Search results

  1. T

    Good introduction for dirac notation

    I always liked the introduction by Shankar in the first chapter of his book ("Principles of Quantum Mechanics"). It requires very little prior knowledge and is quite pedagogical.
  2. T

    What is the best way to search for research papers?

    Web of knowledge automatically indexes all papers from journals like Physical Review, but it can take a month or two to show up. As mfb says, arXiv only contains papers that the author decides to upload there. However, in many fields, almost all authors upload almost all their work there...
  3. T

    ArXiv and academic affiliation

    I don't actually know the answer to your question, but I've never read anything about an institutional affiliation being required, and I doubt it is. They will require an endorsement of your paper if you don't have an academic e-mail address, but it sounds like you have that covered. If I were...
  4. T

    French teacher needs help

    This may have been intended as a joke, but I have found that Wikipedia can be an excellent source for this purpose. If you go to the French wikipedia page for a particular word or concept, it is connected to the English equivalent. Just go to the French page and click "English" under the menu...
  5. T

    Lists of Conferences and Workshops

    You can try SPIRES too:
  6. T

    How do you organize academic papers?

    You may want to check out software such as Zotero (or these other alternatives).
  7. T

    Schools Graduate school decision, I need help!

    Good point. Upon closer look, the people at Yale don't seem to be very active lately. I agree that rankings in general should be taken with a grain of salt, but that ranking is specifically for graduate programs in nuclear physics. As far as rankings go, that's the most relevant one for...
  8. T

    Schools Graduate school decision, I need help!

    I admit that I didn't really investigate the individual researchers before I responded to the OP, but that's quite a statement. Can you elaborate on what is supposed to be so obvious...
  9. T

    Schools Graduate school decision, I need help!

    I don't think "brand name" is an issue of any consequence, although the available researchers can be important. It looks like the nuclear theorists at each of those schools work in very different fields, so depending on what you mean by being "interested in nuclear theory", that could be an...
  10. T

    Consolidating arxiv papers

    I don't think there's a way to alter any search results, but if you have all your papers associated with your arXiv account as Vanadium describes, there will be a public author identifier that you can give out that will list all your papers. See
  11. T

    Discouraged by marks, quit while I can?Thanks

    Just for the record, I know from personal experience that it is possible to fall short of every single one of those criteria and still be admitted to a top physics graduate program.
  12. T

    E=m*c 2 or

    It's just a choice of units, and indeed it is quite common to use a set of units (" [Broken]) where c=1. In that case, for a zero momentum particle, one indeed has the relation E=m.
  13. T

    Learn quantum physics at home video lectures by V. Balakrishnan of I.I.T. Madras

    A google search turns up this:
  14. T

    Why do electrons not spontaneously split into neutrino/anti-neutrino pairs?

    Sorry, I wasn't trying to derail the thread. I was actually just wondering if you could recommend a good reference.
  15. T

    Standard Model calculation of the rest energy of a proton

    I hope you have access to a big computer.
  16. T

    Why do electrons not spontaneously split into neutrino/anti-neutrino pairs?

    Out of curiosity, do you have a good source for this that I can read? A quick google search indicates that, contrary to my previous understanding, sphaleron processes could possibly cause a violation of baryon and lepton number, but the first papers I came across seem speculative about whether...
  17. T

    Pressure of an ideal gas

    Sorry, that's all I can say at the moment. The equation doesn't look familiar at a glance and I have no time to investigate or think about it further (I really should be getting work done right now). Hopefully someone else can help.
  18. T

    Pressure of an ideal gas

    An ideal gas is defined to have no interactions between particles. That's how relations like P=NkT/V are derived. Interactions will change these relations from their ideal gas values.
  19. T

    Schools Question about grad school open house

    I second everything eri said. Especially make sure to talk to current students to try to get a general feel for what it's like to be a student there. Some additional questions: If you'll be teaching when you start (or at any point), ask how many hours per week of teaching to TAs have to put...
  20. T

    Temperature question

    I'm not the OP, but there are a number of journal references listed on the Wikipedia page, mostly from the "American Journal of Physics" and "Physics Education", with a review in "Physics World": I believe these journals are peer reviewed, but...
  21. T

    How many pure numbers relate to elementary particles?

    Thanks for the corrections. You're right on all counts. I was on the right track at least, though, right? :)
  22. T

    How many pure numbers relate to elementary particles?

    Like maverick_starstrider, I'm not sure what exactly you mean by pure numbers, but let's assume you mean free parameters in the standard model of particle physics. See the table" Besides the fine...
  23. T

    Particles that Flock

    Wow, science journalism is frustrating. The least they could do is link to the paper (see Vanadium's link, or equivalently If I wasn't already familiar with it, I would have no idea what they were talking about. Yes, and note that these are fairly...
  24. T

    Improper Lorentz transformation

    Basically, an improper Lorentz transformation involves a spatial reflection, so the determinant of the transformation matrix has determinant -1. See
  25. T

    Mass of composite particles in a non abelian gauge theory.

    Just to expand on what genneth Vanadium said, in case you're not familiar. It actually isn't true that a theory with only massless particles is necessarily scale invariant -- the obvious example being QCD. The QCD Lagrangian is scale invariant when the masses are set to zero, and therefore (as...
  26. T

    Schools UC Schools and CA budget

    As caffenta says, most of what you mention (RA positions/salaries, research equipment, etc.) is payed for by federal grants, which will probably affect all the programs you're considering (assuming they're all in the U.S.). Actually, if the federal science budget gets cut, it's reasonable to...
  27. T

    InSPIRE - the successor of SPIRES

    Assuming you mean the citesummary, this can be found by choosing "HTML citesummary" under "Output Format". Unlike SPIRES, however, you can only find this AFTER you have made a search. So, search for an author, then when the results come, choose the citesummary format and click search again...
  28. T

    Stress tensor and viscosity relation

    It's not just a property of Newtonian fluids or local equilibrium. It's much more general than that. See page 4 of the pdf you linked to "The symmetry of the stress tensor". As he says, it has to do with local conservation of angular momentum. Unless you have something external that applies...
  29. T

    Stress tensor and viscosity relation

    That will teach me not to read through a post so quickly. Ignore what I said about that term being a divergence, and the coefficient being bulk viscosity. Indeed, what you have written is a shear stress, whose coefficient is the shear, or "first", viscosity. The rest of what I wrote...
  30. T

    Stress tensor and viscosity relation

    Why what is true? Your expression for for the stress tensor is certainly not a general expression, if that's what you mean. It just describes the contribution of bulk (a.k.a volume or second) viscosity to the stress tensor. In general there may also be non-zero shear. It my help if you gave...