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We organized HoloChina 2021 in Shanghai and it was a success !!

Together with our colleagues from ITP Beijing and Shanghai University, we organized the annual HoloChina 2021 conference on Holography in Shanghai. It was a success !!

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And we are back on the physics department website !

The discovery of topological defects in amorphous systems and the prediction of the yielding point using the Burgers vector [Jul. 06, 2021] | School of Physics and Astronomy Shanghai Jiao Tong University (sjtu.edu.cn)

https://www.physics.sjtu.edu.cn/en/node/699

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The discovery of topological defects in amorphous systems and the prediction of the yielding point using the Burgers vector

In a recent PRL publication (https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.127.015501), a research team led by professor Matteo Baggioli from SJTU Shanghai and professor Alessio Zaccone from University of Milano, discovered, for the first time, well-defined topological defects in amorphous solids by analyzing the topological structure of the dynamical displacement field under deformation. This new description based on topological higher-form symmetries quantifies the amount of non-affine displacements at the atomic/molecular level and uses it as a topological predictor of plastic events using the geometrical concept of dynamical Burgers vector. The new theory provides a very accurate prediction for the yielding point at the plasticity transition of amorphous solids, and explains the occurrence of shear bands ubiquitously observed in experiments.

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Our liquids at ITP Beijing

Matteo just presented the recent works published in PNAS and PRL at ITP in Beijing!

http://www.itp.cas.cn/kxyj/xshd/xsbg/202106/t20210604_6079523.html

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Matteo appeared in the channel of the university for a video advertisement

Matteo appeared in a video advertisement of the the Physics department of the university!

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Yong Jun defended his PhD thesis today!

Yong Jun defended today his PhD thesis under the supervision of Prof. Keun-Young Kim and he is now ready to join us in Shanghai for the next step of his career. Congratulations Yong Jun !!
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Matteo participated in the Annual Conference and National Congress on Gravity

Matteo attended and presented his recent work in the “GRA 2020/2021 Annual Conference and National Congress on Gravity” in Shenyang, China (23-26 April 2021).

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Giorgio got his Master Degree with Laude !

Our future PhD student Giorgio Frangi just defended his master thesis under the supervision of Matteo, Prof. Alessio Zaccone and Prof. Oriol Pujolas. He obtained the maximum grade and he is ready for his next step!

Congratulations Giorgio !!!

And thanks to Alessio and Oriol for supporting TheoryLab!

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Matteo participated in the 2021 International Workshop on soft matter and Biophysics theories-Youth Forum

Matteo attended and presented at the “2021 International Workshop on Soft Matter and Biophysics Theories—Youth Forum”, which was organized by the Institute of Theoretical Physics, Chinese Academy of Sciences (ITP-CAS) and CAS Key Laboratory for Theoretical Physics, and hosted by Minjiang University.

Minjiang University, Fuzhou, Fujian, March 22nd– 25th 2021

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The distribution of energy states in liquids, 100 years after Einstein and Debye

In an article published in the journal PNAS by Matteo Baggioli, and Alessio Zaccone of University of Milano, the law which governs the distribution of vibrational energy states of liquids has been derived mathematically for the first time. The new mathematical theory by Zaccone & Baggioli solved the problem of obtaining the distribution of these complex energy states by combining the so-called Zeldovich regularization for unstable quantum states with the mathematical theory of distributions by L. Schwartz. The final result provides an equation in closed form for the distribution of energy states in liquids, which goes linear in the frequency, as opposed to the Debye law for solids, which goes quadratic in frequency, and also correctly predicts its temperature dependence.

Universal law for the vibrational density of states of liquids | PNAS