Recent content by LAHLH

  1. L

    Where Can I Find Theoretical Postdoc Advertisements?

    yep, already done that (I think it's now known as brightrecruits.com), not much in my field unfortunately-seems to be mostly condensed matter or more experimental stuff, as I say I believe hyperspace, academicjobsonline, spires-jobs to be the best places for theory postdocs I have found. Just...
  2. L

    Where Can I Find Theoretical Postdoc Advertisements?

    I'm in the UK. Thanks for the APS career website, I will look there too, but previously this hadn't been mentioned to me. I have of course talked about this with supervisor and my primary applications are to places he has recommended, however at this stage I am trying to broaden my search also...
  3. L

    Where Can I Find Theoretical Postdoc Advertisements?

    there is also spires-jobs. Does no one else have anything?
  4. L

    Where Can I Find Theoretical Postdoc Advertisements?

    Where to people usually look for postdoc adverts? I am aware of hyperspace and academicjobsonline but are these the only places to check? (I am interested in theoretical ads, specifically gravity etc)
  5. L

    Natural Unit Confusion: M=1/L or M=T/L^2?

    must be a silly mistake anyone know where?
  6. L

    Natural Unit Confusion: M=1/L or M=T/L^2?

    Sorry that was a typo, should be L=T (from c=1). Then G=1, means M=L^3/T^2, and combinging with this L=T, gives M=L=T. But now if we want hbar=1, this implies M=T/L^2, which combing with what we learned from c=1,G=1 (such as L=T) seems to suggest M=1/L (as oppose to M=L). All my equals are...
  7. L

    Natural Unit Confusion: M=1/L or M=T/L^2?

    If we set c=G=1, then c=1 leads to L=1/T , the G=1 means that M=L^3/T^2 and combining the two means that M=L=1/T so far so good. But say if I also want \hbar=1 this seems to imply M=T/L^2 but combining this with c=1 which gave the L=1/T now suggests that M=1/L=T . Which seems...
  8. L

    Conformal inv of scalar wave equation

    So I should have really been using \bar{R}=\omega^{-2}R+2(n-1)g^{\alpha\beta}\omega^{-3}(\nabla_{\alpha}\nabla_{\beta}\omega)+(n-1)(n-4)g^{\alpha\beta}\omega^{-4}(\nabla_{\alpha}\omega)(\nabla_{\beta}\omega) for the (+----..) conv. Is my conformal transformation for the box still valid? In...
  9. L

    Conformal inv of scalar wave equation

    I'm working from the book Birrell and Davies and they have the plus sign \Box \phi +\frac{1}{4}\frac{n-2}{n-1} R \phi , they also use (+----) convention however. Actually I now realize that I've been using the transformations for the Ricci etc from Carroll who uses the opposite sign convention...
  10. L

    Conformal inv of scalar wave equation

    I'm not sure I agree with that. I do accept that you could do the problem the way you posted with that identity, and will try to verify that when I get chance next, but I don't buy that you can't do it using the covariant derivs as long as you are careful. I'm starting in the conformal frame and...
  11. L

    Conformal inv of scalar wave equation

    The identity you posted for box phi you mean? If so yes I agree that that's correct. I started off doing the calculation using this identity too but haven't finished the algebra yet. I can't see however why doing it the way I initially set out too would not be an equivalent way however, unless I...
  12. L

    Conformal inv of scalar wave equation

    where did I make this mistake? I was tring to be very conscious of not doing that. omega and phi are scalars so the \nabla_{\nu} cov deriv acts as a partial deriv and this is how I generate the second equality in my second line of equations in my post prev to yours. Or are you thinking of...
  13. L

    Conformal inv of scalar wave equation

    \bar{\Box}\bar{\phi}=\omega^{-2}\Box\bar{\phi}+(n-2)g^{\alpha\beta}\omega^{-3}(\nabla_{\alpha}\omega)(\nabla_{\beta}\bar{\phi} ) What I did was, for example in the first term of this on RHS :\omega^{-2}\Box\bar{\phi}, I wrote...
  14. L

    Conformal inv of scalar wave equation

    I didn't, I just used \bar{\Box}\bar{\phi}=\omega^{-2}\Box\bar{\phi}+(n-2)g^{\alpha\beta}\omega^{-3}(\nabla_{\alpha}\omega)(\nabla_{\beta}\bar{\phi}) and...
  15. L

    Conformal inv of scalar wave equation

    I'm trying to prove the conformal invariance (under g_{\mu\nu}\to\omega^2 g_{\mu\nu}) of \bar{\Box}{\bar{\phi}}+\frac{1}{4}\frac{n-2}{n-1}\bar{R}\bar{\phi} I've found that this equation is invariant upto a quantity proportional to...
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