Quantum Computer Phase Tracking for Interaction-Time Correction
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Solution Overview
Problem
Quantum objects in quantum systems, such as qubits in quantum computers, experience phase deviations due to environmental effects and quantum operations, leading to jolting and impacting coherence and error rates.
Innovation Solution
A controller in the quantum system tracks phase updates in real-time or near real-time, adjusting manipulation signals to match the qubit's phase by considering location, transport, and quantum operation effects, ensuring phase correspondence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If quantum operations are performed on qubits, then quantum computation functionality is improved, but phase deviations occur due to environmental effects and energy addition
Solution Approach 1:
The system continuously monitors qubit phase through tracking circuits and uses this feedback to dynamically adjust manipulation signal phases via phase shifters, ensuring signals remain synchronized with qubit phases despite environmental disturbances and quantum operations
Solution Approach 2:
The system proactively tracks and compensates for phase deviations before they accumulate to harmful levels by continuously updating phase information and pre-adjusting signal phases to match anticipated qubit phase states
2Ease of operation
If manipulation signals are applied to qubits, then quantum operations are enabled, but phase mismatch causes jolting and increases error rates
Solution Approach 1:
Phase information from qubit tracking is fed back to manipulation signal generators, which adjust signal phases in real-time to match qubit phases, preventing phase mismatch and associated jolting during quantum operations
Solution Approach 2:
The system dynamically adjusts manipulation signal phases on-the-fly based on real-time qubit phase measurements, transitioning from static fixed-phase signals to adaptive dynamic phase signaling that follows qubit phase evolution
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 enhances qubit coherence and reduces error rates by aligning signal phases with qubit phases, improving the robustness and repeatability of quantum computations.
Implementation Method 1
A controller in the quantum system tracks phase updates in real-time or near real-time, adjusting manipulation signals to match the qubit's phase by considering location, transport, and quantum operation effects, ensuring phase correspondence
Data Source
AI summary
A controller of a quantum system identifies a phase update trigger for a quantum object of the quantum system and an interaction time. Responsive to identifying the phase update trigger, the controller determines, for between a first time and the interaction time, (a) a location/transport effect on a phase of the quantum object based on locations thereof and transport operations performed thereon, and (b) a quantum operation effect on the phase of the quantum object based on any quantum operations applied thereto. The immediately previous phase update for the quantum object occurred at the first time. Based on the location/transport effect, the quantum operation effect, and the interaction time, the controller determines an interaction time phase of the quantum object. The controller adjusts operation of a manipulation source such that a phase of a signal generated by the manipulation source corresponds to the interaction time phase at the interaction time.