Hello, all
I use "fulldiag" to diagonalize my hamiltonian. Because in my problem Sz is not a conserved quantum number, so when I try to use "fulldiag_evaluate" to treat my output xml file, I cannot get uniform_susceptibility file. In order to get the uniform_susceptibility curve, I can probably introduce magnetic field, and change the magnitude of magnetic field, measure the magnetization, see how M changes with h, and use \Delta{M} / \Delta{h} to find chi. Besides this tedious way, is there any other thing I can try in ALPS?
Thanks, Gang
On 2 Oct 2007, at 03:00, GANG CHEN wrote:
Hello, all
I use "fulldiag" to diagonalize my hamiltonian. Because in my problem Sz is not a conserved quantum number, so when I try to use "fulldiag_evaluate" to treat my output xml file, I cannot get uniform_susceptibility file. In order to get the uniform_susceptibility curve, I can probably introduce magnetic field, and change the magnitude of magnetic field, measure the magnetization, see how M changes with h, and use \Delta{M} / \Delta {h} to find chi. Besides this tedious way, is there any other thing I can try in ALPS?
Not as far as I can see, since when Sz is not conserved the susceptibiliry cannot easily be computes from (<Sz^2>-<Sz>^2)/T
Matthias
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