NextNearestNumberSum

NextNearestNumberSum(const List<integer> sites) -> OperatorFermiNamed

Returns the sum of next-nearest-neighbor number interactions $\sum_{i} n_{i} n_{i+2}$ with support on the specified sites.

Parameters

• sites: The sites where the operator acts.

Example

NextNearestNumberSum([0,1,2])*Fbit("0110") // Returns (1 + 0i)|0110>