Ion Trap Piezo Stabilization for Nanometer Beam Alignment

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Solution Overview

Problem

The position stability of ion traps in quantum information processing systems is compromised by mechanical drift and vibration, leading to reduced fidelity in qubit manipulation due to misalignment with Raman beams and imaging components.

Innovation Solution

Implementing a piezoelectric element coupled to the ion trap substrate to actively stabilize its position, allowing dynamic adjustment through controlled voltage application to align the ion trap with Raman beams and imaging components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If passive mechanical mounting is used for the ion trap, then the structure is simple and easy to manufacture, but the position stability deteriorates due to mechanical drift and vibration

Engineering Contradiction:

Improveposition stabilityVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces passive mechanical mounting with an active piezoelectric positioning system. The piezoelectric element converts electrical signals to precise mechanical displacements, enabling active compensation of position drift and vibration. This substitution transforms the system from passive mechanical stability to active electrical control, resolving the contradiction between simplicity and stability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent implements a feedback control loop where the position of the ion trap is continuously monitored and corrected. The controller receives position information, calculates the required compensation, and applies appropriate voltage to the piezoelectric element. This closed-loop feedback mechanism maintains high position stability despite mechanical disturbances, overcoming the limitation of simple passive mounting.

Inventive Principle:

Principle #23Feedback

2Measurement precision

If the ion trap position is manually adjusted, then the alignment can be corrected, but the adjustment process is time-consuming and reduces operational efficiency

Engineering Contradiction:

Improvealignment precisionVSAvoidoperational efficiency

Core Design Contradiction:

Measurement precisionVSProductivity

Solution Approach 1:

The patent enables the ion trap system to self-correct its position automatically. The controller continuously monitors alignment and applies real-time compensation through the piezoelectric element without requiring manual intervention. This self-service capability maintains high alignment precision while eliminating the time loss associated with manual adjustments, thereby improving operational efficiency.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent implements continuous position monitoring and correction rather than intermittent manual adjustment. The feedback control loop operates continuously, ensuring the ion trap remains precisely aligned throughout operation. This continuous active stabilization maintains measurement precision while maximizing productivity by eliminating downtime for manual realignment.

Inventive Principle:

Principle #20Continuity of useful action

3Manufacturing precision

If high-precision mechanical mounting is used to maintain alignment, then the positioning accuracy improves, but the manufacturing complexity and cost increase

Engineering Contradiction:

Improvepositioning accuracyVSAvoidfabrication difficulty

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The patent replaces the need for high-precision mechanical mounting with an active piezoelectric positioning system. Instead of relying on mechanically perfect mounting that is difficult and expensive to manufacture, the system uses a standard mounting combined with real-time piezoelectric compensation. This substitution achieves high positioning accuracy while significantly easing manufacturing requirements and reducing costs.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the approach from fixed mechanical precision to dynamic electrical control. By using the piezoelectric element's ability to change position in response to voltage changes, the system achieves high positioning accuracy through electrical parameter adjustment rather than mechanical precision, thereby simplifying fabrication.

Inventive Principle:

Principle #35Parameter changes

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

Enhances the precision and stability of qubit manipulation by compensating for mechanical disturbances, maintaining alignment at the nanometer scale and improving interaction fidelity.

Implementation Method 1

a piezoelectric element coupled to the ion trap substrate... determining an amount of voltage to apply to a piezoelectric element... to adjust a position of the ion trap substrate

Methodology Applied

Scientific EffectPiezoelectric effect: Piezoelectric Effect

Data Source

PatentUS12608637B2Active piezo stabilization of an ion trap

Publication Date: 2026.04.21 IONQ INC

AI summary

Aspects of the present disclosure relate generally to systems and methods for use in the implementation and/or operation of quantum information processing (QIP) systems, and more particularly, to provide stabilization of a position of an ion trap via displacement of one or more piezoelectric elements.