For fermion systems, in addition to the symmetry sectors, the CFT spectrum (scaling dimension and conformal spin) is further divided into Neveu-Schwarz (NS) and Ramond (R) sectors, depending on whether an additional fermion twist is applied when taking the trace across the system.
How do we want to label the different sectors in the CFTData struct? The simplest solution is labelling each sector by a tuple (:NS, charge) or (:R, charge), where charge refers to the symmetry sectors.
For fermion systems, in addition to the symmetry sectors, the CFT spectrum (scaling dimension and conformal spin) is further divided into Neveu-Schwarz (NS) and Ramond (R) sectors, depending on whether an additional fermion twist is applied when taking the trace across the system.
How do we want to label the different sectors in the
CFTDatastruct? The simplest solution is labelling each sector by a tuple(:NS, charge)or(:R, charge), wherechargerefers to the symmetry sectors.