Dual-radio-frequency trapping and potential field matching method for mixed ion system

Abstract

The invention relates to a dual-radio-frequency universal trapping and potential field matching method for a mixed ion system, which belongs to the technical field of cold ion frequency standards. An ion trap dual-radio-frequency dynamic constraint model is established, an equivalent pseudo potential model, stable constraint conditions and three-dimensional correlation coupling characteristics of micro motion and long-term motion of a single-component ion system in a dual-radio-frequency potential field are quantitatively analyzed, and the critical adiabatic constraint strength of a second trapping frequency is defined by analyzing the micro motion transient process of ions. The high-frequency trapping potential frequency and amplitude of the light ions are matched, and quasi-adiabatic stable trapping of the light ions is achieved. The low-frequency trapping potential frequency of heavy ions is matched, and the resonance excitation effect and the micro-motion heating effect of low-frequency potential on light ions are effectively restrained. While heavy ion quasi-adiabatic external state control is maintained, the external state efficient synergistic effect and even vibration ground state cooling are achieved by improving the low-frequency potential field intensity and improving the space coupling intensity and the dynamic mode matching efficiency of a large mass-to-charge ratio difference mixed three-dimensional ion system.

Description

technical field [0001] The invention relates to a radio frequency confinement method for an ion system, in particular to a dual radio frequency universal confinement and potential field matching method for a mixed ion system, which belongs to the technical field of cold ion frequency standards. Background technique [0002] The realization of high stability, low heating trapping and precise quantum state manipulation of specific ion systems is the key to the development of high-performance ion clocks, the preparation of precision measurement quantum systems, the construction of high-fidelity quantum logic gates, and the development of mass spectrometers with ultra-large detection ranges. At present, ion trapping technology can achieve dynamic confinement ranging from light electrons to heavy macroscopic cluster ions. [0003] Restricted by ion trap structure, potential field parameters and other factors, the optimal trapping frequencies of different types of ions are quite d...

AI Technical Summary

Problems solved by technology

The strong repulsion potential of the light ions in the inner layer will push the heavy ions in the outer layer away from the center of the weak binding potential, and the radio frequency heating effect will further intensify, causing the ions in the outer layer to escape from the confinement area continuously, making it difficult to achieve long-term stable confinement and application

This current situation limits the application range and efficiency of collaborative cooling between heavy ions and light ions, and is also not conducive to the detection and manipulation of cooperatively cooled ions (dark ions).

[0008] 3) The current collaborative cooling application of mixed ion systems only achieves quantitative matching of modes in dual ion systems with low mass-to-charge ratio differences

For more complex ion systems, the spatial coupling strength of the mixed ion system can only be improved to a limited extent, without changing the resonance coefficient and resonance frequency of the mixed ion system, and it is difficult to achieve precise coupling matching of the modes

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