Errors are a limiting factor for running large quantum circuits. The solution to this problem is Quantum error correction, which would allow low logical error rates at the cost of qubit and running-time overheads that scale well.  These overheads are beyond the capabilities of near term quantum computers. It is therefore important to develop methods that reduce logical errors with overheads that are reasonable in the near term. 

In this talk I will present advances in  "Clifford Noise Reduction" (CliNR) , a partial quantum error correction technique which is not fault tolerant but allows us to reduce logical error rates with relatively low overheads [1]. The method uses stabilizer checks to verify Clifford circuits and reduce the logical error rates in circuits that pass verification. The gates are prepared offline and are then injected into the circuit when they pass verification. The use of offline preparation and injection allows us to restart only segments of the overall circuit of interest, limiting the overheads compared to similar techniques.  The results show promise both in the near-term and in the long-term where CliNR can be applied to error corrected logical qubits. 

[1] Low-cost noise reduction for Clifford circuits, Nicolas Delfosse and Edwin Tham.