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Special Seminar: "Quantum thermalization in interacting spin ensembles" presented by Pai Peng

Event Type
280 Materials Research Laboratory
Dec 3, 2021   11:00 - 11:50 am  
Pai Peng, Ph.D. Candidate, Massachusetts Institute of Technology
Hannah Stites

Quantum thermalization in interacting spin ensembles

Abstract: How a many-body quantum system thermalizes under its internal interactions is an important question with fundamental and practical impacts on quantum information science, condensed matter physics, and quantum engineering. Nuclear spins in solids, featuring large system size, long coherence time and excellent controllability, provide a great playground to study quantum thermalization. In this seminar I will present three recent experimental results -- (1) the emergence of classical hydrodynamical phenomena from thermalizing quantum systems; (2) prethermalization in periodically driven systems [1-3]; (3) robust dynamical decoupling of interactions using reinforcement learning techniques [4]. These results not only shine a light on various important questions in quantum thermalization but also provide new quantum control techniques that can be generalized to other platforms.

[1] PP, C. Yin, X. Huang, C. Ramanathan, P. Cappellaro. Nat. Phys. 17, 444 (2021).
[2] C. Yin, PP, X. Huang, C. Ramanathan, P. Cappellaro. Phys. Rev. B 103, 054305 (2021).
[3] K.X. Wei, PP, O. Shtanko, I. Marvian, S. Lloyd, C. Ramanathan, P. Cappellaro. Phys. Rev. Lett. 123, 090605 (2019).
[4] PP, X. Huang, C. Yin, L. Joseph, C. Ramanathan, P. Cappellaro. arXiv:2102.13161.

Bio: Pai Peng is currently a 5th year Ph.D. student in Paola Cappellaro’s lab at MIT, working on quantum many-body dynamics using solid state NMR technique. Before coming to MIT, he worked with Yun-Feng Xiao at Peking University on cavity QED theory and with Hartmut Haeffner at UC Berkeley on trapped ions. He has been awarded MathWorks Engineering fellowship at MIT, and Wei Ming scholarship at Peking University.

This event will be in-person only.

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