Ion Trap Junction Transport Using a Traveling Potential Well
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Solution Overview
Problem
Conventional multi-dimensional ion traps and operating techniques are unable to reliably transport multi-ion crystals through the junctions of these traps, due to challenges in maintaining constant confinement and minimizing non-adiabatic excitation across different species of ions.
Innovation Solution
The method involves controlling voltage sources to generate a time-dependent potential that creates a potential well traveling through the junction, using a combination of paths of constant total confinement and radio frequency minimum, determined by a particular variable path ratio, to transport multi-atomic object crystals across the junction while minimizing excitation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional techniques are used to transport multi-ion crystals through junctions, then the ion trap structure is simple, but the transport reliability deteriorates due to inability to maintain constant confinement and minimize non-adiabatic excitation
Solution Approach 1:
The patent applies dynamics by making the transport potential time-dependent, allowing the potential well to travel through the junction and adapt to changing confinement conditions. The voltage signals are modulated dynamically to maintain constant total confinement as ions move from one leg to another, resolving the contradiction between reliable transport and control complexity.
Solution Approach 2:
The patent changes the parameters of the confining potential by adjusting voltage amplitudes and frequencies of different electrode pairs sequentially. By varying these parameters in a controlled manner during transport, the system maintains optimal confinement conditions throughout the junction traversal, improving transport reliability while managing control complexity through systematic parameter modulation.
2Manufacturing precision
If a time-dependent potential is used to transport multi-atomic object crystals through the junction, then the transport path precision is improved, but the control complexity increases due to multiple voltage sources and path combinations
Solution Approach 1:
The patent segments the transport path into distinct portions, each associated with specific electrode pairs (e.g., first pair for initial transport, second pair for junction traversal, third pair for final positioning). By controlling different voltage sources independently for each segment, the system achieves precise path control while managing complexity through modular electrode activation sequences.
Solution Approach 2:
The patent employs periodic voltage signals with specific frequencies to create oscillating potentials that guide ions through the junction. The radio frequency signals are modulated periodically to maintain confinement while enabling controlled transport, achieving path precision through rhythmic potential variations without requiring continuously complex control.
3Loss of substance
If conventional ion trap operation is used, then the device operation is simple, but atomic object loss increases due to non-adiabatic excitation during junction transport
Solution Approach 1:
The patent applies preliminary action by preparing the ion crystal for junction transport in advance through sympathetic cooling and initial positioning in the potential well. By pre-cooling the ions and establishing proper initial conditions before junction traversal, the system minimizes non-adiabatic excitations and atomic object loss during the actual transport operation, reducing loss without significantly complicating the overall operation.
Solution Approach 2:
The patent uses an intermediary potential well created by the time-dependent voltage signals to facilitate smooth ion transport through the junction. This intermediary potential acts as a mediator that gradually guides ions from one confinement region to another, avoiding abrupt changes that would cause non-adiabatic excitation and atomic object loss, thereby reducing loss while maintaining operational simplicity.
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 enables reliable and efficient transportation of multi-atomic object crystals through the junctions of multi-dimensional ion traps, reducing atomic object loss and maintaining the quantum state of the ions, thus enhancing the performance of quantum processors.
Implementation Method 1
controlling one or more voltage sources to cause generation of a time-dependent potential by applying controlling voltage signals to at least a portion of the plurality of electrodes
Implementation Method 2
The time-dependent potential is configured to generate a potential well that travels through the junction from the first leg to a second leg
Data Source
AI summary
A multi-atomic object crystal is transported from a first leg to a second leg of an atomic object confinement apparatus through a corresponding junction. Voltage sources in electrical communication with electrodes of the apparatus are controlled to confine the crystal in the first leg. The voltage sources are controlled to cause transport of the crystal along the first leg to proximate the junction and then to cause generation of a time-dependent potential at the junction that is configured to cause the crystal to traverse a transport path through the junction from the first leg to the second leg via a dynamic potential well defining a particular variable axial frequency. The transport path is determined by combining a path of constant total confinement for a representative atomic object of the crystal and a path of radio frequency minimum for the representative atomic object, using a particular variable path ratio.