Storage-Element Current Sensing for Cryogenic Periodic Signals
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Solution Overview
Problem
In cryogenic systems, signals experience deterioration as they travel through signal lines, making it difficult to determine the signal output at cryogenic temperatures, which affects the predictability of quantum computer operations.
Innovation Solution
A system comprising a sequence of storage elements, terminals for delivering and receiving charged particles, a signal source providing a periodic signal, and a current sensor to determine the current between storage elements, allowing for the extraction of information about the periodic signal by varying DC voltages and tracking Lissajous curves in voltage space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If voltage detection technology is used to measure signals at cryogenic temperatures, then signal information can be obtained, but the measurement precision is insufficient due to signal deterioration in cryogenic environments
Solution Approach 1:
The patent introduces an intermediary measurement system consisting of storage elements and current sensors that operate at room temperature rather than directly measuring the cryogenic signal. The periodic signal modulates charged particles in storage elements, and the resulting currents are measured by sensors at room temperature, providing an indirect but more reliable measurement method that avoids the limitations of direct voltage detection in cryogenic environments.
Solution Approach 2:
The patent replaces direct electrical voltage measurement with a current-based measurement system. Instead of using voltage probes that suffer from signal deterioration at cryogenic temperatures, the system uses storage elements to convert the voltage signal into current signals through charge storage and release mechanisms, which can then be measured with higher precision by current sensors operating at room temperature.
2Ease of operation
If direct voltage measurement is performed at cryogenic temperatures, then the signal can be monitored, but the device complexity increases due to the need for specialized cryogenic measurement equipment
Solution Approach 1:
The patent transitions the measurement system from the cryogenic dimension to the room temperature dimension. By having storage elements and current sensors operate at room temperature while only the signal line extends into the cryogenic environment, the system simplifies the measurement apparatus by eliminating the need for complex cryogenic-compatible measurement equipment, while still enabling signal monitoring.
3Measurement precision
If multiple storage elements are used to improve signal determination accuracy, then measurement precision increases, but the device complexity and cost increase
Solution Approach 1:
The patent divides the measurement function across multiple storage elements that each handle specific portions of the periodic signal cycle. By segmenting the signal measurement into discrete charge storage and release events across multiple elements, the system achieves higher measurement precision through statistical averaging and reduced noise, while keeping each individual storage element simple in structure.
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 accurate determination of periodic signals at cryogenic temperatures by measuring currents generated through the storage elements, improving the predictability of quantum computer operations and signal integrity.
Implementation Method 1
a sequence of storage elements each configured to store at least one charged particle... a current sensor configured to sense a current transmitted between or through the at least two storage elements
Data Source
AI summary
A system for determining information relating to a first periodic signal, the system comprising a sequence of storage elements each configured to store at least one charged particle, where a signal with a constant voltage and a signal with a varying voltage is fed to each storage element. One of the signals with the varying voltage is the first periodic signal. By monitoring the current pumped between the storage elements by the voltages applied to the storage elements, the information relating to the first periodic signal may be generated.