Talk:Creation and annihilation operators/Archive 1

Archive 1

Energy levels

Sorry for deleting your comments about changing energy levels. I'm not familiar with quantum chemistry, only quantum field theory. Phys 22:57, 3 April 2005 (UTC)

Hey, no sweat - it's Wikipedia - good changes are always welcome ;) HappyCamper 23:29, 3 April 2005 (UTC)

Untitled 1

I thought the top section of this article in the references to field theory, quantum chemistry and ladder operators was somewhat misleading. Generally in quantum chemical papers, creation and annihilation operators refer to creation and annihilation of an electron, and in solid state papers its can be an electron or a hole depending on the context. Salsb 18:40, 1 July 2005 (UTC)

recat

Creation and annihilation operators are useful notations in the whole quantum mechanics see for example harmonic oscillator. Nevertheless they play a particular role in Quantum Field Theory since they are the basis for the second quantization. However they don't play a particular role in Quantum Chemistry at least not more than in Solid State Physics or Plasma Physics or Many-Body Physics.--147.231.28.83 09:49, 29 August 2005 (UTC)

Edited the fourth math-line on this page to improve readability

I entered this article first time a few weeks ago, while preparing a seminar presentation on semiconductor lasers. The text here is an excellent reference for people like me who do not use quantum mechanical formulation as an everyday routine, but have studied it possibly a few years earlier. I was astonished about the comment, "This article may require cleanup". To me the weakest point was on the fourth math line of the article. I found that the readability could be improved with a minor modification, that I made. Regards, Juha Viljanen 195.165.83.2 12:20, 19 January 2006 (UTC)

An advice

Hi to all. First I have to say that my english is very poor, sorry for that. I think that can be usefull put the form of the raising and lowering operartors as, for example

$J_{+}=J_{x}+iJ_{y}$

$J_{-}=J_{x}-iJ_{y}$ —The preceding unsigned comment was added by 193.144.179.151 (talk • contribs) .

Perhaps it would be a good idea to include them...but somehow we need to say that those come from angular momentum operators, and you can't ladder up to infinity. --HappyCamper 19:55, 19 July 2006 (UTC)

yes you can, but you get 0 pretty soon --MarSch 11:42, 30 January 2007 (UTC)