A Fault-tolerant, Ion-trap-based Architecture for the Quantum Simulation Algorithm

Efficient simulation of quantum mechanical systems is an important application of quantum computing. We build a fault-tolerant, ion-trap-based architecture for the quantum simulation algorithm, using the quantum CAD flow developed at Berkeley. First, we develop a software that, given the description of a quantum simulation problem, generates the solution circuit and optimizes it by using a layering technique to increase its parallelism and reduce its latency. This optimized circuit is then inputted into the quantum CAD flow. Second, we improve the datapath synthesis and mapping stages of the quantum CAD flow, by reducing the number of long-range communications. Third, we present a new version of selective error correction scheme which distinguishes between bit-flip errors and phase-flip errors and has a better estimation of error propagation than its predecessor. At last, we evaluate our design with the ADCR metric, and exhibit the effectiveness of our optimizations.