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Forums
Quant's latest activity
Q
Quant
reacted to
Philip Koeck's post
in the thread
I
How to narrow a beam to 1 mm diameter?
with
Like
.
You can do it with 2 lenses. The first has to have 10 times the focal length of the second, for example 100 mm and 10 mm. Place them so...
Friday, 3:59 AM
Q
Quant
reacted to
johnbbahm's post
in the thread
A
How produce twin photons in practice?
with
Like
.
Beam ex panders work both ways, they can also make the beam diameter smaller. Depending on the power level, you might want to avoid a...
Friday, 3:58 AM
Q
Quant
posted the thread
I
How to narrow a beam to 1 mm diameter?
in
Optics
.
I have a collimated beam from a laser diode d= 10 mm and want to narrow it down to 1 mm. I suppose to use a lense to focus it and then...
Wednesday, 11:49 PM
Q
Quant
replied to the thread
A
How produce twin photons in practice?
.
Thank you. I see. Collimating is ok but how to bring the beam size to 2 mm. Of course I will use a lense to focus the beam to a point...
Wednesday, 11:35 PM
Q
Quant
posted the thread
A
How produce twin photons in practice?
in
Quantum Physics
.
I would be very thankful if somebody helps me with some practical advices about producing twin photons? I know that twins are produced...
Tuesday, 4:29 PM
Q
Quant
reacted to
Demystifier's post
in the thread
I
Are there any accepted relativistic interpretations of quantum mechanics?
with
Like
.
For a response to such critiques see my https://arxiv.org/abs/2205.05986
May 1, 2024
Q
Quant
replied to the thread
A
Feynman rules for Entangled photons
.
Why should we put a single slit before DS? If the (say idler) photons of entangled pairs do not make DS interference pattern one will...
Apr 30, 2024
Q
Quant
replied to the thread
A
Feynman rules for Entangled photons
.
There is not such thing as Feynman rules. What I use is just a working slang. I could say the 'rules for constructing the path...
Apr 30, 2024
Q
Quant
replied to the thread
A
Feynman rules for Entangled photons
.
Thanks Dr. Chinese. Are you saying we can not destroy photon 1 of a entangled pair and leave photon 2 on an infinite journey in all...
Apr 29, 2024
Q
Quant
replied to the thread
A
Feynman rules for Entangled photons
.
And when the one photon (2) is registered in the detector (c) there would be just one photon (1). Does it has no amplitude? Can Feynman...
Apr 29, 2024
Q
Quant
replied to the thread
A
Feynman rules for Entangled photons
.
The problem here is strictly in Feynman paths not any other formulations. So I want to know just the amplitude of photon 1 from 'a'...
Apr 29, 2024
Q
Quant
replied to the thread
A
Feynman rules for Entangled photons
.
Maybe. But in experiment like DSE and MZI one measure the positions by positioned photon detectors. I am interested in only these...
Apr 29, 2024
Q
Quant
replied to the thread
A
Feynman rules for Entangled photons
.
I understand this as one particle going two distant paths at the same time together.(e.g photon1 goes also the paths of photon2 which...
Apr 27, 2024
Q
Quant
replied to the thread
A
Feynman rules for Entangled photons
.
Is the Feynman integral in configuration space or in momentum space?
Apr 27, 2024
Q
Quant
replied to the thread
A
Feynman rules for Entangled photons
.
I don't know Feynman reformulation of QM about entangled pair. For single particle it is 100 % sure that we consider all paths between...
Apr 27, 2024
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