A gravity shielding device based on topological Euler characteristic regulation and a control method thereof

Abstract

The application discloses a gravity shielding device based on topological Chern number regulation and a control method thereof. The device comprises a topological nontrivial material layer, a projection angle modulation system, a shielding cavity, a gravity field monitoring system and a feedback control system. The projection angle of the external field modulation material layer is modulated, a local gravity field anomaly is generated by using the time change rate of the projection angle, and the gravity acceleration of the target area is offset. The shielding effect is characterized, and the shielding effect can be realized through feedback control. The application can realize active shielding of static gravity at room temperature, and is suitable for fields of precision experiment gravity isolation, microgravity environment simulation, spacecraft internal gravity environment control and the like.

Description

Technical Field

[0001] This invention relates to the fields of gravity manipulation technology and topological materials technology, specifically to a gravity shielding device and its control method based on topological Chern number control. This invention can be applied to fields such as precision experimental gravity isolation, microgravity environment simulation, radiation protection, novel vibration reduction systems, and gravity environment control inside spacecraft. Background Technology

[0002] Gravity shielding has long been a goal pursued by physics and engineering. Since Einstein's theory of general relativity explained gravity as the curvature of spacetime, the active manipulation of gravity has been a major challenge for physics and engineering. Existing gravity shielding or isolation technologies mainly include the following schemes: (a) Passive vibration isolation Vibration transmission is isolated by mechanical components such as springs, air cushions, and rubber. This solution has a simple structure and low cost, but it has the following limitations: (1) It cannot shield static gravity fields and is only effective for dynamic vibrations; (2) The isolation frequency is limited and the isolation effect for low-frequency vibrations is poor; (3) It cannot achieve active control and the shielding effect is fixed. (ii) Active vibration isolation Vibration is detected and compensated in real time by sensors and actuators. This scheme has a good effect on dynamic vibration isolation, but it has the following limitations: (1) the system is complex and costly; (2) it depends on external energy and control system; (3) it cannot shield static gravity; (4) the response speed is limited by the bandwidth of the control system. (III) Superconducting Gravity Shielding The gravitational anomaly is generated by utilizing the special electromagnetic properties of superconductors. This scheme has the following limitations: (1) it depends on an extremely low temperature environment (liquid helium temperature), the system is complex and the cost is extremely high; (2) the shielding effect is limited and cannot be controlled; (3) it cannot achieve active shielding of static gravity. (iv) Gravitational manipulation based on massive objects The local gravitational field can be altered by moving or distributing a supermassive object. This approach has the following limitations: (1) it requires planetary-level mass, which cannot be achieved on a laboratory or engineering scale; (2) it is uncontrollable and unadjustable. The common limitation of existing technologies is that: It cannot shield static gravitational fields, but can only isolate dynamic vibrations; Dependent on extremely low temperature environments or extreme physical conditions; The shielding effect is not adjustable and cannot be actively controlled; The system is complex, costly, and difficult to engineer. There is a lack of an actively controllable mechanism for generating gravity shielding. To address the above problems, this invention provides a gravity shielding device and its control method based on topological Chern number regulation. Summary of the Invention

[0003] (a) Purpose of the invention This invention aims to solve the technical problems of existing gravity shielding technology, such as its inability to shield static gravity, reliance on extreme physical conditions, uncontrollable shielding effect, and difficulty in engineering. It provides a gravity shielding device and its control method based on topological Chern number control, which generates local gravitational field anomalies by controlling the projection angle of topologically nontrivial materials, thereby achieving active shielding of gravity in the target area. (II) Technical Solution This invention provides a gravity shielding device based on topological Chern number control, characterized in that it comprises: A topologically nontrivial material layer with a nonzero topological Chern number. ; A projection angle modulation system for modulating the projection angle of the material layer via an external field. ; A shielding cavity is disposed above the topologically nontrivial material layer to accommodate the shielded object; A gravity field monitoring system is used to monitor the changes in gravitational acceleration inside the shielded cavity in real time; A feedback control system is used to adjust the projection angle based on the monitoring results. This causes the gravitational acceleration inside the shielded cavity to approach zero. Core mathematical formula: In this invention, the projection angle Defined as: in and The radial and axial projection weights are respectively, satisfying the projection constraints: Local gravitational field anomaly Spatial gradient with respect to the time rate of change of the projection angle The following relationship must be satisfied: in This represents the rate of change of the projection angle over time. Shielding effect Defined as the ratio of gravitational acceleration after shielding to the original gravitational acceleration: in This is the original gravitational acceleration. When... hour, To achieve complete gravity shielding. The external field is an electric field, magnetic field, microwave field, or optical field, and the modulation frequency range is [range missing]. to . The topologically nontrivial material layer is at least one of a topological insulator (such as Bi2Se3, Sb2Te3), a magnetic topological insulator (such as Cr-doped (Bi,Sb)2Te3), or a twisted bilayer superlattice, and the film thickness is controlled in the range of 10–100 nm. (III) Beneficial Effects Static gravity shielding: can shield static gravity fields to achieve a zero-gravity or microgravity environment in the target area; Room temperature operation: It does not rely on a superconducting cryogenic environment and can operate normally at room temperature; Adjustable shielding effect: The shielding effect can be continuously adjusted by adjusting the projection angle, achieving precise control from partial shielding to complete shielding; Real-time feedback control: Precise shielding is achieved through gravity field monitoring and feedback control, with a fast response speed; Low energy consumption: Topological phase transition energy consumption is extremely low (less than...) (Changes in the number of units per unit) The system is relatively simple: it does not rely on giant masses or extreme physical conditions and can be realized on a laboratory scale; Compatible with existing technologies: The device can be implemented using existing thin film preparation and sensor technologies. Attached Figure Description

