Hi,all I am always wondering if I defined the quantum numbers of the fermion site basis in the following way, would there be a negative Ndown number (for example, with N=0, Nup=1)? <QUANTUMNUMBER name="N" min="0" max="2"/> <QUANTUMNUMBER name="Nup" min="0" max="1"/> <QUANTUMNUMBER name="Ndown" min="N-Nup" max="N-Nup"/> Bo-Nan -- Stay foolish,Stay hungry.
On Mar 13, 2013, at 7:39, Bo-Nan JIANG <bonanjiang@gmail.com> wrote:
Hi,all I am always wondering if I defined the quantum numbers of the fermion site basis in the following way, would there be a negative Ndown number (for example, with N=0, Nup=1)?
<QUANTUMNUMBER name="N" min="0" max="2"/> <QUANTUMNUMBER name="Nup" min="0" max="1"/> <QUANTUMNUMBER name="Ndown" min="N-Nup" max="N-Nup"/>
yes
participants (2)
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Bo-Nan JIANG
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Matthias Troyer