Phase Change Estimation with Quantum-Switched Optical Paths
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Solution Overview
Problem
Existing phase change amount estimation devices fail to increase Fisher information, leading to suboptimal estimation accuracy of phase changes in light due to noise conditions and interaction times with environmental systems.
Innovation Solution
A phase change amount estimation device utilizing a quantum switch to implement quantum mechanical superposition through two optical paths with environmental systems and an object to be measured, incorporating optical detectors to enhance phase change estimation accuracy by increasing Fisher information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional optical measurement methods are used, then the device structure is simple, but the Fisher information and estimation accuracy of phase change cannot be increased
Solution Approach 1:
The optical measurement system is segmented into multiple distinct optical paths (first optical path and second optical path), each containing different environmental systems and the object to be measured. This segmentation allows independent optimization of each path's Fisher information contribution while maintaining overall system manageability.
Solution Approach 2:
The invention transitions from conventional single-path optical measurement to multi-dimensional optical path configuration by introducing quantum mechanical superposition across multiple spatial paths. This dimensional expansion enables simultaneous acquisition of phase information from different environmental interactions, thereby increasing total Fisher information.
2Measurement precision
If quantum mechanical superposition with multiple optical paths is implemented, then the Fisher information and estimation accuracy are increased, but the device complexity increases
Solution Approach 1:
The quantum switch is designed as a universal control mechanism that can route optical signals through different environmental systems and optical paths based on quantum states. This multi-functional component manages the complexity by providing a centralized control architecture for the quantum superposition process.
Solution Approach 2:
The quantum switch acts as an intermediary between the light source and the multiple optical paths, mediating the quantum mechanical superposition process. This intermediary component simplifies the overall system architecture by centralizing the quantum control function in a single device rather than distributing complexity across multiple independent systems.
3Loss of information
If multiple environmental systems are introduced in different optical paths, then the Fisher information is enhanced, but the interaction time and noise conditions become more complex to control
Solution Approach 1:
Each optical path is configured with specific environmental systems tailored to provide particular types of phase information. The first optical path contains environmental systems with specific noise characteristics and interaction times, while the second optical path contains different environmental systems. This local optimization of quality allows each path to contribute uniquely to the total Fisher information.
Solution Approach 2:
The invention introduces asymmetric configurations of environmental systems in different optical paths, where the first environmental system and second environmental system have deliberately different properties. This asymmetry ensures that each path provides non-redundant information, maximizing the total Fisher information gained from the measurement.
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
Improves estimation accuracy of phase changes by enhancing Fisher information, enabling precise determination of phase changes and potential use as a sensing device for identifying properties of the measured object.
Implementation Method 1
by the quantum switch, a quantum mechanical superposition is achieved by forming either one of a first optical path in which the incoherent light, after being reflected by the optical demultiplexer, is made to pass through in an order of a first environmental system, an object to be measured, and a second environmental system, or a second optical path in which the incoherent light passed through the optical demultiplexer is made to pass through in an order of the second environmental system, the object to be measured, and the first environmental system
Implementation Method 2
the optical demultiplexer being configured to reflect the incoherent light or allow the incoherent light to pass through the optical demultiplexer
Implementation Method 3
a phase change amount estimator having a first optical detector to detect intensity of the incoherent light which has passed through the first optical path, a second optical detector to detect intensity of the incoherent light which has passed through the second optical path
Data Source
AI summary
A phase change amount estimation device includes: a light source emitting light; a quantum switch outputting the light from the light source to a first optical path in which the light is made to pass through in the order of a first environmental system, a measurement target object, and a second environmental system, or a second optical path in which the light is made to pass through in the order of the second environmental system, the measurement target object, and the first environmental system, in accordance with the quantum state of the light from the light source; and a phase change amount estimation unit estimating the amount of phase change in the light, the phase change being caused because of the light passing through the measurement target object, from the light which has passed through the first optical path or the light which has passed through the second optical path.