Flux Qubit Lattice Coupling for Dense Quantum Interconnects
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Solution Overview
Problem
Current quantum computing architectures face limitations in qubit density, interconnectedness, and computational power due to high hardware requirements and asymmetrical crosstalk, which restrict the complexity and range of problems that can be solved.
Innovation Solution
The proposed quantum computing device employs a lattice structure with co-planar waveguide flux qubits, where each qubit is offset to form a lattice with inductive couplers, increasing qubit density and interconnectedness while reducing hardware requirements, allowing for more complex problem solving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional quantum computing architectures are used, then qubit connectivity can be achieved, but hardware requirements increase and qubit density decreases
Solution Approach 1:
The patent merges the qubit and coupler functions into a unified lattice structure where qubits are positioned at lattice points and automatically couple to neighbors through the lattice geometry itself, eliminating the need for separate coupler hardware components and achieving higher qubit density
Solution Approach 2:
The lattice structure serves multiple functions simultaneously: it provides qubit positioning, defines coupling topology, and enables scalable architecture, thereby reducing overall device complexity while maintaining high connectivity
2Adaptability or versatility
If qubit connectivity is increased, then computational power improves, but hardware requirements and device complexity increase
Solution Approach 1:
The patent segments the quantum computer into modular unit cells that can be tiled to scale computational power, where each unit cell contains a fixed pattern of qubits in a lattice structure, allowing systematic expansion without proportionally increasing coupling hardware
Solution Approach 2:
The patent transitions from one-dimensional or two-dimensional qubit arrangements to a three-dimensional lattice structure, enabling each qubit to couple with multiple neighbors in different spatial directions, thereby dramatically increasing connectivity and computational power without linearly increasing hardware complexity
3Ease of manufacture
If symmetric qubit arrangement is used, then manufacturing is simplified, but crosstalk between qubits increases
Solution Approach 1:
The patent introduces asymmetry in the lattice structure by offsetting qubits along one axis relative to others, creating an asymmetric coupling topology that reduces direct overlap between qubit wavefunctions and thereby minimizing crosstalk while maintaining manufacturability through regular lattice geometry
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 architecture achieves higher qubit density with less hardware, facilitating easier transitions between quantum states and accommodating higher crosstalk, thereby enabling a more computationally powerful quantum computer with increased problem-solving capabilities.
Implementation Method 1
each intersection between a qubit from the first array and a qubit from the second array in the lattice structure comprises a coupler arranged to inductively couple the qubit from the first array to the qubit from the second array
Implementation Method 2
Each qubit of the lattice structure includes a co-planar waveguide in electrical contact with a superconducting quantum interference device, SQUID
Implementation Method 3
Each qubit of the lattice structure includes a co-planar waveguide in electrical contact with a superconducting quantum interference device, SQUID
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
A quantum computing device includes: a first array of qubits arranged along a first axis; and a second array of qubits arranged along a second axis different from the first axis so that the qubits of the second array intersect with the qubits of the first array to form a lattice structure, in which each qubit in the first array is offset along the second axis relative to a directly adjacent qubit in the first array, each qubit in the second array is offset along the first axis relative to a directly adjacent qubit in the second array, and each intersection between a qubit from the first array and a qubit from the second array in the lattice structure comprises a coupler arranged to inductively couple the qubit from the first array to the qubit from the second array.