88 reputation
9
bio website home.iitk.ac.in/~ukumar
location Kanpur, India
age 24
visits member for 2 years, 7 months
seen Aug 23 at 17:15

I am currently studying on Quantum Optics to decide what I can contribute to the field (to be honest it is part of project I am not as big philosopher as I would like to be).


Jun
25
awarded  Nice Question
Jan
29
awarded  Popular Question
Nov
29
revised How can particles travel in a straight line?
improved formatting, fixed grammer.
Nov
28
accepted Is Type-0 phase matching in BBO crystal possible?
Nov
28
answered Is Type-0 phase matching in BBO crystal possible?
Nov
26
revised Discord for partially decohered bell state
missed a word needed for grammatical completeness.
Nov
26
accepted Discord for partially decohered bell state
Nov
26
answered Discord for partially decohered bell state
Nov
25
comment Discord for partially decohered bell state
@NorbertSchuch I have changed it's privacy please. this works now. I checked it by signing out. please try it now.
Nov
24
comment What are the differences between indistinguishable and identical?
@twistor59 I think one always Should anti-symmetrize the wavefunction but we choose not to since the error introduced by consideration in calculation is usually insignificant. But nothing really stop us from saying that, if we swap the two electrons wavefunction of universe picks up a minus sign simply as consequence that they are spin-half particles. To put it explicitly electron in andromeda and electron on earth are only Effectively distinguishable.
Nov
24
comment Discord for partially decohered bell state
@Norbert Sorry I wrote it wrong, but you can see in mathematica code that I used it correctly. Thanks I'll correct it now.
Nov
24
revised Discord for partially decohered bell state
correction to state of system AB.
Nov
22
asked Discord for partially decohered bell state
Sep
8
comment Conservation Laws in Photon Parametric Down-Conversion
I guess KDN answers related question very well.
Sep
8
comment Conservation Laws in Photon Parametric Down-Conversion
dude look up the wiki article for parametric process. I just meant that parametric ==> you don't need to take into account for the crystal momentum. Though I do not know why crystal momentum is not included in PDC phase-matching, I do know that you can satisfy PM conditions and calculate the non-collinear and collinear ks and ki. In this image you will find signal and idler ring on the screen at the distance = 10 cm from BBO crystal with pump wavelength = 351.1 nm for $\theta_{pump} = 47.4^\circ$. See this
Sep
4
answered Conservation Laws in Photon Parametric Down-Conversion
Sep
3
awarded  Editor
Sep
3
revised How does the uncertainty principle make a photon beam spread out?
Additional note.
Sep
3
answered How does the uncertainty principle make a photon beam spread out?
Jul
27
awarded  Tumbleweed