Barton Zwiebach is a string theorist, a professor at the MIT. He is one of the world's leading experts in string field theory. He wrote a textbook "A First Course in String Theory" which is considered to be sheer brilliance. String theory is a model of fundamental physics whose building blocks are one-dimensional extended objects (strings) rather than the zero-dimensional points (particles) that are the basis of the Standard Model of particle physics. ... The Massachusetts Institute of Technology, or MIT, is a research institution and university located in the city of Cambridge, Massachusetts along the Charles River and across from Bostons Back Bay district. ... String field theory is a proposal to define string theory in such a way that the background independence is respected. ...