PKU HEP Seminar and Workshop (北京大学高能物理组)
Quantum information scrambling, quantum randomness complexity, and their diagnostics
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Asia/Shanghai
B105 (CHEP)
B105
CHEP
West Building, School of Physics, PKU
Description
“Scrambling” describes the physical phenomenon that initially localized quantum information gets spread onto the entire system and becomes “invisible” to non-global measurements. It is closely relevant to many important problems in various areas of physics, including black hole information problem, many-body localization and quantum chaos, quantum randomness, and even the forefront of quantum technologies such as quantum computational supremacy. I will briefly introduce the origins of scrambling and the above connections. I will then discuss how to measure the scrambling phenomena by entanglement properties (Renyi entropies) and operator growth (out-of-time-ordered correlators). In particular, I will introduce in more detail our recent work, which proves that the time scales of operator and entanglement growth could be very different in non-Euclidean geometries, which has interesting implications to black holes.
Zi-Wen Liu （刘子文）
Bio: Currently Postdoctoral Fellow at Perimeter Institute for Theoretical Physics.
2018 Ph.D. Physics, MIT
2015 S.M. Mechanical Engineering, MIT;
2013 B.S. Materials Science, Nanjing University;
Research interests: Quantum information and computation, and their connections to various disciplines in physics, such as high energy physics, condensed matter physics, statistical physics
