← All entries Exhibit 2221 · Magazine Quanta Magazine: Physicists Mourn Joe Polchinski, Developer of Deep Ideas and Paradoxes Quanta Magazine developed by Joe and his collaborators, who fruitfully combined elements of the AdS/CFT correspondence with gravity in our four-dimensional world. 1 double space marked in red. Copy the quote and you'll get the real spaces too. Open the full-size photo in a new tab.