Definition
Quantum error correction is a technique employed in quantum technology to safeguard data against errors resulting from disturbances and noise. In this case, disturbances and noise refer to annoying encounters and surrounding elements that may impact the bits of information known as qubits, resulting in miscalculations.
Quantum computers use quantum error correction to guarantee accurate and reliable calculations. They may execute complex calculations without any significant effect from errors of interference.
How Quantum Error Correction Functions
- Quantum information is programmed with extra qubits to improve durability.
- A suite of procedures called ‘error detection codes’ is injected in the encrypted qubits to detect errors. These codes identify flaws without measuring the encoded information directly, hence maintaining the quantum state.
- Specific measurements are done on the encoded qubits to yield a ‘syndrome,’ i.e., details about the existence and locality of errors.
- The discovered errors are corrected and their effects are reversed based on the gathered information.
- After correcting errors, the encoded qubits may be measured to obtain the ultimate corrected quantum details. The error correction and redundant encoding ensure that the original information is accurately recovered, even in the presence of errors.