Integrated-Optic Beam Control for Neutral Atom Qubits
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Solution Overview
Problem
Existing methods for providing EM radiation in neutral atom quantum computing are limited by global control of amplitude and wavelength, which is slow and inadequate for fast computations, and optical trapping apparatus lacks precise trap-position control.
Innovation Solution
A system using integrated-optic EM radiation sources and modulators generates spatially separate EM radiation beams for individual atoms, allowing independent control of amplitude and wavelength through integrated-optic EM intensity and frequency modulators, and output couplers to direct beams out of plane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single EM radiation source is used for global control of all qubit atoms, then device complexity is reduced, but computation speed and control precision deteriorate due to slow wavelength changes affecting all atoms uniformly
Solution Approach 1:
The patent divides the single EM radiation source into multiple spatially separate EM radiation sources, with each source dedicated to controlling specific qubit atoms. This segmentation allows independent wavelength and amplitude control for each atom, enabling fast computation operations without requiring global wavelength changes that would affect all atoms simultaneously.
Solution Approach 2:
The patent implements local quality by providing each qubit atom with its own dedicated EM radiation source that can be independently tuned. This allows different wavelengths, amplitudes, and detunings to be applied to different atoms based on their specific computational requirements, rather than using a single global source that must accommodate all atoms uniformly.
2Ease of operation
If a single EM radiation source is used for global control, then ease of operation is improved, but measurement precision and control accuracy deteriorate due to inability to independently adjust detuning for individual atoms
Solution Approach 1:
The patent segments the control system into multiple independent EM radiation sources, each responsible for specific qubit atoms. This segmentation enables precise independent control of detuning for each atom, allowing accurate measurement and manipulation of individual quantum states without interference from global control limitations.
Solution Approach 2:
The patent applies local quality by enabling each EM radiation source to be independently tuned to provide optimal detuning for its designated qubit atoms. This local control capability allows precise adjustment of energy level transitions for individual atoms, improving measurement precision and control accuracy while maintaining ease of operation through modular design.
3Device complexity
If optical trapping apparatus uses global amplitude control, then device complexity is reduced, but trap-position control precision deteriorates due to inability to independently control trap positions
Solution Approach 1:
The patent segments the optical trapping apparatus into multiple independent EM radiation sources, each capable of independent amplitude and wavelength control. This segmentation enables precise control of trap positions for individual qubit atoms, allowing accurate manipulation of atomic positions while maintaining relatively simple device architecture through the use of separate dedicated sources rather than a complex globally-controlled system.
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
Enables fast and precise control of EM radiation for neutral atom quantum computations, improving computation speed and trap-position control, suitable for analogue quantum computations.
Implementation Method 1
one or more integrated-optic EM radiation source assemblies for generating at least first and second EM radiation and outputting said EM radiation along respective spatially separate output paths
Implementation Method 2
The system may comprise a plurality of integrated-optic EM intensity and/or frequency modulator apparatus. At least a first of the integrated-optic EM modulator apparatus is for receiving the first EM radiation. At least a second of the integrated-optic EM modulator apparatus is for receiving the second EM radiation.
Data Source
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AI summary
There is presented a system for outputting a plurality of electromagnetic, EM, radiation beams. The system is configured such that at least one of the EM radiation beams interacts with an atom of plurality of atoms of a neutral atom, quantum computer that is not interacted with by a second of the EM radiation beams; or, at least two of the EM radiation beams are for interacting with a respective different atom of a plurality of atoms neutral atom quantum computer. The plurality of atoms is for defining a respective plurality of qubits in a quantum computation performed by the neutral atom quantum computer. The system comprises one or more integrated-optic EM radiation source assemblies for generating at least first and second EM radiation and outputting said EM radiation along respective spatially separate output paths. The system comprises a plurality of integrated-optic EM modulator apparatus. At least a first of the integrated-optic EM modulator apparatus is for receiving the first EM radiation. At least a second of the integrated-optic EM modulator apparatus is for receiving the second EM radiation. The system comprises a plurality of output couplers. Each output coupler is for receiving, along a plane, EM radiation output from at least one of the integrated-optic modulator apparatus. Each output coupler is further for outputting the received EM radiation as an EM radiation beam in a direction either along the same plane or out of the plane.