Quantum Geometry Metrology in Solids
Published:Dec 31, 2025 01:24
•1 min read
•ArXiv
Analysis
This paper reviews recent advancements in experimentally accessing the Quantum Geometric Tensor (QGT) in real crystalline solids. It highlights the shift from focusing solely on Berry curvature to exploring the richer geometric content of Bloch bands, including the quantum metric. The paper discusses two approaches using ARPES: quasi-QGT and pseudospin tomography, detailing their physical meaning, implications, limitations, and future directions. This is significant because it opens new avenues for understanding and manipulating the properties of materials based on their quantum geometry.
Key Takeaways
- •The paper explores the quantum geometric tensor (QGT) beyond Berry curvature.
- •It reviews experimental methods using ARPES to access the QGT in solids.
- •Two approaches, quasi-QGT and pseudospin tomography, are discussed.
- •The paper highlights the implications, limitations, and future directions of these methods.
Reference
“The paper discusses two approaches for extracting the QGT: quasi-QGT and pseudospin tomography.”