Ian Jauslin

## Videos

On this page, I have collected the videos in which I have appeared, as well as the talks I have given for which videos are available.

I started a youtube channel in which I will post videos on mathematics and physics accessible to a wide audience (no prerequisites).

• Entropy and Irreversibility
What is entropy? And what exactly does it measure? These are very important questions that are foundational to the theory of thermodynamics, and yet, it's not always so easy to find satisfactory answers. In this video, I will give a simple and clear definition of thermodynamic entropy, and show that it measures irreversibility.

• A proof of Bell's inequality
This is a companion video to "(Non-)Locality, the Einstein-Podolsky-Rosen argument, and Bell's inequality" in which I discussed the relation between Bell's inequality and locality. In this video, I give a full proof of Bell's inequality in a very general setting, starting only from the assumption of locality.

• (Non-)Locality, the Einstein-Podolsky-Rosen argument, and Bell's inequality
In this video, I discuss how the winners of the 2022 Nobel Prize in physics have shown that the world is NOT LOCAL. This means that, at least in principle, it is possible for an action taken somewhere on Earth to have an effect arbitrarily far away, even in the most remote corners of the universe. The Nobel Prize winners achieved this by proving that an inequality, called Bell's inequality, is violated in nature. In this video, I describe the argument made by John Bell that a violation of Bell's inequality implies that there is no locality. This argument starts from the Einstein-Podolsky-Rosen "paradox" (EPR), which I describe as well.

### Educational videos and podcasts

• Here is my Interview with Místo problémů, a science podcast from the Czech Republic. Their interviews are typically in Czech, but they kindly allowed me to do the interview in English! It's probably available wherever you usually get your podcasts, as well as here:

• I was interviewed by La Dimoni de Maxwell, who hosts a youtube channel with educational science videos, most of which are in Catalan (though my interview is in English). I highly recommend her channel to those of you who speak Catalan: the content is of exceptional quality!

### General audience talks

• [Id18]: Liquid crystals: order upon disorder
Celebrating Ideas 2017-18, Institute for Advanced Study, Princeton, New Jersey, USA, Apr 26 2018

• [LwM18]: Liquid crystals and the Heilmann-Lieb conjecture
Lunch with a Member (IAS Friends), Institute for Advanced Study, Princeton, New Jersey, USA, Apr 06 2018

• [LwM17]: Mathematics and Music: Vibrating Strings and Overtones
Lunch with a Member, Institute for Advanced Study, Princeton, NJ, USA, Mar 03 2017

### Research seminars

• [HaMPS20]: Liquid crystals and the Heilmann-Lieb model
Harvard University, Cambridge, Massachusetts, USA, Mar 31 2020

• [Pr20]: A simplified approach to interacting Bose gases
Princeton University, New Jersey, USA, Mar 03 2020
video

• [IASm17]: High density phases of hard-core lattice particle systems
Member seminar, Institute for Advanced Study, Princeton, New Jersey, USA, Oct 30 2017

• [IAS17]: Nematic liquid crystal phase in a system of interacting dimers
Institute for Advanced Study, Princeton, New Jersey, USA, Oct 25 2017

• [IASp17]: Liquid crystals and interacting dimers
Postdoctoral talks, Institute for Advanced Study, Princeton, New Jersey, USA, Sep 29 2017

• [IAS16]: Strong-coupling renormalization group in the hierarchical Kondo model
Institute for Advanced Study, Princeton, USA, Sep 21 2016

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