Get Title Quantum Error Correction - Dtic

Quantum error correction protects information by encoding it across multiple physical qubits to form a “logical qubit,” and is believed to be the only way to produce a large-scale quantum computer with error rates low enough for useful calculations.

Quantum error correction becomes practically realizable once the physical error rate is below a threshold value that depends on the choice of quantum code, syndrome measurement circuit and decoding algorithm5.

The Google Quantum AI team has made an important step towards the development of a large-scale useful quantum computer. This breakthrough is the first demonstration of a logical qubit prototype, showing that it's possible to reduce errors by increasing the number of qubits in a scheme known as quantum error correction.

Quantum error correction becomes practically realizable once the physical error rate is below a threshold value that depends on the choice of quantum code, syndrome measurement circuit and decoding algorithm5.

1. International Business Machines Corporation (IBM)

Nord Quantique, a quantum computing startup, has become the first company to demonstrate quantum error correction at the individual qubit level, improving qubit coherence lifetime by 14% without using additional physical qubits.

When comparing Error Mitigation vs. Quantum Error Correction, the major differences between the two are: QEC refers to error detection and correction during the execution of the algorithm, whereas EM compensates for errors after execution has been completed and after measurement results have been returned.

Quantum error correction is theorised as essential to achieve fault tolerant quantum computing that can reduce the effects of noise on stored quantum information, faulty quantum gates, faulty quantum preparation, and faulty measurements.