Qubit Reset Using Pi Pulses and Microwave Chirp Signals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional qubit reset procedures are inefficient and unable to effectively reset qubits from excited states higher than the first excited energy level, leading to errors in quantum computations due to unintentional or intentional transitions to higher excited states.
Innovation Solution
A system and method that uses a processor and memory to apply signals, such as pi pulses and microwave chirp signals, to transition qubit populations from higher excited states to the ground state or first excited state, enabling unconditional and rapid resetting of qubits without requiring tunable low-frequency resonators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional passive reset procedures are used, then qubits can return to ground state through energy relaxation, but the reset time is too long and throughput is limited
Solution Approach 1:
The patent applies preliminary action by actively de-exciting qubits to the first excited state before they naturally relax to the ground state. By using pi pulses and microwave chirp signals to preemptively transition qubits from higher excited states to the first excited state, the system reduces the overall reset time and increases throughput while maintaining high fidelity.
2Adaptability or versatility
If traditional reset procedures are used, then qubits in the first excited state can be reset, but qubits in higher excited states cannot be effectively reset
Solution Approach 1:
The patent applies segmentation by dividing the reset process into two distinct stages: first, transitioning qubits from higher excited states to the first excited state using pi pulses or microwave chirp signals, and second, allowing natural relaxation or applying additional signals to reach the ground state. This segmented approach enables effective resetting of qubits regardless of their initial excited state.
Solution Approach 2:
The first excited state serves as an intermediary state in the reset process. Qubits in higher excited states are first transitioned to this intermediate state, which then serves as a stepping stone to the final ground state. This intermediary approach allows the system to handle qubits in any excited state uniformly.
3Reliability
If qubits unintentionally transition to higher excited states during operation, then computation errors occur, but traditional procedures cannot efficiently reset these states
Solution Approach 1:
The patent applies continuity of useful action by implementing an active reset mechanism that continuously monitors and corrects qubit states. Rather than waiting for passive relaxation, the system actively applies pi pulses or microwave chirp signals to maintain qubits in the desired state, ensuring continuous computation accuracy with minimal interruption.
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 allows for efficient and effective resetting of qubits from highly excited states, minimizing errors and increasing quantum computer throughput by actively de-exciting qubits to the ground state with minimal time between circuit executions.
Implementation Method 1
applying a signal to the qubit system that transitions a population of a second excited state to the first excited state
Implementation Method 2
a qubit reset can be passively achieved by waiting a sufficient amount of time after the last circuit of the quantum computer has run in order for the energy relaxation to return the qubit from its excited state to the target state
Data Source
AI summary
Techniques regarding resetting highly excited qubits are provided. For example, one or more embodiments described herein can comprise a system, which can comprise a memory that can store computer executable components. The system can also comprise a processor, operably coupled to the memory, and that can execute the computer executable components stored in the memory. The computer executable components can comprise a reset component that can de-excite a qubit system to a target state by transitioning a population of a first excited state of the qubit system to a ground state and by applying a signal to the qubit system that transitions a population of a second excited state to the first excited state.