2 # simple Bash diagnostic script to check if non-zero relative error stabilizer rank code works
4 # choose the number of qubits and T gates on those qubits
5 # NOTE: numqubits must be a multiple of your gauss sum tensor multiple!
6 # e.g. if you test gausssums_multipleof6 then numqubits=6*n for some integer n
9 # choose the number of commuting Pauli measurements you want to generate in each run
10 # (note: can't be greater than $numqubits)
13 # number of random stabilizer states to use for stochastic sampling
16 # since this is a stochastic calculation, we need a threshold to determine when the calculation is withing close enough relative error
17 threshold=0.005 # absolute value threshold difference between computed and exact value
21 echo "Starting test of $numruns random $numqubits-Pauli expectation values calculated by averaging $numsamples random stabilizer states and comparing to threshold $threshold..."
23 for i in $(seq 1 $numruns)
25 # sleep for 1 second for the pseudorandom number generator
26 sleep 1; a=$(stdbuf -oL ./randominputcommutingHermitianPauli2 $numqubits $numTgates $numPaulis > inputPauli.txt && ./strongsim_relerr $numsamples < inputPauli.txt | tail -1)
27 b=$(stdbuf -oL ./multipauli < inputPauli.txt | tail -n1)
28 are=$(echo "$a" | cut -f 1 -d " " | cut -c 1-5);
29 aim=$(echo "$a" | cut -f 3 -d " " | cut -c 1-5); aimsign=$(echo $a | cut -f 2 -d " "); bimsign=$(echo $a | cut -f 2 -d " ");
30 bre=$(echo "$b" | cut -f 1 -d " " | cut -c 1-5);
31 bim=$(echo "$b" | cut -f 3 -d " " | cut -c 1-5); echo "$i: $are $aimsign $aim and $bre $bimsign $bim"
32 rediff=$( printf 'sqrt((%f - %f)^2)\n' "$are" "$bre" | bc -l )
33 imdiff=$( printf 'sqrt((%f - %f)^2)\n' "$aim" "$bim" | bc -l )
34 if (( $(echo "$rediff < $threshold" |bc -l) )) && (( $(echo "$imdiff < $threshold" |bc -l) )) && [ "$aimsign" == "$bimsign" ]