CN-121998121-A - Topology quantum bit reading implementation method based on scanning tunnel spectrum

CN121998121ACN 121998121 ACN121998121 ACN 121998121ACN-121998121-A

Abstract

A topology qubit reading implementation method based on a scanning tunnel spectrum is implemented through a topology qubit reading device comprising a pair of superconducting islands and superconducting quantum dots positioned between the superconducting islands, wherein the pair of superconducting islands are isolated from each other, a pair of Maastricht Treaty Rana zero energy modes exist in magnetic flux vortex in each superconducting island and at the edges of the superconducting islands, and Maastricht Treaty Rana zero energy modes at the edges of the two superconducting islands can be fused in a controlled manner at the superconducting quantum dots. The invention can ensure that the non-Abbe statistical property of Maastricht Treaty Rana zero energy mode is verified before the logic operation of the topological qubit is executed, reduce the requirement of precisely positioning the flux vortex when the topological qubit is read, and realize the controlled connection and isolation of a single or a plurality of topological qubit reading devices and the weaving area through reading the isolation area.

Inventors

JIA JINFENG
CHEN JINAN
LI GUOWEI
ZHENG HAO

Assignees

上海交通大学

Dates

Publication Date: 20260508
Application Date: 20260120

Claims (10)

1. A topological qubit reading device based on a scanning tunnel spectrum is characterized by comprising a pair of superconducting islands and superconducting quantum dots, wherein the pair of superconducting islands are arranged on a topological insulator substrate, the superconducting quantum dots are positioned between the superconducting islands, the pair of superconducting islands are isolated from each other, a pair of Maastricht Treaty susceptance zero energy modes exist in magnetic flux vortex in each superconducting island and at the edges of the superconducting islands, and Maastricht Treaty susceptance zero energy modes at the edges of the two superconducting islands can be fused in a controlled manner at the superconducting quantum dots.
2. The device of claim 1, wherein the topological insulator substrate is configured to provide a topological surface state having a uniform large area property, and an intermediate layer having a topological surface state having a uniform large area property is disposed between the topological insulator substrate and the superconducting island when the superconducting island is reacted in a vapor deposition process.
3. The device according to claim 1 or 2, wherein the area of the superconducting island is larger than the range of the Maastricht Treaty radon zero-energy mode wave function spatial distribution in the flux vortex and smaller than the area which allows the plurality of flux vortices to occupy, so that the existence of the superconducting island edge Maastricht Treaty radon zero-energy mode is ensured while avoiding the occurrence of multiple flux vortex states by preventing the superconducting island edge Maastricht Treaty radon zero-energy mode from being coupled with the Maastricht Treaty radon zero-energy mode in the flux vortex.
4. The device of claim 1, wherein the superconducting quantum dots have a charge energy greater than their superconducting energy gap to produce a charge-dependent superconducting ground state parity distinguishable by the scan tunnel spectrum.
5. The topological qubit reading assembly is characterized by comprising a plurality of pairs of topological qubit reading devices according to any one of claims 1-4, wherein each pair of topological qubit reading devices is connected through a braiding area, and an isolation area is arranged between a superconducting island on each topological qubit reading device and the braiding area.
6. The assembly of claim 5 wherein the isolation region comprises a superconducting layer on the topological insulator substrate and connected to the superconducting island, an insulating layer and a heating layer disposed outside the superconducting layer for superconducting suppression, wherein the superconductivity of the isolation region is suppressed to avoid coupling between Maastricht Treaty and other Maastricht Treaty modes of the read-out device of the read-out isolation region when the topological qubit is initialized or read-out, and wherein the superconductivity of the isolation region is restored to provide Maastricht Treaty access to the read-out device of the read-out isolation region when the Maastricht Treaty mode of the read-out device is moved out of the read-out device after the topological qubit is initialized or Maastricht Treaty mode of the read-out device is woven.
7. A scanning tunnel spectrum-based application based on the device according to any one of claims 1-4, which is characterized by comprising a topological qubit initialization stage and a topological qubit reading stage, wherein the scanning tunnel spectrum which is dependent on charge parity and is caused by fusion of edge Maastricht Treaty and a Rana zero energy mode at superconducting quantum dots is detected, so that the non-Abbe statistical characteristic of Maastricht Treaty Rana zero energy mode is effectively verified, and the robustness of a topological qucalculation process to disorder and decoherence is ensured.
8. The application of claim 7, wherein the topology qubit initialization stage specifically comprises: A. Applying a voltage pulse to the superconducting quantum dots through the needle points of the scanning tunneling microscope to initialize the charge states of the superconducting quantum dots; B. Inducing Maastricht Treaty Rana zero energy modes at the edges of two superconducting islands through a magnetic field, fusing the superconducting quantum dots, verifying non-Abbe statistical characteristics through scanning tunnel spectrums, and then decoupling the non-Abbe statistical characteristics; the topology qubit reading stage specifically comprises the following steps: C. After Maastricht Treaty in the magnetic flux vortex can leave the reading device and enter the braiding area, initializing the charge state of the superconducting quantum dots again; D. After Maastricht Treaty and the susceptance zero energy modes in the magnetic flux vortex are woven and respectively moved back into the superconducting island from the woven area, the fringe Maastricht Treaty susceptance zero energy modes are fused at the superconducting quantum dots, and the state of the topological qubit is read through scanning the tunnel spectrum.
9. The use of claim 8, wherein the voltage pulse has a magnitude and width that is sufficient to initialize the charge state of the superconducting quantum dot to a determined odd or even charge state without disrupting the crystal structure and geometry of the superconducting quantum dot.
10. The use of claim 8, wherein the scan tunnel spectrum relies on charge parity results from Maastricht Treaty rana zero energy mode fusion to verify abbe statistics and characterize the state of topological qubits.

