Quantum Emitter Reflector Geometry for Spontaneous Emission Suppression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The spontaneous emission of quantum entities limits the lifetime of excited states, which in turn affects the fidelity and storage time of quantum information, particularly in quantum computing applications, due to random phase and direction of emitted photons.
Innovation Solution
An apparatus and method that utilize a reflector to achieve destructive interference of emitted and reflected radiation, suppressing spontaneous emissions and guiding them in specific directions by adjusting the position and focal length of the reflector and quantum emitters, employing mirrors and spatial light modulators to control the emission patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If spontaneous emission is allowed to occur naturally, then quantum information can be processed, but the lifetime of excited states is limited and error rates increase
Solution Approach 1:
The patent converts the harmful effect of spontaneous emission (which causes decoherence and limits excited state lifetime) into a beneficial effect by using the emitted photons to create destructive interference patterns. The reflector redirects spontaneous emissions to interfere destructively with the original emission, effectively suppressing the harmful decay while maintaining quantum information processing capability.
Solution Approach 2:
The reflector acts as an intermediary element that mediates between the quantum emitter and the emitted photons. By positioning the reflector at specific distances and angles, it controls the path of spontaneous emissions to create the desired destructive interference, thereby extending excited state lifetime without directly modifying the quantum emitter itself.
2Duration of action of moving object
If a reflector is used to guide emissions, then lifetime of excited states is enhanced, but device complexity increases
Solution Approach 1:
The patent optimizes specific parameters of the reflector system (distance from emitter, angle of reflection, focal length) to achieve effective emission guidance. By carefully selecting these parameters, the system achieves the desired destructive interference with a relatively simple reflector configuration, minimizing the increase in device complexity while maximizing the extension of excited state lifetime.
3Duration of action of moving object
If destructive interference is obtained for all directions, then spontaneous emission is suppressed, but quantum information cannot be read out
Solution Approach 1:
The patent applies directional selectivity by creating destructive interference only in specific directions while leaving other directions unaffected. The reflector is positioned and configured to suppress emissions in particular directions (where detectors are not located) while allowing emissions in other directions to proceed normally, thus maintaining the ability to read out quantum information through detectors positioned in non-suppressed directions.
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 the lifetime of excited states, reduces error rates in quantum operations, and increases the fidelity of quantum information storage and processing by constraining emissions to desired directions, thereby improving the performance of quantum computing and related technologies.
Implementation Method 1
a reflector adapted to reflect an emission of the quantum emitter in a second spatial direction according to a boundary condition
Implementation Method 2
the boundary condition comprises obtaining destructive interference of the reflected emission with the emission of the quantum emitter
Implementation Method 3
the reflector comprising a portion adapted to guide an emission of the quantum emitter in a first spatial direction
Data Source
AI summary
Some embodiments in the present disclosure relate to an apparatus and methods for guiding spontaneous emissions of a quantum emitter in a first spatial direction. A reflector reflects an emission of the quantum emitter in a second spatial direction according to a boundary condition, wherein the boundary condition includes obtaining destructive interference of the reflected emission with the emission of the quantum emitter, and the reflector includes a portion adapted to guide an emission of the quantum emitter in the first spatial direction.