Demonstration of a c-not gate using electromagnetically induced transparency

We present recent results demonstrating a controlled-NOT gate based on electromagnetically induced transparency (EIT), originally proposed by M\"{u}ller \emph{et al.}. The scheme relies on the strong long-range interactions between Rydberg atoms which, through Rydberg blockade, facilitates conditional transfer between target atomic qubits dependent on the initial state of a control atom. We have achieved a gate fidelity $F \geq 0.82$ and have demonstrated Bell state entanglement by measuring parity oscillations. This method has the potential to be scaled to multiple qubits gates without a change in pulse area providing a route to create useful entangled states for high-precision measurements beyond the standard quantum limit without error correction.