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Dec
19
comment Is neutron-neutron fusion viable?
But in any case, I expect much lower rate than, let say, n+p->d because n+n reaction needs to go through weak channel.
Dec
19
comment Is neutron-neutron fusion viable?
Two neutrons don't posses bound state, so one of those need to undergo "isospin flip" - that is n + n -> d + e + v. It is not forbidden from energy conservation point of view (you get an ~1/2 MeV from n -> p + e + v conversion and extra 2Mev from p+n->d) but I really didn't ever work this out, so I don't know is it possible.
Oct
31
comment The gravitation field of a “Kerr-Newman electron”?
Can you write down this state that will measure +y and +z with certanty?
Aug
18
comment Is special relativity true?
I agree with Hritik Narayan, you really should read through. I also didn't know about this failed attempt, who knows did Einstein fainted when he saw it, like Sheldon?
Jan
5
awarded  Commentator
Jan
5
comment Can “particle” waves break as ocean waves do?
I think @Floris gets it right, wave breaking is a nonlinear effect. One can look at time dependent solutions like scattering gaussian on potential barrier (ncnr.nist.gov/staff/dimeo/idlprograms/se_sim_6_frames.png) but thats about as close to breaking as you'll get.
Nov
23
awarded  Critic
Nov
22
revised What is the most agreed upon quantum mechanical equation of motion?
corrected spelling
Nov
22
suggested approved edit on What is the most agreed upon quantum mechanical equation of motion?
Sep
24
awarded  Autobiographer
Mar
10
answered Constructing an orbital trajectory that quickly returns to its origin
Jan
18
comment Does chaos theory occur in quantum mechanics? Or in any non-newtonian physics?
Chaos occurs in quantum physics and it does so in a very rich way. May I suggest a free web book "Classical and Quantum Chaos" by Cvitanović et al.. I've enjoyed it very much!
Dec
30
awarded  Citizen Patrol
Dec
30
answered Why can't a spaceship accelerate for ever? Since there is no friction in space
Jun
10
comment What is the most distant object from the Earth that a spacecraft has visited to date?
+1 from me too, by Vit's reasoning!
May
20
comment Why quantum states are classified using only conserved quantities?
Very well written!
Apr
22
awarded  Benefactor
Apr
22
comment Interacting system and relaxation times
Thank your for your answers. I did some reading and noticed that situation that I described is analog of Fermi's golden rule: like interaction of atoms and photon gas - photons thermalise in much shorter times than what it takes to change the number of excited atoms significantly and such change can't kick photon gas out of equilibrium. It is much harder to see how to devise analog of FGR in my situation, but at least this conversation started me thinking. Thank you, sir, you deserve this bounty.
Apr
21
comment Interacting system and relaxation times
thank you for your answer. I'm still thinking my strategy on this, so your input is welcomed. Would you care to elaborate why don't you think my original approach is wise? Thanks!!
Apr
19
awarded  Promoter