Group Seminar via Zoom: Universal protocol for quantum teleportation via scrambling

Prof. Norman Yao, University of California, Berkeley, USA
Group meeting via video conference (Zoom)
Tuesday, June 23rd, 09:00 (MEZ)

Dealing with the unique situation of partial lock downs worldwide and home office solutions at our Institute due to the current spreading of the Covid 19 virus, we are now holding our group seminars and journal clubs via video conference. This procedure enables us to continue our research, enhance discussions and exchange important information.

Abstract:

Much of the power and potential of quantum mechanics remains concealed if we focus solely on systems in thermal equilibrium. Indeed, many applications, such as quantum metrology, computing, and communication rely upon the production, preservation, and manipulation of systems that are far-from-equilibrium. However, predicting and understanding the dynamics of quantum information in such systems remains an essential open question. In this talk, I will focus on two opposing limits of this question. First, I will discuss the notion of quantum information scrambling, wherein many-body dynamics -- though ultimately unitary -- scatters initially-localized quantum information across all available degrees of freedom. In particular, I will describe a universal teleportation-based approach, which enables one to distinguish between various different classes of quantum information scrambling as well as decoherence. Second, using periodic driving as a tool, I will explore whether non-equilibrium quantum systems can exhibit novel prethermal phases of matter distinct from their equilibrium counterparts.

If you would like to join our group seminars via Zoom, please contact us for more information.