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ZZNNN

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

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

Parameters​

  • sites: Vector of site indices where the operator acts (minimum 3 sites).

Example​

var zznnn_s = ZZNNN([0, 1, 2])     //  use brackets (vector format)  
var zznnn_m = ZZNNN([0, 1, 2, 3, 4])  
// ZZNNN(0, 1, 2) would be INVALID - missing brackets