Charged Particle Trap Qubit Control Without Ion Shuttling

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Solution Overview

Problem

Existing quantum computing architectures face challenges in efficiently controlling individual qubits due to the need for spatially-varying control fields, which are difficult to generate and integrate, leading to bottlenecks in single-qubit operations and limitations in parallel processing.

Innovation Solution

A method using a global potential gradient combined with local oscillating electric fields, applied through trap electrodes, allows for independent control of multiple qubits without requiring individually adjustable laser or magnetic field sources, enabling parallelizable and efficient single-qubit operations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If ion shuttling is used to address single-qubit operations, then individual qubit control is achieved, but operation speed is reduced due to filtering control electrodes

Engineering Contradiction:

Improveindividual qubit controlVSAvoidoperation speed

Core Design Contradiction:

Ease of operationVSSpeed

Solution Approach 1:

The patent combines global potential gradient control with local oscillating electric fields to simultaneously achieve individual qubit addressing and fast operation. Multiple qubits are controlled in parallel by applying different local oscillating fields while maintaining a shared global gradient, eliminating the sequential shuttling bottleneck.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The global potential gradient serves multiple qubits simultaneously, providing a universal control mechanism that can address any qubit in the chain. Local oscillating fields are then applied to specific qubits as needed, making the system versatile for different quantum gate operations without requiring physical reconfiguration.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Productivity

If O(N) individually adjustable laser or magnetic field sources are used to operate on N qubits in parallel, then parallel processing capability is improved, but device complexity and resource requirements increase

Engineering Contradiction:

Improveparallel processing capabilityVSAvoidnumber of field sources

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The control system is segmented into a global component (potential gradient applied to all qubits) and local components (oscillating fields applied to individual qubits). This segmentation allows parallel operation of multiple qubits while minimizing the number of independent control sources needed, as the global gradient provides universal control and local fields provide selective addressing.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The global potential gradient acts as an intermediary that enables efficient coupling between the control system and multiple qubits. By establishing a shared gradient field, the system can address multiple qubits in parallel using fewer control sources than would otherwise be required, reducing overall system complexity.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 approach simplifies the control of multiple qubits by using a monochromatic potential gradient and localized electric fields, reducing the need for localized fields and ion shuttling, thereby enhancing operation speed and reducing resource intensity.

Implementation Method 1

applying a first oscillating potential to a first electrode at a first frequency so as to apply a first oscillating electric field to the first charged particle

Methodology Applied

Scientific EffectElectric dipole interaction: Electric Field

Implementation Method 2

Applying the potential gradient may comprise applying at least one magnetic field gradient and/or laser field(s) to the first and second charged particles

Methodology Applied

Scientific EffectMagnetic dipole interaction: Magnetic Field

Implementation Method 3

Applying the potential gradient may comprise applying at least one magnetic field gradient and/or laser field(s) to the first and second charged particles

Methodology Applied

Scientific EffectLight-matter interaction: Laser

Data Source

PatentUS20260004171A1Charged particle trap operation

Publication Date: 2026.01.01 OXFORD IONICS LTD

AI summary

A method of operating a charged particle trap which includes a set of trap electrodes. The method comprise trapping a first charged particle at a first position, the first charged particle providing a first qubit having a first transition frequency and trapping a second charged particle, at a second position, the second charged particle providing a second qubit having a second transition frequency. The method comprises applying a potential gradient to the first and second charged particles, wherein the first and second charged particles experience first and second magnitudes of potential gradient, respectively, and wherein the potential gradient oscillates at a given frequency and is monochromatic. The method comprises, while applying the potential gradient, applying a first oscillating potential to a first electrode at a first given frequency so as to apply a first oscillating electric field to the first charged particle and applying a second oscillating potential to a second electrode at a second frequency so as to apply a second oscillating electric field to the second charged particle.