I did a search but couldn't find what I was looking for. I'm a physics student studying QM at the graduate level. I'm aware that "nobody truly understands QM" but I'd like to get as much insight and intuition as possible. Textbooks are good for learning to solve problems and learning the formalisms, but I tried reading a QM paper and felt like I didn't understand any of it. This was the paper, in case you're curious: http://www.nature.com/nature/journal/v517/n7536/full/nature14091.html I'd really like to read some papers on experiments that illustrate QM principles and tools, doesn't really matter how old they are since I'm not looking for the most cutting-edge research or findings (although non-archaic notation/terminology would be nice). I'm mainly interested in the papers' pedagogical usefulness for illustrating things like harmonic oscillators, angular momentum (rotation operators, angular momentum addition, spherical harmonics, etc.), symmetries, and what these things are all for. Thanks!