quantum on The Dan MacKinlay family of variably-well-considered enterprises
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Recent content in quantum on The Dan MacKinlay family of variably-well-considered enterprisesHugo -- gohugo.ioen-usSat, 23 May 2020 08:13:15 +1000Quantum computing
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Sat, 23 May 2020 08:13:15 +1000https://danmackinlay.name/notebook/quantum_computing.htmlTopical Courses Emulations, languages Nothing to see here yet apart from some links I myself don’t have time to inspect.
Topical Scott Aaronsons’s Quantum supremacy FAQ, What Google’s Quantum Supremacy Claim Means for Quantum Computing Preskill on quantum supremacy Stephen Jordan’s Quantum Algorithm Zoo Courses Scott Aaronsons’s his lecture notes on quantum computing now available as preprint textbook
His introduction also has some useful leads:Quantum information in physics
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Thu, 14 Dec 2017 16:26:26 +1100https://danmackinlay.name/notebook/quantum_information.htmlI would like to understand this more deeply, through following up the references in this piece:
Scott Aaronson, Is “information is physical” contentful?
“Information is physical.”
This slogan seems to have originated around 1991 with Rolf Landauer. […] There are many things it’s taken to mean, in my experience, that don’t make a lot of sense when you think about them-- or else they’re vacuously true, or purely a matter of perspective, or not faithful readings of the slogan’s words.Quantum probability
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Mon, 18 Sep 2017 09:17:12 +1000https://danmackinlay.name/notebook/quantum_probability.htmlOn real-valued classical probability as a special case of complex-valued quantum probability. More generally (?), non-commutative probability.
Chaitanya Rao, Notes on von Neumann’s algebra formulation of Quantum Mechanics has a side-by-side comparison table, and a reading list for getting up to speed fast.
David Ellerman On Classical and Quantum Logical Entropy: The analysis of measurement advertises an article on this theme.
Terry Tao, maximally general: Notes on Free probability.Quantum-probabilistic graphical models
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Mon, 07 Aug 2017 11:46:35 +1000https://danmackinlay.name/notebook/graphical_models_quantum.htmlWhen you have quantum probability, directed graphical models look different, especially for causality. So I am told.
Jacques Pienaar, Causality in the quantum world:
In the case of two entangled particles, Reichenbach’s principle would suggest that the correlations between the particles could be explained by a common cause. However, we also know that quantum statistics can violate Bell’s inequalities, which means that variables serving as common causes that could make the correlation disappear cannot exist.Hidden variable formalisms in quantum mechanics
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Sat, 28 Nov 2015 07:36:57 +0800https://danmackinlay.name/notebook/hidden_variable_qm.htmlLoosely speaking, we can have quantum mechanics without randomness, driven by deterministic hidden values but then it has to be non-local. This is apparently Bell’s theorem
The most famous version is the De Broglie-Bohm formulation/ pilot-wave theory.
I’m reading about this because actually I’m thinking about the non quantum case; what difference does it make to assume that there is a deterministic variable underlying your apparently random one?
In the classical case, no difference AFAICT.