Method, device, equipment and storage medium for determining quantum step of Josephson junction

Abstract

The present application relates to a method, a device, a device and a storage medium for determining a Josephson junction quantum step. The method includes: obtaining the voltage value sequence of the Josephson junction array at the target frequency; wherein, the target frequency is the frequency of microwave irradiation corresponding to the Josephson junction array; and determining the three voltage values ​​with the highest frequency in the voltage value sequence Three target steps corresponding to the Josephson junction quantum step; scan within the preset range centered on the target step to obtain the target voltage value and corresponding target current value; determine the Josephson junction quantum step according to the target voltage value The step position of the step determines the step width of the Josephson junction quantum step according to the target current value. Therefore, without determining whether there is a Josephson junction in a superconducting short-circuit state in the Josephson junction array, and without determining the exact number of Josephson junctions, the step position and step width of the quantum steps of the Josephson junction array can be determined.

Description

technical field [0001] The present application relates to the field of electronic information technology, in particular to a method, device, equipment and storage medium for determining quantum steps of Josephson junction arrays. Background technique [0002] A Josephson voltage reference is a metrological reference that reproduces voltage magnitudes based on the Josephson effect. Usually, the step position and step width of the Josephson junction array quantum voltage platform are related to the corresponding microwave irradiation frequency and the number of knots in the Josephson junction array. Therefore, different microwave irradiation frequencies and different knot numbers generally correspond to different Step location and step width. The traditional method for determining the step position and step width of the Josephson junction array is to calculate the step position and step width according to the determined microwave irradiation frequency and the number of Joseph...

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Problems solved by technology

[0003] However, when there is a Josephson junction in the superconducting short-circuit state in the Josephson junction array, the Josephson junction can be regarded as not existing. Therefore, it is impossible to determine the number of useful Josephson junctions. Using traditional methods, it is impossible to determine the Josephson junction Step position and step width of array quantum steps

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