"Entanglement, Gravity, and Quantum Information," by Xi Dong (Institute for Advanced Study)

Monday, March 7, 2016 - 2:30pm to 3:30pm
TEP Seminars

TEP Seminar

Physics & Astronomy Building (PAB) 4-330
Monday, March 7, 2016

Guest Speaker: Xi Dong (Institute for Advanced Study)

Talk Title: "Entanglement, Gravity, and Quantum Information"


Over the last few years it has become increasingly clear that there is a deep connection between fundamental physics and quantum information. The connection goes back to the remarkable discovery that black holes carry entropy with an amount given by the horizon area. I will present new evidence that this is only the tip of the iceberg, and prove that a similar area law applies to more general Renyi entanglement entropies. To demonstrate the simplicity of my prescription, I will use it to provide the first holographic calculation of the mutual Renyi information between two disks of arbitrary dimension. I will comment on the prospect of verifying this area law experimentally in light of recent advances in measuring Renyi entropies. Furthermore, I will provide quantum corrections to the area law and use it to solve a long-standing problem in quantum gravity: what region of the dual spacetime is described by a subregion in a holographic theory? The answer to this question lies in a new perspective that I will advocate: holography is a quantum error correcting code.

Event Attachments: 
PAB 4-330