42,945 reputation
1980173
bio website ellipsix.net
location Wuhan, China
age 29
visits member for 4 years, 4 months
seen 8 hours ago

I'm a postdoc doing research in high-energy particle physics. I also have a hobby interest in computer programming.

You can find me on Twitter, or check out my blog and personal website! Or you can email me at stack@ellipsix.net.

Please don't contact me through any other channel about something that should be handled through this site. If you do, I'll probably just tell you to post it here.

Any responses to moderator messages, or comments on official moderation actions here, will be ignored if sent through external channels!


1h
awarded  Announcer
8h
comment Gravity - What happens when two objects of unequal masses fall freely towards the ground? (Revisited)
I dunno, this isn't a peer-reviewed venue, I don't think we necessarily need to see source code for all results posted. That being said, it certainly wouldn't hurt. The bigger issue I think is that long lists of numbers are not useful. This would be better off as a visualization of some kind.
10h
comment How does Ohm's law relate to transferring energy?
What do you mean "1 ohm by the wire"? I don't see this 1-ohm resistor in your diagram.
10h
comment If the LHC-calculated mass of the Higgs is wrong, how long will it take to determine this with confidence?
This is definitely a better question after the edit, although as to whether it is enough better to reopen, we'll see what people think.
13h
reviewed Approve Einstein's mass-energy equivalence
16h
reviewed Approve What is the limit for the size of a galaxy?
1d
comment Using the optical theorem to calculate the imaginary part of a loop diagram
I didn't imply that - at least I didn't mean to, but sorry if I did. I was just explaining how the ideal question-asking process works, in general, not describing what I thought you did in this specific case.
1d
comment Using the optical theorem to calculate the imaginary part of a loop diagram
That one question is probably too broad. There are chapters of textbooks written about it. (That's also a criterion for a question not to be acceptable here, i.e. if it's too broad.) If you've done prior research, that's great, but if the research leads you to an approach, you should try that approach, and if you run into trouble, then you post a question about the thing you ran into trouble on. Don't just ask if what you found is going to work. So in this case, your question about $\mathrm{d}\Pi$ are a pretty good one for this site on its own.
1d
comment Using the optical theorem to calculate the imaginary part of a loop diagram
Hi calavicci - on this site each post should have one question, or at least a few closely related questions, so I've removed the other questions from your post. You can post them separately if you like (although questions that just as "is this right?" tend not to be well received here).
1d
revised Using the optical theorem to calculate the imaginary part of a loop diagram
remove extra questions
1d
comment Are the particle-wave duality and the quantum uncertainty principle united?
@Danu a question shouldn't be closed as a duplicate of another question just because the other question's answer happens to address the first question.
1d
revised Does a nonzero Poynting vector mean that there is propagation of energy?
improve wording
1d
comment Does a nonzero Poynting vector mean that there is propagation of energy?
@JánLalinský I'll see if I can improve the wording. But by way of a counterpoint, consider the energy density depicted in this image. What would be the direction of propagation?
1d
comment Engravings in “Wandering the Immeasurable” sculpture outside the CERN globe?
@tpg2114 no argument that it's looking for a very specific reference that only physicists would know about, but is it about physics? I don't think so, and therefore I consider it off topic.
2d
answered movement of particles in electric field
2d
comment Help a layperson out here
Hi Brian, and welcome to Physics Stack Exchange! I'm closing this as unclear because the thing that is not clear is what about this question is physics. As @ACuriousMind pointed out, QM has nothing to say about simulations. (I would also mention that, while there is no required level of physics knowledge to participate, this site is not targeted at laypeople.)
2d
comment How can I add a sound wave on top of an existing one, without harming the original's loudness?
I think this is off topic here, but if so we could migrate it to Signal Processing.
Mar
26
awarded  Enlightened
Mar
26
awarded  Nice Answer
Mar
26
comment What is the center of Earth's landmass?
if that's meant to be an argument that the question is about physics, it's a remarkably weak one; in any case, this is probably a geology question.