Method, system and medium for realizing active shimming and quantum computing

Abstract

The invention discloses a method, a system and a medium for realizing active shimming and quantum calculation based on a built-in single sample. A sample for quantum calculation is built in a nuclear magnetic resonance probe, the sample is not replaced, and the same sample is used for active shimming (adjusting current in each order shimming coil) and quantum calculation. According to the treatment scheme, a small amount of samples are sealed in the nuclear magnetic resonance probe, so that the probe can be completely sealed, noise which is received from the surrounding space and has the same frequency as a nuclear magnetic signal is reduced, and the signal-to-noise ratio is improved. More importantly, the transfer of heat between the room temperature and the magnet heat preservation cavity through the sample test tube is cut off, so that the influence of room temperature fluctuation on the temperature control of the magnet can be greatly reduced, a very uniform and stable magnetic field is further obtained, and the problem that when a permanent magnet is used as a magnetic field source, the temperature of the magnet is not stable due to replacement of the sample test tube and the part of the sample test tube is left outside the probe, and then shimming and spectral resolution reduction are caused are avoided.

Description

technical field [0001] The invention relates to the technical field of quantum computers, in particular to a method, system and medium for realizing active shimming and quantum computing based on a built-in single sample. Background technique [0002] Quantum computer is a kind of physical device that follows the laws of quantum mechanics to perform high-speed mathematical and logical operations, store and process quantum information. The nuclear magnetic resonance (NMR) quantum computing system can realize rich quantum computing algorithms at normal temperature and pressure, has mature radio frequency measurement and control technology, and has simple experimental conditions. The premise of nuclear magnetic resonance is that the magnetic nucleus needs to be excited by the radio frequency electromagnetic wave with the same transition frequency under a uniform static magnetic field to generate a resonance phenomenon, and the receiving coil can receive the induction attenuatio...

AI Technical Summary

Problems solved by technology

In the case of using a permanent magnet as the magnetic field source, changing the sample tube and leaving part of the sample tube outside the probe can lead to instability in the temperature of the magnet, resulting in a loss of shimming and spectral resolution

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