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Homework Help: Identical spin 1/2 particles in a box.

  1. Jun 2, 2012 #1
    1. The problem statement, all variables and given/known data
    two identical particles of spin 1/2 that confined in a cubical box of side L. find the energy and wave function (non-interacting between particles)

    2. Relevant equations
    for a cubic boxby and reducing the Schrodinger equation:
    ψ(x,y,z)=√(8/L3 ) sin((nx πx)/L)sin((ny πy)/L)sin((nz πz)/L)
    E= (ħ2 π2)/(2mL2 ) (nx2+ny2+nz2 )

    3. The attempt at a solution

    E=ε12=(ħ2 π2)/(2mL2 ) [(n_x12+n_y12+n_z12 )+(n_x22+n_y22+n_z22 ) ]
    n how about the wave function? should i find it anti-symmetry wave funtion?
    then the wave function is combination of this?
    Last edited: Jun 2, 2012
  2. jcsd
  3. Jun 3, 2012 #2


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    I think you have the basic idea. You need to find the combinations that result in an antisymmetric wave function. If you meant to say that ψs(r1,r2)χa(S1,S2)=ψa(r1,r2)χs(S1,S2), however, that's obviously wrong.
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