Table 1 Summary of experimental parameters

From: Certified randomness using a trapped-ion quantum processor

Label

Meaning

Value

n

Number of qubits

56

\({\mathcal{B}}\)

Cost of simulating challenge circuits

90 × 1018 FLOPS

\({\mathcal{A}}\)

Sustained peak performance of the Frontier supercomputer

0.897 × 1018 FLOPS

Time to simulate challenge circuits on the Frontier supercomputer

100.3 s

χ

Threshold for XEB test

0.3

tthreshold

Threshold for average time per sample

2.2 s

Tb,cutoff

Cutoff time for the server to respond to a batch of 2b circuits

2.5 × 2b s

M

Number of successful samples

30,010

tQC

Average response time per successful quantum sample

2.154 s

m

Number of samples used to measure XEB

1,522

XEBtest

Measured XEB

0.32