Quantum Fidelity
IntermediateQuantum Fidelity is a measure of the 'closeness' between two quantum states, often comparing an ideal state to the actual state produced by a noisy quantum computer.
In Plain English
Imagine making a photocopy of a detailed photograph. Quantum fidelity is like measuring how accurately the copy reproduces the original. A perfect, crisp copy has a fidelity of 1, while a blurry or faded one has a lower fidelity, indicating information was lost.
Why It Matters for Your Career
Quantum Hardware Engineers at companies like Rigetti or Quantinuum strive to improve fidelity. Roles in quantum benchmarking and compiler design also use this metric to assess and mitigate hardware errors, making it a common topic in technical interviews.
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