s real is what’s real relative to us”. Fuchs’s ‘QBism’ view argues that the state of a quantum object is “a state of mind” and reflects the subjective degree of belief that an agent has about its properties.
I wrote a whole (overly) long thing about how QBism differs from the Caves--Fuchs--Schack take on quantum probabilities from the turn of the century. It ended up becoming a chapter in the Routledge book on QBism and the philosophy of phenomenology, but the free version has the essentials.
arxiv.org
December 6, 2025 at 2:01 AM
I wrote a whole (overly) long thing about how QBism differs from the Caves--Fuchs--Schack take on quantum probabilities from the turn of the century. It ended up becoming a chapter in the Routledge book on QBism and the philosophy of phenomenology, but the free version has the essentials.
The description of QBism is incorrect. QBism does not say that "the state of a quantum object reflects the subjective degree of belief that an agent has about its properties". The beliefs are about the possible *consequences to the agent* of the agent's *potential future actions*.
December 6, 2025 at 12:47 AM
The description of QBism is incorrect. QBism does not say that "the state of a quantum object reflects the subjective degree of belief that an agent has about its properties". The beliefs are about the possible *consequences to the agent* of the agent's *potential future actions*.
| + - | ≤ 1 + ||,ρ_sys = Tr_env [U ρ_tot U†],ψ_avancée = ψ_retardée* (conjugaison complexe),P = |<φ|ψ>|^2 / (<φ|φ><ψ|ψ>),P_post = P_prior * likelihood / evidence,O : |ψ>_S/O. Extension QBism + relational,H_ling = ∑ σ_i ⊗ ω_j #MQ
November 28, 2025 at 1:15 AM
| + - | ≤ 1 + ||,ρ_sys = Tr_env [U ρ_tot U†],ψ_avancée = ψ_retardée* (conjugaison complexe),P = |<φ|ψ>|^2 / (<φ|φ><ψ|ψ>),P_post = P_prior * likelihood / evidence,O : |ψ>_S/O. Extension QBism + relational,H_ling = ∑ σ_i ⊗ ω_j #MQ
November 26, 2025 at 5:17 PM
Jacques L. Pienaar: French on London and Bauer, and QBism https://arxiv.org/abs/2510.11544 https://arxiv.org/pdf/2510.11544 https://arxiv.org/html/2510.11544
October 14, 2025 at 6:50 AM
Jacques L. Pienaar: French on London and Bauer, and QBism https://arxiv.org/abs/2510.11544 https://arxiv.org/pdf/2510.11544 https://arxiv.org/html/2510.11544
October 14, 2025 at 5:39 AM
Francois-Igor Pris: QBism and relational interpretation of quantum mechanics from the point of view of a contextual quantum realism (CQR) https://arxiv.org/abs/2510.09237 https://arxiv.org/pdf/2510.09237 https://arxiv.org/html/2510.09237
October 13, 2025 at 6:50 AM
Francois-Igor Pris: QBism and relational interpretation of quantum mechanics from the point of view of a contextual quantum realism (CQR) https://arxiv.org/abs/2510.09237 https://arxiv.org/pdf/2510.09237 https://arxiv.org/html/2510.09237
Francois-Igor Pris
QBism and relational interpretation of quantum mechanics from the point of view of a contextual quantum realism (CQR)
https://arxiv.org/abs/2510.09237
QBism and relational interpretation of quantum mechanics from the point of view of a contextual quantum realism (CQR)
https://arxiv.org/abs/2510.09237
October 13, 2025 at 6:13 AM
Francois-Igor Pris
QBism and relational interpretation of quantum mechanics from the point of view of a contextual quantum realism (CQR)
https://arxiv.org/abs/2510.09237
QBism and relational interpretation of quantum mechanics from the point of view of a contextual quantum realism (CQR)
https://arxiv.org/abs/2510.09237
QBism and relational interpretation of quantum mechanics from the point of view of a contextual quantum realism (CQR)
https://arxiv.org/pdf/2510.09237
Francois-Igor Pris.
https://arxiv.org/pdf/2510.09237
Francois-Igor Pris.
https://arxiv.org/abs/2510.09237
arXiv abstract link
arxiv.org
October 13, 2025 at 3:32 AM
QBism and relational interpretation of quantum mechanics from the point of view of a contextual quantum realism (CQR)
https://arxiv.org/pdf/2510.09237
Francois-Igor Pris.
https://arxiv.org/pdf/2510.09237
Francois-Igor Pris.
Qbism is probably the correct interpretation of the wave function collapse
October 10, 2025 at 8:33 PM
Qbism is probably the correct interpretation of the wave function collapse
What happened this month to make everyone look for papers on QBism (but not download them)? philsci-archive.pitt.edu/14824/
September 23, 2025 at 11:56 PM
What happened this month to make everyone look for papers on QBism (but not download them)? philsci-archive.pitt.edu/14824/
Yes! This is why QBism is so exciting and I have been happy to be part of their big @templetonfdn.bsky.social project. But, as you say, QBism has been the only QM domain that has ingested phenomenology's central lessons about the primacy experience.
Lots of really exciting work to be done there.
Lots of really exciting work to be done there.
Chris Fuchs has talked about Phenomenology and Husserl a fair bit in this respect - but yes, he's a rarity in that regard.
September 23, 2025 at 11:53 PM
Yes! This is why QBism is so exciting and I have been happy to be part of their big @templetonfdn.bsky.social project. But, as you say, QBism has been the only QM domain that has ingested phenomenology's central lessons about the primacy experience.
Lots of really exciting work to be done there.
Lots of really exciting work to be done there.