Jared Kaplan, one of the researchers mentioned in the article, has a good set of notes here: http://sites.krieger.jhu.edu/jared-kaplan/files/2016/05/AdSCFTCours

Jared Kaplan, one of the researchers mentioned in the article, has a good set of notes here: http://sites.krieger.jhu.edu/jared-kaplan/files/2016/05/AdSCFTCourseNotesCurrentPublic.pdf http://sites.krieger.jhu.edu/jared-kaplan/files/2016/05/AdSC... David Tong does a good job explaining background physics and his notes can be found here: http://www.damtp.cam.ac.uk/user/tong/teaching.html http://www.damtp.cam.ac.uk/user/tong/teaching.html The fourth chapter of his string theory notes are about as approachable an introduction to conformal field theory that there is. His QFT notes are good too.