A gate for a Quantum Computer Rn^(θ)=e−iθ2(n^⋅σ⃗)R_{\hat n}(\theta) = e^{-i\frac{\theta}{2}(\hat n \cdot \vec{\sigma})}Rn^(θ)=e−i2θ(n^⋅σ) this is a general Qubit Unitary EvolutionQuantum Gate Swap