Quantum Emitter Reflector Layout for Spontaneous Emission Suppression
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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 comprising two or more quantum emitters in a plane and a reflector along a perpendicular axis, which applies a boundary condition to achieve destructive interference between emitted and reflected emissions, suppressing spontaneous emissions and guiding them to specific directions using a spatial light modulator or mirror.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If spontaneous emissions are allowed to occur naturally, then the quantum emitters can return to ground state and maintain quantum operations, but the lifetime of excited states is limited and error rates increase due to random phase and direction of emitted photons
Solution Approach 1:
The patent converts the harmful spontaneous emission process into a beneficial controlled emission process by introducing a reflector that creates destructive interference for unwanted emission directions while allowing controlled emission in desired directions. The reflected photons that would normally cause decoherence are now harnessed to extend excited state lifetime through interference effects.
Solution Approach 2:
The patent changes the boundary conditions of the electromagnetic field by introducing a reflector at a specific distance from the quantum emitters. This modifies the density of optical states and alters the emission characteristics, transforming spontaneous emission from an uncontrollable process into a controllable one that extends excited state lifetime.
2Duration of action of moving object
If a reflector is introduced to control spontaneous emissions through destructive interference, then the lifetime of excited states is enhanced and emission directions are controlled, but the device complexity increases
Solution Approach 1:
The patent segments the control of spontaneous emissions by using multiple reflectors positioned at specific distances from the quantum emitters. Each reflector independently controls emissions in different directions, allowing precise spatial control of the electromagnetic field and enabling enhanced lifetime without requiring a single complex all-encompassing structure.
3Reliability
If the reflector distance is optimized for maximum destructive interference, then spontaneous emissions are suppressed most effectively, but the adaptability to different emission wavelengths and configurations is reduced
Solution Approach 1:
The patent employs dynamically adjustable reflectors that can change their position and/or reflective properties in response to different wavelengths and quantum emitter configurations. This dynamic adjustment capability allows the system to maintain optimal destructive interference conditions across various operational parameters, thereby preserving both suppression effectiveness and adaptability.
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 improves the fidelity of quantum information storage by controlling and constraining spontaneous emissions, thereby improving the performance of quantum computing and related technologies.
Implementation Method 1
a reflector located along an axis perpendicular to the plane. The reflector is adapted to reflect an emission of a quantum emitter out of the two or more quantum emitters
Implementation Method 2
the boundary condition comprises obtaining destructive interference of the reflected emissions with the emissions of the two or more quantum emitters
Data Source
AI summary
Some embodiments in the present disclosure relate to an apparatus and methods for suppressing spontaneous emissions of two or more quantum emitters. The two or more quantum emitters are located in a plane. A reflector is located along an axis perpendicular to the plane. The reflector reflects an emission of a quantum emitter out of the two or more quantum emitters according to a boundary condition, wherein the boundary condition includes obtaining destructive interference of the reflected emissions with the emissions of the two or more quantum emitters.