Quote about the coloring of Fig.3.b):
I would also like to color my entanglement spectrum in this way. However, when I come to look at the charges for each spectrum entry, I see two qnumbers (for my infinite-cylinder square-lattice Hubbard model). My question is: which one do I take? Do I just take the first value? Or some superposition of the two? What is the interpretation of having multiple charges (qnumber>1)? What does each charge correspond to?The entanglement spectrum can be resolved further into distinct \(U(1)\) charge sectors \(Q_{\alpha}^L\in \mathbb{Z}\) where \(Q_{\alpha}^L\) label the \(U(1)\) charges of the left Schmidt states.
Did the authors of this paper only have qnumber=1, which allowed them to color the plot in this way?
The TeNPy documentation (which is very informative about charges ) mainly talks about one charge corresponding to each index, so I would be grateful for any further clarification!