[0004] Figure 1 This is a schematic diagram of the overall structure of a gravity shielding device based on topological Chern number control, provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of the structure of a topologically nontrivial material layer provided in an embodiment of the present invention. Figure 3 The graph shows the shielding effect as a function of the projection angle θ, as provided in the embodiments of the present invention. Figure 4 The flowchart of gravity shielding closed-loop feedback control provided in the embodiment of the present invention. Detailed Implementation

[0005] Example 1: Gravity shielding device based on topological insulator thin film Step 1: Selecting a topologically nontrivial material. High-quality three-dimensional topological insulators, such as Bi₂Se₃ or Sb₂Te₃ single-crystal thin films, are selected as the core material layer. Molecular beam epitaxy is used to grow the film on sapphire or Si(111) substrates, with the film thickness controlled within the range of 10–100 nm. This material possesses a non-zero topological Chern number. . Step 2: Construct the projection angle modulation system. Integrate gate electrode arrays on both sides of the topological insulator thin film, and modulate the projection angle of the thin film by applying an adjustable vertical electric field. By adjusting the gate voltage, the projection angle is... Change over time . Step 3: Construct the shielding cavity. A shielding cavity is constructed above the topologically nontrivial material layer. The cavity is made of a non-magnetic material (such as aluminum alloy or stainless steel), and its internal space is used to accommodate the object to be shielded. The distance between the shielding cavity and the material layer can be adjusted as needed. Step 4: Generate a local gravitational field anomaly. Time rate of change of the projection angle. Local gravitational field anomalies are generated By adjusting the amplitude and frequency of the external field, it is possible to control... Size and orientation. Step 5: Gravity Field Monitoring and Feedback Control. The gravitational acceleration within the shielded cavity is measured in real time using a microelectromechanical system (MEMS) gravity sensor or atomic interferometer integrated within the cavity. The measurement data is fed back to the projection angle modulation system. When the measured value deviates from the target value (zero gravity), the external field parameters are automatically adjusted to bring the gravitational acceleration within the shielded cavity closer to zero. Step 6: Shielding Effectiveness Verification. The shielding effectiveness is calculated by comparing the gravitational acceleration measurements before and after shielding. .when At that time, it was confirmed that effective gravity shielding (shielding rate) was achieved. ). The beneficial effect of this embodiment is that it generates a local gravitational field anomaly by modulating the projection angle of the topological insulator film with an electric field, thereby achieving adjustable gravity shielding within the shielding cavity without the need for a low-temperature environment. Example 2: Enhanced Gravity Shielding Device Based on Multi-Layer Shadow Superposition Step 1: Fabrication of a multilayer topological heterojunction. Multiple layers of materials with different topological Chern numbers (such as Bi₂Se₃, Cr-doped Bi₂Se₃, twisted bilayer MoS₂, etc.) are sequentially stacked to form a multilayer heterojunction structure. Total topological Chern number. . Step 2: Multi-channel projection angle modulation. Each material layer is independently connected to electrodes, and the projection angle of each layer is controlled separately by a multi-channel signal generator. This allows the projection angles of each layer to change synchronously. Step 3: Shadow Interference Enhancement. When the shadows of each layer are superimposed, the total projection weight is... By adjusting the phase difference between each layer It can anomalously amplify a single-layer gravitational field under constructive interference conditions. times. Steps 4–6: Same as steps 3–6 in Example 1. The beneficial effect of this embodiment is that the superposition of multiple shadows can amplify the single-layer gravity shielding effect several times, which is suitable for application scenarios that require high shielding rate. Example 3: Fast-response gravity shielding device based on terahertz resonance excitation Step 1: Selecting the topology material. A magnetic topological insulator Cr-doped (Bi,Sb)2Te3 thin film was selected, which is highly sensitive to terahertz radiation. Step 2: Integrate the terahertz resonance excitation system. Arrange terahertz emission modules on both sides of the material, with the emission frequency matching the resonance frequency of the material's topological surface states. – ). Step 3: Ultrafast Projection Angle Modulation. Terahertz pulses resonate to excite electron-hole pairs in topological surface states, modulating the projection angle within a femtosecond to picosecond timescale. Ultrafast modulation generates The maximum value of significantly improves the speed of gravitational field anomaly response. Steps 4–6: Same as steps 4–6 in Example 1. The beneficial effect of this embodiment is that terahertz resonance excitation achieves femtosecond-level projection angle modulation, which shortens the response time of gravity shielding from milliseconds to microseconds. Example 4: Integrated Gravity Shielding Unit Step 1: System Integration. Integrate the topologically nontrivial material layer, projection angle modulation system, shielding cavity, gravity field monitoring system, and feedback control system into a standardized gravity shielding unit. Step 2: Multi-unit array arrangement. In scenarios requiring large-area gravity shielding, multiple shielding units are arranged, each unit is independently controlled, enabling large-scale gravity environment regulation. Step 3: Adaptive shielding control. The shielding units are connected to the central control system, and automatically adjust the shielding parameters of each unit according to the position and movement state of the shielded object. The beneficial effects of this embodiment are that the integrated gravity shielding unit can achieve standardized production and flexible deployment, and is suitable for scenarios such as precision experiments and gravity environment control inside spacecraft. Terminology Explanation

