Skip to main content

ZZNN

ZZNN(const List<integer> sites) -> OperatorNamed​

Returns a spin-1/2 OperatorNamed for ∑i∈sitesZi⊗Zi+1 \sum_{i \in \text{sites}} Z_i \otimes Z_{i+1} operator.

Parameters​

  • sites: Vector of site indices where the operator acts (minimum 2 sites).

Example​

var zznn_s = ZZNN([0, 1])     // Minimum sites: use brackets (vector format)  
var zznn_m = ZZNN([0, 1, 2, 3])  
// ZZNN(0, 1) would be INVALID - missing brackets