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Questions tagged [physics]

All issues relation physics and computation theory (excluding computational hardware or use of computers in physics). May include, for example, analog computing, reversible computing, physical analysis of computability (Church-Turing thesis).

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Is there any specific model/theory that proposes that the universe is an oracle machine? [closed]

Is there any specific (and well known/famous) model/theory that proposes that the universe is an oracle machine? Physicist Roger Penrose said his book "The Shadows of the Mind" It would be just as ...
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1answer
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Are physical laws uncomputable in any type of computation (according to this article)?

It seems that this article (https://arxiv.org/pdf/1312.4456.pdf) proposes that laws of physics are uncomputable (i.e., they could not be reproduced on a computer), but I'm not sure about it. In some ...
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1answer
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Potential General Model of Computation with Physics?

I posted a question about a month back regarding the significance of Turing machines (relative to other models of computation). In that post, I mentioned vaguely some conversion between an input ...
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1answer
573 views

What is the difference between luma and luminance?

I understand the following (correct me if I'm wrong): Statements Luma as the weighted sum of RGB gamma corrected components, but luminance is the weighted sum of RGB linear components. The gamma ...
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1answer
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Learning dynamics

I recently learned about Q-learning, a reinforcement learning technique that directly estimates the expected value of taking an action in a state. I'm wondering if there exists techniques to do "...
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1answer
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Reference Request: Overlaps between complexity theory and dynamical systems?

Per Wikipedia: In mathematics, a dynamical system is a system in which a function describes the time dependence of a point in a geometrical space. Examples include the mathematical models that ...
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Research in realtime computational physics?

I am aware that there is a considerable amount of interest in computational mechanics for simulation of cloth, hair and other elastica, particularly for animation films. The methods developed by ...
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1answer
209 views

Patriot Missile Software Bug (Range Gate Calculation) [closed]

Okay so I was reading about the Patriot Missile Software Bug, where to calculate the predicted range gate the missile system relied on the time keeping, however it would convert the whole/integer time ...
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3answers
427 views

Can normal physics laws be simulated in Digital physics? [closed]

Physics is defined as the study of an object {matter or energy} with its interaction with other objects: Physics is the study of matter, energy, and the interaction between them. On the other ...
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3answers
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Could an NP-hard problem have a mechanical or physical solution method?

Is there any NP-hard problem that we can find a mechanical "polynomial time" solution to? For example, suppose we construct a graph out of something physical, e.g. we have have pipes through which we ...
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6answers
420 views

Undecidable problems limit physical theories

Does the existence of undecidable problems immediately imply the non-predictability of physical systems? Let us consider the halting problem, first we construct a physical UTM, say using the usual ...