# Quantum Machine Learning in Feature Hilbert Spaces

> Research article (Physical Review Letters, 2019) · cited 1,604× · AI/ML

**Wikidata**: [openalex:W2792946961](https://www.wikidata.org/wiki/openalex:W2792946961)  
**Source**: https://4ort.xyz/entity/quantum-machine-learning-in-feature-hilbert-spaces