Nanofiber Cavity Fabrication via Rotating UV Exposure
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Solution Overview
Problem
Existing quantum computing technologies face challenges in scalability, reliability, and qubit coherence due to environmental noise and the complexity of cooling systems, fabrication processes, and precise control requirements.
Innovation Solution
A nanofiber-based quantum computing system with an optical cavity configured using a pair of Bragg Gratings, where the fiber Bragg gratings are fabricated using a phase shift mask and UV exposure, with the fiber rotated during exposure to create azimuthally symmetric patterns, achieving polarization-degenerate cavities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional quantum computing approaches (superconducting qubits, trapped ion qubits, topological qubits, photonic qubits) are used, then quantum computing functionality can be achieved, but scalability and reliability are limited due to environmental noise sensitivity and complex system requirements
Solution Approach 1:
The patent replaces complex mechanical cooling systems with an optical cavity-based quantum computing approach using nanofibers and Bragg gratings. The optical cavity provides a different mechanism for qubit operation that does not require extreme cooling, thereby reducing device complexity while maintaining or improving reliability.
Solution Approach 2:
The patent changes the operating parameters by using nanofiber optics with specific Bragg grating structures that enable quantum operations at room temperature or reduced temperature requirements. This parameter change eliminates the need for complex cryogenic cooling systems while maintaining qubit coherence.
2Adaptability or versatility
If conventional quantum computing approaches are used, then quantum computing functionality can be achieved, but scalability is limited due to difficulty in individually manipulating qubits and precise control requirements
Solution Approach 1:
The optical cavity with Bragg gratings provides a universal platform that can manipulate multiple qubits simultaneously through optical fields, eliminating the need for individual precise control of each qubit. The cavity mode structure enables multi-qubit operations through a single control mechanism, thereby improving scalability.
Solution Approach 2:
The patent replaces complex mechanical and optical control systems with a simplified optical cavity approach where quantum information is manipulated through optical modes. This substitution reduces the complexity of individual qubit control while maintaining the ability to perform quantum operations.
3Ease of manufacture
If fiber Bragg gratings are formed without rotation during UV exposure, then fabrication process is simpler, but polarization degeneracy is not achieved
Solution Approach 1:
The patent introduces dynamic rotation of the fiber during UV exposure to create azimuthally symmetric refractive index modulations. This dynamic approach transforms a static fabrication process into a dynamic one, enabling polarization degeneracy while maintaining fabrication simplicity through the use of standard UV exposure equipment.
Solution Approach 2:
The rotation during UV exposure creates periodic azimuthal symmetry in the refractive index modulation. This periodic action ensures that the Bragg grating structure is invariant under rotation, achieving polarization degeneracy without complicating the overall fabrication process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a compact, efficient, and reliable quantum computing system capable of supporting arbitrary polarization states without different resonant frequencies, enhancing scalability and coherence of qubits.
Implementation Method 1
transmitting electromagnetic radiation characterized by a wavelength of 150 nm to 400 nm and longer through a pattern of a phase shift mask to diffract the electromagnetic radiation to form an interference pattern
Implementation Method 2
causing a formation of a first fiber Bragg grating onto the core of fiber optical cable region by changing a refractive index of the core of fiber optical cable region using the electromagnetic radiation
Data Source
AI summary
In an example, the present invention provides a method of manufacturing a polarization-degenerate fiber Bragg grating nanofiber cavity for quantum computing or quantum repeater. The method includes transmitting electromagnetic radiation characterized by a wavelength of 150 nm to 400 nm and longer through a pattern of a phase shift mask to diffract the electromagnetic radiation to form an interference pattern. The pattern is to be illuminated onto a core of a first end of a fiber optical cable region. In an example, the method forms a fiber Bragg grating onto the core of fiber optical cable region by changing a refractive index of the core of fiber optical cable region using the electromagnetic radiation while rotating the fiber optical cable about an axis defined along a length of the fiber optical cable region.