Physicists Joking Around

 A little strange for a post, but I found this interesting video on YouTube that I found nice. I found this after searching for ``physicist breaks down", which is a gag video from The Big Bang Theory show, where Sheldon drinks alcohol and jokes around. I have linked both the videos, in case you want to have some time off from work.

Theoretical Physicists having fun & cracking jokes

Physicist Melts Down (TBBT)

Paper by Flam, Leutheusser and Satischandran

 A new paper had appeared yesterday by Flam, Leutheusser and Satischandran, called Generalized Black hole entropy is von Neumann Entropy. I have to read this, although I am having to go through Liu and Leutheusser's three previous works for my works.

Generalized Black Hole Entropy is von Neumann Entropy

Papers for beginners in AdS/CFT!

 For people who are interested in what I am doing (in AdS, while dS has some other works as well), here are some papers that are worth referring to, since most of my works are based around these results. Mainly, the following are people whose works are extensively referred to: Raphael Bousso, Netta Engelhardt, Andy Strominger, Aron Wall, Tadashi Takayanagi, Veronika Hubeny, Mukund Rangamani, Shinsei Ryu, Geoff Pennington, Ahmed Almheiri, Juan Maldacena, Ed Witten, Thomas Faulkner, Aitor Lewkowycz, and Horacio Casini. Of course, there are many others, but in AdS/CFT, these are some of the key ones. Keep in mind that these are not in any chronology; I am working on a review, in which perhaps I will detail on this.

Holographic Derivation of Entanglement Entropy from AdS/CFT (Ryu-Takayanagi),

Coarse Graining Holographic Black Holes (Engelhardt, Wall),

Quantum Extremal Surfaces: Holographic Entanglement Entropy beyond the Classical Regime (Engelhardt, Wall),

Maximin Surfaces, and the Strong Subadditivity of the Covariant Holographic Entanglement Entropy (Wall),

Relative entropy equals bulk relative entropy (JLMS),

Recovering the QNEC from the ANEC (Ceyhan, Faulkner),

Relative entropy and the Bekenstein bound (Casini),

Gravity Dual of Connes Cocycle Flow (Bousso, Chandrasekharan, Rath, Mogghadam),

Large and Small Corrections to the JLMS Formula from Replica WormholesFlam, Rath,

Large N algebras and generalized entropy (Chandrasekharan, Pennington, Witten),

Emergent times in holographic duality (Leutheusser, Liu),

Holograms In Our World (Bousso, Pennington),

Entanglement Wedges for Gravitating Regions (Bousso, Pennington),

Canonical Purification of Evaporating Black Holes (Engelhardt, Folkestad),

Local bulk operators in AdS/CFT: a boundary view of horizons and locality (HKLL),

And there are some other works too, but for now I think these are nice. 

Modular flows, operators and AdS/CFT

See Weisbrock's paper on half-sided modular inclusions. This finds a very striking application in Ceyhan and Faulkner's paper on finding QNEC from ANEC, and in Bousso, Rath, Chandrasekharan and Mogghadam's work on the gravitational dual to the Connes cocycle flow. In AdS/CFT, this is very successful, and I think there are some other papers that use modular theory, and I will add some more papers soon.

Pseudo-Hermitian Quantum Mechanics

Lately, I have been caught up with some works requiring me to extensively think about the possibilities of un-Hermitian quantum mechanics. One of these was that the existence of higher spin theories as dS/CFT, initiated by Anninos and collaborators. While I am really naive about this, I think there could be motivations to pseudo-Hermitian quantum mechanics particularly in de Sitter, and with important implications to calculating entanglement entropy. While on this topic, Jacob Barnett arXived his thesis, entitled Locality and Exceptional Points in Pseudo-Hermitian Physics a while back. The appendix of this thesis discusses many elementary aspects of the mathematics involved in the thesis. 

And on the topic of papers in dS, there is a nice paper today that I wish to read eventually: Unitary-Preserving Holography in dS$_d$ [2309.02122]. 

Complexity paper: Timelike separated QES

 Netta Engelhardt, Geoff Pennington and Arvin Shahbazi-Mogghadam had a paper on arXiv two days ago (the most recent posting*) on quantum extremal surfaces and Python's lunch. Interestingly, it also describes a kind of quantum extremal surface that resembles a de Sitter bifurcation surface.

*Friday, 1st September, most recent since arXiv papers are not announced on weekends.

Twice Upon a Time: Timelike-Separated Quantum Extremal Surfaces [2308.16226]

Good Will Hunting

 Just two clips from Good Will Hunting (1997). This happens to be my comfort movie, which I would recommend to anyone wanting to see a movie feel like a nice hug. Matt Damon and Robin Williams definitely made this movie one of (if not) the most perfect movie. It is with reason that I ranked this first on my movies page. 

• Perfect for Each Other: Sean (Robin Williams) telling Will (Matt Damon) about wife, and what made their relationship what it was -- the little things. One of the most heartfelt scenes I have seen in a movie. The camera shaking when Sean jokes about his wife, the suiting silence -- there are many things I can say just about this one scene.
• It's Not Your Fault: Sean telling Will that his father causing his traumatic childhood is not something he has to reflect himself with. Again, one of the most heartfelt clips in a movie ever, particularly the almost child-like way Will holds Sean, who broke the emotional baggage that Will built up all his life.
• Gotta Go See About a Girl: Sean talking about how he met his wife, missing the game, to which Will is perplexed.