Recent content by JamesHG

  1. J

    Undergrad Identical Particle States in a Unidimensional Box

    I have an "unidimensional" box with two identical particles in. My question is , Does it matter in which total spin state is my total function? I mean , if it is a singlet or triplet , one is antisymmetrical and the other is symmetrical, but I only integrate the function in the spatial...
  2. J

    Undergrad Taylor expansions and integration.

    I have a short doubt: Let f(x) be a fuction that can't be integrated in an analytical way . Is anything wrong if I expand it in a Taylor' series around a point and use this expansion to get the value of the definite integral of the function around that point? Suppose that the interval between...
    • JamesHG
    • Thread
    • Definite integral Integral calculus Integration Taylor Taylor expansion
    • Replies: 1
    • Forum: Calculus
  3. J

    Undergrad First excited state of Helium. Triplets and Singlet

    Thank you so much for answering my question!
  4. J

    Undergrad First excited state of Helium. Triplets and Singlet

    My question is the following one: If i have the first excited state of helium, the possibilities for the two electrons are : 1s+,2s+ , 1s+2s-, 1s-,2s- and 1s-,2s+ , where + and - denotes spin up and down. If I use the slater's determinant to generate antisymmetric states, I get : $$|u1> =...