Description

Topology quantum bit reading implementation method based on scanning tunnel spectrum Technical Field The invention relates to a technology in the field of topological quanta, in particular to a method for reading topological quanta bits based on a scanning tunnel spectrum. Background The core problems in implementing topological quantum computation include determining Maastricht Treaty non-Abbe statistics of the Rana zero energy mode (MZM) and reading the state of the topological qubit. In the prior art, a rapid radio frequency circuit is used for realizing the reading of parity check in Maastricht Treaty Law nanowires based on capacitance measurement, but the method is difficult to distinguish a Maastricht Treaty Law zero energy mode of topology from an Anderoff constraint state of non-topology, and the non-Abbe statistical characteristics still need to be further verified. The existing technology for weaving non-Abelian anyons through a magnetic field array is difficult to accurately control the control position during reading, so that calculation errors are large. Disclosure of Invention Aiming at the defects in the prior art, the invention provides a method for realizing the reading of topological qubits based on a scanning tunnel spectrum, which can ensure that the non-Abbe statistical characteristic of a Maastricht Treaty Lana zero energy mode is verified before the logic operation of the topological qubits is executed, reduce the requirement of precisely positioning flux vortex during the reading of the topological qubits and realize the controlled connection and isolation of a single or a plurality of topological qubit reading devices and a weaving area through a reading isolation area. The invention is realized by the following technical scheme: The invention relates to a topological qubit reading device based on a scanning tunnel spectrum, which comprises a pair of superconducting islands and superconducting quantum dots positioned between the superconducting islands, wherein the pair of superconducting islands are mutually isolated, a pair of Maastricht Treaty Rana zero energy modes exist in magnetic flux vortex in each superconducting island and at the edges of the superconducting islands, and Maastricht Treaty Rana zero energy modes at the edges of the two superconducting islands can be fused in a controlled manner at the superconducting quantum dots. The topological insulator substrate is used for providing a topological surface state with large area and uniform properties, and is preferably made of a three-dimensional topological insulator material. When the topological insulator substrate and the superconductive island react in the evaporation process, an intermediate layer with a topological surface state with large area and uniform property is preferably arranged between the topological insulator substrate and the superconductive island. The area of the superconducting island is larger than the range of Maastricht Treaty susceptance zero-energy mode wave function spatial distribution in the magnetic flux vortex and smaller than the area which allows a plurality of magnetic flux vortices to occupy, so that the phenomenon of multiple magnetic flux vortex states is avoided while the susceptance island edge Maastricht Treaty susceptance zero-energy mode is not coupled with the Maastricht Treaty susceptance zero-energy mode in the magnetic flux vortex in the interior of the superconducting island edge Maastricht Treaty susceptance zero-energy mode, and the existence of the susceptance island edge Maastricht Treaty susceptance zero-energy mode is ensured. The charge energy of the superconducting quantum dots is larger than the superconducting energy gaps of the superconducting quantum dots so as to generate charge-dependent superconducting ground state parity which can be distinguished by a scanning tunnel spectrum. The superconducting quantum dots and the superconducting islands are made of superconducting materials. The invention relates to a topological qubit reading assembly which comprises a plurality of pairs of topological qubit reading devices, wherein each pair of topological qubit reading devices is connected through a braiding area, and an isolation area is arranged between a superconducting island on each topological qubit reading device and the braiding area. The isolation region comprises a superconducting layer, an insulating layer and a heating layer, wherein the superconducting layer is arranged on a topological insulator substrate and connected with a superconducting island, the insulating layer and the heating layer are arranged outside the superconducting layer and used for superconducting inhibition, when a topological qubit is initialized or read, the superconductivity of the read isolation region is inhibited so as to avoid coupling between Maastricht Treaty and other Maastricht Treaty of a read zero energy mode of a topological qubit reading device, namely the read isolat