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New member in our group, welcome Bowen!

Bowen Ouyang (欧阳博文) joined our TheoryLab group as an undergraduate student working on applied holography! Welcome Bowen!

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A time crystal in a black hole, new PRL paper

Can we make a system that breaks time-translations spontaneously — a time crystal — as an ordinary crystal does with spatial translations? Yes!

Can we make this time crystal holographic and embed it in a gravitational solution with a black hole? Yes!

Check our new PRL work: Phys. Rev. Lett. 131, 221601

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New member in the group, welcome Peng Yang

Peng Yang will join our research team in September 2023, welcome to the group!!!

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“Topological defects reveal the plasticity of glasses”: a News and Views Commentary in Nature Communications

A cartoon of the idea behind the identification of topological defects in the vibrational modes of glasses.

Professor Matteo Baggioli (STJU and WQC) summarizes the recent breakthroughs in the search of topological defects in amorphous materials in a News and Views commentary for Nature Communications.

https://www.nature.com/articles/s41467-023-38549-8

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New members in the group, welcome Sha and Xue

Sha and Xue joined our research team, welcome to the group!!!

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New member in the group, welcome Kyoung-Bum

Kyoung-Bum will join our group from September 2023 as a postdoctoral fellow. Welcome to the group!!

Kyoung-Bum Huh
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New paper in Reviews of Modern Physics

A pictorial representation of the holographic duality mapping the gravitational dynamics in black hole geometries to that of strongly coupled dual field theories. The checkerboard structure represents the translational order in the dual condensed matter systems.

The holographic duality, “holography” in short, is a powerful theoretical tool discovered in the context of string theory 25 years ago. In its bottom-up formulation, holography is a duality between weakly coupled classical gravitational theories in d+1 dimensions and strongly coupled large N field theories in d dimensions which opens a new window towards a nonperturbative formulation of quantum gravity but also provides an effective method to describe quantum field theory at strong coupling. Nowadays holography has become an important complementary and highly interdisciplinary technique used in many research fields including condensed matter, hydrodynamics, quantum information, out-of-equilibrium physics, QCD and many more.

In the context of condensed matter, important new developments in the recent years have been related to the introduction of translational symmetry breaking in the dual field theory in all its forms. This is a fundamental ingredient to describe condensed matter phases and their transport properties and it was strongly motivated by unsolved questions in the realm of high-Tc superconductors and strange metallic behavior. Importantly, these new discoveries have brought an enormous impact into our modern understanding of viscoelasticity and effective theory description of dissipative systems with broken translations. The holographic methods have not only revealed several missing pieces in the hydrodynamic and effective field theory formulations but also brought to light novel universal relations regarding the physics of pseudo-goldstone modes which have been later confirmed and explained with more standard field theory computations.

Professor Matteo Baggioli from Shanghai Jiao Tong University and professor Blaise Gouteraux from École Polytechnique Paris have reviewed these exciting findings and discussed the main research directions and open questions for the future in a recent Colloquium which has been published in Review of Modern Physics, the most renowned review journal in physics.

Reference.  M.Baggioli and B.Gouteraux, “Colloquium: Hydrodynamics and holography of charge density wave phases”, Review of Modern Physics

Rev. Mod. Phys. 95, 011001 (2023) – Colloquium: Hydrodynamics and holography of charge density wave phases (aps.org)

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Ready for a new year !

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Mandy and Youbin, welcome to our group !

Mandy and Youbin are joining our research group as administrative assistants. We are happy to have them on board and we thank them for their support.

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Lectures on spectral methods in numerical relativity by S.Grieninger

Sebastian Grieninger from IFT Madrid will give a set of 5 lectures about spectral methods in numerical relativity the week between Monday 25th of July and Friday 30th of July. The lectures will take place each day online (link will be shared beforehand) at 3 pm China time, they will be focused on the usage of spectral methods for applications of Holography and they will include explicit tutorials and examples.