Quantum error correction code preparation method oriented to fault-tolerant blind quantum computing

Abstract

The invention discloses a quantum error correction code preparation method oriented to fault-tolerant blind quantum computing, which reduces the dependence of Alice preparation of error correction codes on quanta, and belongs to the technical field of quantum computing. The method comprises the following steps: S1, Alice transmitting N random weak coherent optical pulses and an auxiliary pulse sequence with a known quantum state to Bob through a quantum channel; S2, Bob preparing an unknown state required by Alice by using a random weak coherent light pulse according to a remote blind preparation quantum bit protocol, and entangling the unknown state with a quantum state in a known auxiliary pulse to create a multi-particle entangled graph in a two-dimensional plane, namely a brickwork state; and S3, Alice guiding Bob to carry out measurement-based quantum calculation on the graphic state brickwork state through the measurement angle, and preparing a required quantum error correction code. The Alice does not need a quantum memory and quantum computation, and does not need to be prepared, so that the expenditure of the Alice for the quantum aspect is greatly reduced, and the Alice is closer to a classical user.

Description

technical field [0001] The invention relates to a quantum error-correcting code, in particular to a preparation protocol of a quantum error-correcting code oriented to error-tolerant blind quantum computing, and belongs to the technical field of quantum computing. Background technique [0002] The function of quantum error correction is to correct the wrong quantum bits (Qubits) in Universal Blind Quantum Computation (UBQC). Quantum error correction is the most concerned link in the UBQC protocol. [0003] Quantum error correction was discovered independently by Shor and Steane. Afterwards, they and Calderbank adopted the classic error correction idea to develop CSS (Calerbank-Shor-Steane) codes. Later, Gottesman invented the stable sub-system, which can be used to describe most error-correcting codes, usually called stable sub-codes. The 7-qubit Steane code is both a stable subcode and a CSS code. It is not only simple to encode but also easy to diagnose errors. It is a ...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem of how to reduce the quantum dependence of Alice's preparation of error-correcting codes in the prior art, the present invention provides a method for preparing quantum error-correcting codes oriented to error-tolerant blind quantum computing

Images