单光子发射材料的自主生成
Robert Tempke1, Terence Musho1
1Department of Mechanical, Materials and Aerospace Engineering, West Virginia University, P.O. Box 6106, Morgantown, WV, USA. tdmusho@mail.wvu.edu.
Nanoscale
|May 10, 2024
概括
材料科学中的机器学习需要更多的数据. 这项研究使用变量自编码器生成了超过一百万种用于量子感应的合成量子材料,识别了有希望的含分子.
科学领域:
- 材料科学 材料科学 材料科学
- 量子计算是一种量子计算.
- 机器学习 机器学习
背景情况:
- 机器学习模型训练在很大程度上依赖于数据的数量和质量.
- 材料科学中的原子数据集很少,这导致了训练偏见.
- 现有的材料发现实验数据往往偏向于有利的结果.
研究的目的:
- 开发基于SMILES的变量自编码器模型,用于生成合成量子材料数据集.
- 专注于为量子传感应用程序创建数据集,特别是具有双极阻断的两级量子分子.
- 解决材料发现数据集中的数据连续性问题和偏差.
主要方法:
- 使用一个在SMILES字符串上训练的变化自编码器 (VAE) 模型.
- 开发了一个改进的采样算法,结合新生成的数据.
- 将该技术应用于 8000 种材料的小初始数据集.
主要成果:
- 产生了超过100万个候选量子材料.
- 通过增强的抽样算法创建了一个更正常分布的合成数据集.
- 确定了几种含的分子作为有前途的单光子发射器.
结论:
- 基于VAE的方法有效地产生了量子材料的大规模合成数据集.
- 该方法克服了材料发现中的数据稀缺性和偏差问题.
- 生成的数据集突出显示了量子传感应用的潜在候选者.
相关概念视频
01:23Photoluminescence: Fluorescence and Phosphorescence
2.0K
Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
A pair of electrons in a...
2.0K
01:22Carrier Generation and Recombination
567
Carrier generation is the process by which electron-hole pairs (EHPs) are created within the semiconductor. In direct-bandgap semiconductors, such as gallium arsenide (GaAs), this occurs efficiently when energy absorption prompts valence electrons to leap into the conduction band, leaving behind holes.
This process is given by the generation rate G and is efficient due to the conservation of momentum between the valence band maximum and conduction band minimum.
Indirect generation involves an...
This process is given by the generation rate G and is efficient due to the conservation of momentum between the valence band maximum and conduction band minimum.
Indirect generation involves an...
567