Particle Theory Seminar: Xi Dong, IAS, “Entanglement, Gravity, and Quantum Error Correction”

Event time: 
Tuesday, April 12, 2016 - 3:30pm to 4:30pm
Location: 
Sloane Physics Laboratory (SPL), 52 See map
217 Prospect St.
New Haven, CT 06511
(Location is wheelchair accessible)
Event description: 

Over the last few years it has become increasingly clear that there is a deep connection between quantum gravity and quantum information. The connection goes back to the discovery that black holes carry entropy with an amount given by the horizon area. I will present 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 this prescription, I will use it to calculate the mutual Renyi information between two disks of arbitrary dimension. Furthermore, I will provide quantum corrections to the area law and use it to solve the following important problem: 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.