内容：
Title: Recent Experimental and Theoretical Progresses in Nitrogen-vacancy (NV) Centers Ensembles Coupling with Superconducting Resonators
References:
http://www.nature.com/nature/journal/v478/n7368/full/nature10462.html
http://arxiv.org/abs/1110.2978
http://prl.aps.org/abstract/PRL/v105/i14/e140502
