期刊
NATIONAL SCIENCE REVIEW
卷 7, 期 2, 页码 254-260出版社
OXFORD UNIV PRESS
DOI: 10.1093/nsr/nwz193
关键词
quantum geometry; topological physics; quantum measurement; quantum control; quantum information
资金
- National Natural Science Foundation of China [11574103, 11690030, 11690032, 11874024]
- EU
- BMBF
- ERC Synergy grant BioQ
- DFG [FOR 1493, SPP 1923]
- VW Stiftung
- ERC
- EU (AsteriQs)
- BW Stiftung
- Ministry of Science and Arts, Center for Integrated Quantum Science and Technology (IQST)
- JSPS KAKENHI [JP18H05857]
- RIKEN Incentive Research Project
- Interdisciplinary Theoretical and Mathematical Sciences Program (iTHEMS) at RIKEN
- ERC Starting Grant TopoCold
- Fonds De La Recherche Scientifique (FRS-FNRS) (Belgium)
Geometry and topology are fundamental concepts, which underlie a wide range of fascinating physical phenomena such as topological states of matter and topological defects. In quantum mechanics, the geometry of quantum states is fully captured by the quantum geometric tensor. Using a qubit formed by an NV center in diamond, we perform the first experimental measurement of the complete quantum geometric tensor. Our approach builds on a strong connection between coherent Rabi oscillations upon parametric modulations and the quantum geometry of the underlying states. We then apply our method to a system of two interacting qubits, by exploiting the coupling between the NV center spin and a neighboring C-13 nuclear spin. Our results establish coherent dynamical responses as a versatile probe for quantum geometry, and they pave the way for the detection of novel topological phenomena in solid state.
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