A minimal introduction to AdS/CFT as a Quantum error correcting code
- 講者陳麒方 先生 (美國加州理工學院)
邀請人：鐘楷閔 - 時間2020-09-17 (Thu.) 10:30 ~ 12:30
- 地點資訊所新館107演講廳
線上串流
【線上會議】
會議號：170 678 3077
密碼：8Vh5pjdBgJ3
*此系列演講主要開放對象為本院資訊所及資創同仁
**本所具與會者參加資格之認定，為確保演講品質，必要時得將解除與會權限(現場及視訊)
摘要
AdS/CFT is a well-supported conjecture that quantum gravity in 2+1 D is ‘dual’ to a 1+1 D CFT, which for our purpose is a strongly interacting condensed matter system. Despite its string theory origin, some of the key recent development can be understood without any strings, QFT, but only classical General Relativity, and most importantly quantum information ideas such as finite qudits and unitary group. In particular, we will introduce the quantum error correcting code aspects of AdS/CFT. Keeping only the minimal claims from physics, we will see how they are captured by a toy model, the ‘HAPPY code’, defined in the tensor network language which I will introduce. It explicitly showed how information in the 2D surface is isometrically embeds onto the 1D boundary, and moreover each subregion of the boundary still preserves some information about the bulk. For the CS minded audience, this is a quantum error correcting code with some sense of locality and geometry. I will base on https://arxiv.org/pdf/1607.03901 for the notation of QECC, https://arxiv.org/pdf/1503.06237 for the HAPPY code, https://www.tensors.net/ for intro to tensor networks.