QubimiQuantum ideas made visible
047 min

Exact probabilities, sampled outcomes

Compare calculated probabilities with noisy measurement samples.

04

Understand exact simulation, sampling variation and hardware noise.

Back to all comparisons

01 · Set up the comparison

Choose a workload and scale

Understand exact simulation, sampling variation and hardware noise.

1

Workloads

Choose what kind of work to test

Workload is what the machine does; scale is how much. Choosing one loads a starting scale.

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2

Number of shots

1,000

Scaling: Quick sampleCustom scale
Few shotsMany shots

Changing the scale keeps this workload. Choose another card above to change workloads.

3

Test question

How many shots make the sample stable enough to trust?

Current setupQuick sampleNumber of shots: 1,000

02 · Compare

Result snapshot

Choose a workload and scale, then run the comparison to see the best fit and evidence.

Choose a workload and scale, then run the comparison to see the best fit and evidence.

03

Explain

Explain

CPU and GPU can calculate ideal probabilities; a QPU produces samples whose frequencies approach them as shots increase.

04

Challenge

Increase shots until both outcome bars are within the target tolerance.

Understand exact simulation, sampling variation and hardware noise.