Talk:Phase-space formulation

This article is rated C-class on Wikipedia's content assessment scale. It is of interest to the following WikiProjects:

Physics Mid‑importance This article is within the scope of WikiProject Physics, a collaborative effort to improve the coverage of Physics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.PhysicsWikipedia:WikiProject PhysicsTemplate:WikiProject Physicsphysics Mid This article has been rated as Mid-importance on the project's importance scale. Mathematics Low‑priority This article is within the scope of WikiProject Mathematics, a collaborative effort to improve the coverage of mathematics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.MathematicsWikipedia:WikiProject MathematicsTemplate:WikiProject Mathematicsmathematics Low This article has been rated as Low-priority on the project's priority scale.

A fact from Phase-space formulation appeared on Wikipedia's Main Page in the Did you know column on 20 June 2012. The text of the entry was as follows: Did you know... that quantum mechanics can be formulated entirely in phase space if a quantum system is represented by a quasi-probability distribution? A record of the entry may be seen at Wikipedia:Did you know archive/2012/June. The nomination discussion and review may be seen at Template:Did you know nominations/Phase space formulation.

The time-dependent WF figures in the SHO section need clicking (twice) to animate, even though they are animated .gif files. I wonder what is off. Cuzkatzimhut (talk) 17:23, 31 July 2012 (UTC)Reply

Re: User:Maschen's edit on yanking out Schr rep linkage. I would actually agree with whoever originally emphasized the Schr rep. In this version of the phase space formulation, x and p are time independent, and the Wigner function (==density matrix) is time dependent. Dynamical trajectory (x(t),p(t)) cultists have found themselves in endless morasses of grief and confusion, all avoidable... So, Moyal's dynamical equation is basically the Schr-rep von Neumann eqn expressed in phase space. An astute reader could figure it all by themselves, but why be in this article then? I would strongly urge restoration of logical linkage to the Schr rep. Cuzkatzimhut (talk) 14:58, 13 March 2013 (UTC)Reply

Done. Better? Or you prefer the ordinal wording? Thanks for feedback, M∧Ŝc²ħεИ_τlk 15:15, 13 March 2013 (UTC)Reply

Better, in my (limited) view. I think it is fine, but can use "useS"..... Thanks for your salutary efforts! Cuzkatzimhut (talk) 15:23, 13 March 2013 (UTC)Reply

No worries! Fixed my poor grammar too. Thanks. M∧Ŝc²ħεИ_τlk 15:34, 13 March 2013 (UTC)Reply

I reverted a repetitive plug today of the Bargmann-Segal transform leading to the Husimi distribution. That distribution is already suggested as an alternative, and referenced, further up in the text, and its derivation should not be of interest here. In addition, the implication that it might be a bona -fide probability distribution, instead, is plainly unsound. It too violates Kolmogorov's 3rd axiom, as any distribution in accord with the uncertainty principle; and, worse, to produce expectation values of functions identically to the Wigner function, it requires unintegrated star products inside the integral, in sharp contrast to the Wigner function picture. Misleading polemical labels on it have no place in this particular article here. Cuzkatzimhut (talk) 02:47, 15 November 2013 (UTC)Reply