Mølmer-Sørensen Algorithm

The VariableMSXXAlgorithm is similar to the CNOTAlgorithm, and only differs in the implementation of the two-qubit gates. While the CNOTAlgorithm treats two-qubit and multi-qubit gates equally, the VariableMSXXAlgorithm implements two-qubit gates using the VariableMSXX gate (i.e. $R_{XX}(\theta )$ ) and basis rotations if needed.

For example, the term $e^{-it{Z}_0{Y}_1}$ is implemented as