講座內容：Quantum coherence is the fundamental reason for the significant phenomena differing from our everyday life such as uncertainty principle, entanglement and contextuality in quantum mechanics. Recently,the problem of quantifying coherence has been attracting a great deal ofinterests. We will report some main progresses in research of this field. As anexample, we observe that quantum coherence as resource should satisfy relationsdue to uncertainty principle in entropic representation. Experimentally, we demonstratethe coherence resource and entropic uncertainty relations in three measurementsbases by a natural three dimensional solid-state systems:the nitrogen-vacancy (NV) center in pure diamond. The experimentaldata agrees well with theoretical expectation. In a different experiment, weshow that valley qubit can demonstrate the quantum coherence.