[0006] Terminology Meaning A topological Chern number (C) is a topological invariant that describes the topological nontriviality of a band and takes integer values. Projection angle (θ) is a geometric parameter describing the projection direction in fiber bundle projection mapping. Local gravitational field anomalies (Δg) are measurable gravitational changes caused by variations in the projection angle of topological materials. Shielding effect (S): The ratio of gravitational acceleration after shielding to the original gravitational acceleration. Topological insulators are insulating materials with nontrivial topological electronic band structures. Coherent superposition effect of projection weights in shadow interference multilayer topological materials.

Claims

1. A gravity shielding device based on topological Chern number control, characterized in that, include: A topologically nontrivial material layer with a nonzero topological Chern number. ; A projection angle modulation system for modulating the projection angle of the material layer via an external field. The projection angle Defined as ,in and satisfy ; A shielding cavity is disposed above the topologically nontrivial material layer to accommodate the shielded object; A gravity field monitoring system is used to monitor the changes in gravitational acceleration inside the shielded cavity in real time; A feedback control system is used to adjust the projection angle based on the monitoring results. This causes the gravitational acceleration inside the shielded cavity to approach zero.

2. The apparatus according to claim 1, characterized in that: The topologically nontrivial material is a topological insulator, a magnetic topological insulator, or a twisted bilayer superlattice.

3. The apparatus according to claim 1, characterized in that: The external field is an electric field, magnetic field, microwave field, or light field.

4. The apparatus according to claim 1, characterized in that: The topologically nontrivial material layer is a multilayer heterojunction structure, containing at least two material layers with different topological Chern numbers, and the total topological Chern number is... .

5. The apparatus according to claim 1, characterized in that: The gravity field monitoring system includes a microelectromechanical system gravity sensor or an atomic interferometer gravimeter.

6. The apparatus according to claim 1, characterized in that: The feedback control system is based on the shielding effect. Adjust the projection angle ,make .

7. A gravity shielding method based on topological Chern number control, characterized in that, Includes the following steps: (1) Provide a topologically nontrivial material layer with a nonzero topological Chern number. ; (2) A shielding cavity is provided above the topologically nontrivial material layer to accommodate the shielded object; (3) Modulate the projection angle of the material layer by an external field. This causes it to change over time; (4) Utilizing the time rate of change of the projection angle Local gravitational field anomalies are generated ; (5) The local gravitational field anomaly is used to counteract the gravitational acceleration inside the shielded cavity; (6) Monitor the gravitational acceleration inside the shielded cavity in real time and adjust the external field accordingly so that the gravitational acceleration inside the shielded cavity approaches zero.

8. The method according to claim 7, characterized in that: The projection angle described in step (3) changes periodically over time: .

9. The method according to claim 7, characterized in that: The local gravitational field anomaly described in step (4) is independent of the external environment and can operate independently at room temperature.

10. The method according to claim 7, characterized in that: The feedback adjustment in step (6) is based on the shielding effect. To carry out, to make .

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