added core code, README, and testing scripts

[strong_simulation_stabilizer_rank.git] / test2.bash

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+#!/bin/bash
+# simple Bash diagnostic script to check if non-zero relative error stabilizer rank code works
+
+# choose the number of qubits and T gates on those qubits
+# NOTE: numqubits must be a multiple of your gauss sum tensor multiple!
+# e.g. if you test gausssums_multipleof6 then numqubits=6*n for some integer n
+numqubits=6
+numTgates=6
+# choose the number of commuting Pauli measurements you want to generate in each run
+# (note: can't be greater than $numqubits)
+numPaulis=6
+
+# number of random stabilizer states to use for stochastic sampling
+numsamples=1000
+
+# since this is a stochastic calculation, we need a threshold to determine when the calculation is withing close enough relative error 
+threshold=0.005 # absolute value threshold difference between computed and exact value
+
+numruns=20
+
+echo "Starting test of $numruns random $numqubits-Pauli expectation values calculated by averaging $numsamples random stabilizer states and comparing to threshold $threshold..."
+
+for i in $(seq 1 $numruns)
+do
+# sleep for 1 second for the pseudorandom number generator
+sleep 1; a=$(stdbuf -oL ./randominputcommutingHermitianPauli2 $numqubits $numTgates $numPaulis > inputPauli.txt && ./strongsim_relerr $numsamples < inputPauli.txt | tail -1)
+b=$(stdbuf -oL ./multipauli < inputPauli.txt | tail -n1)
+are=$(echo "$a" | cut -f 1 -d " " | cut -c 1-5);
+aim=$(echo "$a" | cut -f 3 -d " " | cut -c 1-5); aimsign=$(echo $a | cut -f 2 -d " "); bimsign=$(echo $a | cut -f 2 -d " ");
+bre=$(echo "$b" | cut -f 1 -d " " | cut -c 1-5);
+bim=$(echo "$b" | cut -f 3 -d " " | cut -c 1-5); echo "$i: $are $aimsign $aim and $bre $bimsign $bim"
+rediff=$( printf 'sqrt((%f - %f)^2)\n' "$are" "$bre" | bc -l )
+imdiff=$( printf 'sqrt((%f - %f)^2)\n' "$aim" "$bim" | bc -l )
+if (( $(echo "$rediff < $threshold" |bc -l) )) && (( $(echo "$imdiff < $threshold" |bc -l) )) && [ "$aimsign" == "$bimsign" ]
+then
+    continue
+  else
+    echo "NOT EQUAL!"
+    break
+fi
+done
+echo "Test passed!"