Jop Briët, Oded Regev, Rishi Saket. Tight Hardness of the Non-commutative Grothendieck Problem. In Venkatesan Guruswami, editor, IEEE 56th Annual Symposium on Foundations of Computer Science, FOCS 2015, Berkeley, CA, USA, 17-20 October, 2015. pages 1108-1122, IEEE, 2015. [doi]
Abstract is missing.