ScholarWorks@성균관대학교

초록

We propose a fault-tolerant quantum error correction architecture consisting of a linear array of emitters and delay lines. In our scheme, a resource state for faulttolerant quantum computation is generated by letting the emitters interact with a stream of photons and their neighboring emitters. Depending on the number of emitters ne, we study the effect of delay line errors in two regimes: when ne is a small constant of order unity and when ne scales with the code distance. Between these two regimes, the logical error rate steadily decreases as ne increases, from a scaling of exp(-c eta(-1/2)) to exp(-c 'eta(-1)), where eta is the error rate per unit length in the delay line, for some constants c, c ' > 0. We also carry out a detailed study of the break-even point and the faulttolerance overhead. These studies suggest that the multi-emitter architecture, using the state-of-the-art delay lines, can be used ing other sources of errors are sufficiently small.

키워드