Energy Transport across Conformal Interfaces via Holography

Energy Transport across Conformal Interfaces via Holography

Formal & Physical Sciences Physics PHPhysicsPHUMathematical
🎙 Prof. Shira Chapman 👥 2K 📅 September 8, 2025 ⏱ 100 min 👁 115 📄 expert opinion 🧭 2026-08-16
Available in: English (current) Français

Keywords

conformal interfacesholographyenergy transportreflectiontransmission

Summary

The talk by Prof. Shira Chapman addresses the problem of energy transport across conformal interfaces, focusing on reflection and transmission coefficients. She introduces conformal interfaces as extended objects that split a system into two parts while preserving a large amount of conformal symmetry. In two dimensions, the enhanced symmetry leads to universal results: the transmission and reflection coefficients are independent of the incoming state and are determined by a single parameter, the left-right central charge c_LR. This parameter appears in the two-point function of the stress tensor across the interface. The talk then introduces gravitational holography as a tool to compute these coefficients in strongly coupled theories. Two holographic setups are presented: a thin brane and a smooth interface. In both cases, the transmission and reflection coefficients are computed and compared with the CFT predictions. Preliminary results in higher dimensions are also discussed. The talk concludes with a summary and outlook, highlighting the universality of the results and potential future directions.

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Critical Evaluation

Value of the Information & Strength of the Argument

The talk provides a clear and well-structured presentation of the problem of energy transport across conformal interfaces. The argumentation is solid, building from the definition of conformal interfaces to the universal results in 2D CFT, and then showing how holography can be used to compute the relevant coefficients in strongly coupled theories. The speaker emphasizes the universality of the transmission and reflection coefficients in 2D, which is a non-trivial result, and explains the physical intuition behind the bounds on c_LR. The holographic computations are presented as a way to test and extend these results, and the preliminary higher-dimensional results suggest potential new phenomena. The talk is valuable for researchers in the field, providing both a review of known results and new insights from ongoing work.

Scientific Rigor, Source Quality, Title Accuracy

The talk is based on three published papers and one work in progress, which are cited in the presentation. The speaker is an expert in the field, and the content is consistent with current knowledge in holography and conformal field theory. The title accurately reflects the content, focusing on energy transport across conformal interfaces via holography. The talk is presented at the Isaac Newton Institute, a reputable research institution, and the audience includes experts, as evidenced by the technical questions during the Q&A. The sources cited are relevant and appropriate for the topic.

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Title / Content Match

The title accurately reflects the content: the talk focuses on energy transport across conformal interfaces using holographic methods.

Quality & Reliability

8/10

Talk by an expert in the field, based on published research and work in progress, presented at a recognized research institute. The content is technical and consistent with current knowledge in holography and conformal field theory.

Key Moments

Cited Sources

Concurring Sources

  • INI Seminar page — Event page for the talk, providing details about the seminar series.

Contribution & Novelties

The talk presents new results on energy transport across conformal interfaces using holography, extending previous work to higher dimensions. The main novelty is the computation of transmission and reflection coefficients in strongly coupled theories, which are not accessible via standard CFT methods. The talk also highlights the universality of these coefficients in 2D and provides a holographic derivation of the left-right central charge c_LR.

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Radar Profile

The radar profile shows high scores in technical level and information quality, reflecting the advanced and rigorous nature of the talk. The lower score in information quantity is due to the specialized topic and limited audience reach. Overall, the talk is highly reliable and technically deep.

Reliability 8/10