3D SQUID Oscillator Layout for Reduced Circuit Footprint
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing occupied area of a circuit due to the longer wire length of magnetic field application circuits for superconducting quantum interference devices (SQUIDs) in existing designs, which is exacerbated by mounting configurations that place the magnetic field application circuit on the same plane as the resonator.
Innovation Solution
A three-dimensional arrangement of the magnetic field application circuit and resonator, where the magnetic field application circuit is positioned to face the loop circuits on a separate surface, reducing the need for the circuit to occupy the same plane as the resonator, thereby minimizing the overall circuit area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a plurality of SQUIDs is used to improve design freedom of resonator parameters, then the degree of freedom in designing parameters is improved, but the occupied area of the circuit increases due to longer wire length of magnetic field application circuit
Solution Approach 1:
The patent transitions from a two-dimensional planar arrangement to a three-dimensional stacked configuration. The resonator and magnetic field application circuit are placed on different planes (first surface and second surface), allowing the magnetic field application circuit to face multiple loop circuits vertically rather than horizontally. This dimensional change enables one electrode to simultaneously serve multiple SQUIDs without requiring proportionally longer wires, thus resolving the contradiction between design freedom and occupied area.
2Ease of manufacture
If the magnetic field application circuit is mounted on the same plane as the resonator, then the mounting structure is simplified, but the occupied area of the circuit increases
Solution Approach 1:
The patent implements a stacked configuration where the resonator is arranged on a first surface and the magnetic field application circuit is arranged on a second surface facing the first surface. This vertical stacking approach reduces the horizontal footprint of the circuit while maintaining manufacturability through standard multi-layer fabrication processes, effectively resolving the contradiction between ease of manufacture and occupied area.
Solution Approach 2:
The magnetic field application circuit is positioned to nest over the resonator structure in the vertical dimension. The electrode of the magnetic field application circuit faces the loop circuits from the opposite surface, creating a nested arrangement where components occupy overlapping projections but are separated in the vertical dimension, thereby reducing the overall occupied area.
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
This configuration effectively suppresses the occupied area of the circuit, maintaining the integrity of the resonator's parameters and coherence of quantum bits while allowing for efficient magnetic field application.
Implementation Method 1
a first superconducting line, a first Josephson junction, a second superconducting line, and a second Josephson junction are annularly connected
Implementation Method 2
a magnetic field application circuit including an electrode that goes around in a predetermined shape, the magnetic field application circuit being configured to apply a magnetic field to the loop circuit
Data Source
AI summary
Provided are an oscillator and a quantum computer capable of suppressing an occupied area of a circuit. An oscillator (300) includes a resonator (100) including a plurality of loop circuits in which a first superconducting line (112a), a first Josephson junction (111a), a second superconducting line (112b), and a second Josephson junction (111b) are annularly connected, and a magnetic field application circuit (200) including an electrode that goes around in a predetermined shape and configured to apply a magnetic field to the loop circuit, in which the electrode is arranged so as to face at least two of the loop circuits.