Mitchell Porter

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Physics Stack Exchange users whose comments are worth studying include Lubos Motl and Ron Maimon (now at http://www.quora.com/Ron-Maimon). Also see http://arxiv.org/abs/hep-ph/0207124 for a review of physics since the standard model.

	2,223 reputation	bio	website	taufunctionsquared.blogspot.c…	visits	member for	2 years, 4 months
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3h	comment	What is the meaning of the concepts of “operator mixing” (and anomalous dimensions) I disagree with the closing of this question. It asks for definitions of terms, it mentions an equation in an article as an example of something to understand better, and it asks if they are known under other names. The upside of leaving it open is that someone might write an informative answer. What is the downside?
May 16	comment	How can string theory work without supersymmetry? Actually, the SO(16) x SO(16) string in that paper might already be an example of the type 0 string? Anyway, one thing to note is that some of these "nonsusy strings" still have a type of susy somewhere, e.g. on the worldsheet but not in spacetime.
May 16	comment	How can string theory work without supersymmetry? Along with the type 0 string, arxiv.org/abs/hep-th/9707148 is another example.
May 15	comment	What are the implications of the Nesvizhevsky experiment and followup experiments with ultracold neutrons? Technically they weren't quantum gravity experiments, they involved quantum mechanics in a gravitational field, which is different because the gravitational part can be treated classically.
May 13	answered	Why should SUSY be expected naturally?
May 3	comment	References for ADM formalism and cosmological perturbation theory @Qmechanic Maybe it's closure plus negative total votes that implies deletion, then...?
May 3	comment	References for ADM formalism and cosmological perturbation theory If this question has been closed, doesn't that mean it's going to be deleted? Which will also remove the useful lists of references here.
May 1	answered	Casuality between ordinary people's language and physisct
Apr 25	answered	A Game Of The Number Of Space-Time Dimensions
Apr 23	comment	Production vs. Collection, and Contaminants vs. Depositions, what might be missing in cold fusion research The "hello-type introduction" could go on your profile page.
Apr 22	comment	Motivation for the Deformed Nekrasov Partition Function mitchell.physics.tamu.edu/Conference/string2010/documents/… ... I think its chief utility lies somewhere in the space between M-theory and SQCD.
Apr 17	comment	Some Korean researchers saying that they solved Yang-mill existence and mass gap problem Yongmin Cho has been pushing this idea for more than ten years e.g. arxiv.org/abs/hep-th/0301013
Apr 14	comment	Vector and Spinor Representation in Ramond-Neveu-Schwarz Superstring Theory I suggest that you put an email address in your profile so that people can contact you. If someone who actually knows string theory could talk with you, they should be able to quickly identify what would be useful for you to learn next.
Apr 11	revised	Are the $10^{500}$ different string theories being whittled down? added 943 characters in body
Apr 11	answered	Are the $10^{500}$ different string theories being whittled down?
Apr 3	comment	Does the wave function/density state actually exist? @wnoise It's ultimately a question of quantum computational complexity and not proven. But all the known speedups obtained by quantum computers (e.g. in Shor's algorithm) are at best sub-exponential, suggesting that this is the true increment of complexity involved in passing from classical to quantum.
Apr 3	comment	Doubts about NASA's announcement of collision between Milky Way and Andromeda "Probably caused by the gravitational interaction of the cores" The core of a galaxy is only a fraction of its mass. The whole mass of each galaxy is involved in attracting the other, not just the core.
Mar 30	comment	Are there theories that explain wave-particle duality? Outlier, you should be interested in what are called "interpretations of quantum mechanics". They are the type of theories you're after.
Mar 22	awarded	Nice Question
Mar 21	comment	It's time, but not as we know it Take it to meta.