# StronglyEntanglingLayer¶

Module: pennylane.templates.layers

StronglyEntanglingLayer(weights, wires, r=1, imprimitive=<class 'pennylane.ops.qubit.CNOT'>)[source]

A layer applying rotations on each qubit followed by cascades of 2-qubit entangling gates.

The 2-qubit or imprimitive gates act on each qubit $$i$$ chronologically. The second qubit for each gate is determined by $$(i+r)\mod n$$, where $$n$$ is equal to len(wires) and $$range$$ a layer hyperparameter called the range.

This is an example of two 4-qubit strongly entangling layers (ranges $$r=1$$ and $$r=2$$, respectively) with rotations $$R$$ and CNOTs as imprimitives:

Parameters: Keyword Arguments: weights (array[float]) – array of weights of shape (len(wires), 3) wires (Sequence[int]) – sequence of qubit indices that the template acts on r (int) – range of the imprimitive gates of this layer, defaults to 1 imprimitive (pennylane.ops.Operation) – two-qubit gate to use, defaults to CNOT