Recent content by sugeet

Oh sorry, I mean constant frequency and zero bandwidth, I am sorry, that's a mistake, I mean it extends infinitely in temporal space.

Plane wave is defined as exp(-iwt), where 'w' is the frequency. In Fourier decomposition when we say that any complicated wave-function can be expressed as a superpostion of plane waves, we then do not refer to the geometry of wavefronts but to the meaning of a specific frequency. Plane waves by...

This question is absurd, if the photons emitted have wavelength of 2 meters, then we assume that source can emit only 2meters(wavelegth) photons. Its not like in shorter time shorter wavelengths come out and in longer time longer one`s come out, radiation is discreet! We must also understand...

If you are referring to me, then yes I mean plane waves only, because plane waves are supposedly single frequency and they are hypothetical, we always have a finite width and not a Dirac Delta function in the frequency domain.

radio gets em waves as signals, that are tapped in by the metallic conductor, music is acoustic waves, I understand that you are confusing the two!

by direction of time you mean increasing right? Are you asking if the space-time is curved? yes it is what do u mean by position, with respect to what? If you condider an object on the surface of the earth, position defined by latitude and longitude, then yes after a certain interval of time...

you are right, you could read abt similarity transformation!

it is used in many places, for example in waveguide optics, we do the same, you could look up at "Kumar`s method (perturbation method)", this link might be useful! http://www.opticsinfobase.org/ol/fulltext.cfm?uri=ol-8-1-63&id=7914

Anyways since plane waves are hypothetical, everything we see is finally a small band of wavelengths!

somehow JJ Sakurai Modern quantum mechanics appeals well to me!, may be you should try it. Good introduction about history and development is presented in Feynman lectures and David Bohm`s book

Thank you very much! Really grateful to you! However I would like you to elaborate and also give a qualitative explanation.

So what is it in general? I mean let's say in the middle of the rotation through the complex plane that you suggested. In my humble opinion I think the answer to the above question is yes in some sense, we must also consider that we are making measurements in the eigen-space of the operator...

I was reading about 'Polaritons" and Happened to come across this principle called " Avoided Crossing Principle", it is also called "Level Repulsion". They say (wikipedia) that Polaritons are expressions of this quantum phenomena! Can anyone throw some light on this? I really did not...

Thank you Zarqon for replying, I did some search and got my answer. The Wiki page says :"The polariton is a bosonic quasiparticle, and should not be confused with the polaron, a fermionic one, e.g. an electron plus attached phonon cloud. ". Precisely something I was looking for, if you are...

Can we have a coherent state between a fermion and a photon! I mean can there ever be a fermionic polariton?