Bourbaki lives! And Nicolas may have to be revived in his original form, if geopolitics continue down this trend.

https://www.bourbaki.fr/TEXTES/Exp1231-Hairer.pdf

#bourbaki #maths #qft #math #physics

If you believe that empowering students to ask their own questions is one of the most powerful ways to cultivate critical thinking, curiosity, and problem solving...
Then...
Consider the upcoming conference: Teaching Students to Ask Their Own Questions: Best Practices in the Question Formulation Technique (QFT).
A great opportunity for educators, coaches, and leaders committed to deeper learning.
https://www.gse.harvard.edu/professional-education/program/teaching-students-ask-their-own-questions-best-practices-question
#education #CriticalThinking #StudentVoice #QFT

#QuantumInformation #Panpsychism Explained and few can do so like #FedericoFaggin #AIhistory #QFT #consciousness #drones #funride

“Mathematics evolves out of consciousness. Therefore, mathematics cannot explain consciousness“

https://www.youtube.com/watch?v=0FUFewGHLLg

In the song "I shall be released" by The Band, I always felt the lyric "they say every distance is not near" to be a statement on the locality and causality of quantum field theory. Just me?
Do folks out there have other science-y interpretations of famous lyrics?
#TheBand #BobDylan #QFT

I'm curious, is there a QFT book written in the style of Misner, Thorne, and Wheeler's "Gravitation"?

#physics #qft

My article together with Kimia Shaban has appeared in JHEP today. We have examined the #statistics of #Feynmangraph s in #QFT , and how they can be exploited to efficiently compute #amplitudes at high loop order.
The article is open access, and the dataset is freely available from my website if you want to explore statistics and correlations yourself. Predicting the values of these Feynman integrals could also be interesting as a test case for #machinelearning
https://link.springer.com/article/10.1007/JHEP11(2024)038

Any physicists around who can help me understand something?

How should I picture neutrinos in a QFT context? If particles are ripples in their field, and we can detect only a teeny-tiny fraction of neutrinos, what does that say about their field? Is it somehow quiet, and only ripples when we make a chance detection of a neutrino? Is it constantly rippling, but so noisily we can hardly ever detect a signal in it?

Or have I got this all wrong?

(Boosts OK, of course.)

#neutrino #physics #QFT

Our #workshop on #combinatorics in fundamental #physics has three topic days, November 26-28.

Day 1: Random Geometry for #Quantum #Gravity

Random geometry is a powerful mathematical framework for studying quantum gravity by modeling it as a statistical physics system, where each Boltzmann configuration corresponds to a spacetime geometry selected from an ensemble with a well-defined probability measure. When considering quantum gravity from a lattice perspective, where spacetime is discrete, the challenge of defining a suitable probability measure becomes a combinatorial problem.

Day 2: #Causal Set Theory

Causal Set Theory is an approach to Quantum Gravity in which spacetime is fundamentally discrete and takes the form of a locally finite partial order, or causal set. The twin questions leading much of the research in this field are: How does the continuum physics of General Relativity arise from an underlying discreteness? And what is the quantum nature of a discrete and dynamical spacetime? #causalset

Day 3: Combinatorics in Perturbative #QFT

A unique feature of quantum field theory is the central role that combinatorics plays: from generating Feynman graphs of scalar models to combinatorial maps and higher graph-like objects of sophisticated frameworks such as matrix-/tensor- and group field theories to renormalization Hopf algebras, and the theory of resurgence and asymptotic power series, to name but a few. The focus of this workshop will be on matrix-/tensor-/group-field theories and graph complexes.

Registration is open for everyone, and of course, free of charge.
https://indico.mitp.uni-mainz.de/event/422/registrations/245/

Question for the #QFT people here: What's your favourite way to explain the effective action Γ[Φ]?

The most frequent explanation I see is "quantum analogue of the classical action", but that doesn't really seem to cut it - after all, classical field theories work completely differently from quantum field theories. Most notably, in classical field theories, you don't have correlation functions - you just have a unique field that describes the current state of your system.

Two years ago, I began writing my #doctoralThesis in theoretical #physics. Most effort went into giving a very detailed pedagogical account of what the #renormalization #HopfAlgebra in #QuantumFieldTheory does, and why it is natural and transparent from a physical perspective.
One year ago, my referees recommended in their reports to publish the thesis as a book, and today I received the printed copies!
It was exciting to go through all the steps of actually publishing a book, and I hope that it will be of use to convince physicists that the Hopf algebra structure in #QFT is not a weird mathematical conundrum, but it actually encodes the very way physicists have been thinking of renormalization since the 1950s: Parametrize a theory by quantities one can actually measure, instead of fictional expansion parameters.
https://link.springer.com/book/10.1007/978-3-031-54446-0

xkcd 2933: Elementary Physics Paths
https://xkcd.com/2933/
https://www.explainxkcd.com/wiki/index.php/2933:_Elementary_Physics_Paths

Title text: ==COSMOLOGY==> 'Uhhh ... how sure are we that everything is made of these?'

#xkcd #cartoon #humor #physics #QFT #ParticlePhysics

I recently discovered an excellent #math article by Krajewski and Martinetti that I had overlooked so far: https://arxiv.org/abs/0806.4309
Basically, renormalization of #Feynmangraph s in #qft is organized in terms of rooted trees, and so are solutions to differential equations, concatenation of differential operators, numerical integration schemes, and the Hopf algebra of power series. It is intuitively clear that all these things must be closely related, but I wasn't aware that there is this article where the relations are actually spelled out in detail. They also include a derivation of Wigner's semicircle law for Gaussian random matrices in the rooted-tree formalism, which is something I didn't think about at all. Learned another unexpected connection 😀 .

New #physics preprint https://arxiv.org/abs/2403.16217 together with Kimia Shaban! Computing #Feynmangraphs in #qft is hard, but at least for periods at large loop order, their value can be estimated from properties of the underlying graph with a few percent accuracy. This allows us to identify which (out of millions) of graphs contribute most to physical predictions. We wrote a proof-of-concept Monte Carlo program which allows us to compute the primitive beta function of phi4-theory 1000-times faster than the current best approach (which would be using uniform random samples of graphs). This shows that although at high loop order the number of graphs is enormously large, they are "sufficiently regular" that one can get good estimates of physical observables with methods of #statistics instead of solving each and every Feynman integral.

Quantum Gradient Time Crystal Dilation breaks the assumption that gravity equals metric curvature alone.

Unveiling the Fabric of the Cosmos with QGTCD, a Unified Field Theory, Part II: Christoffel Symbols, a Slow Metric Tensor, Theoretical Considerations & Challenges. #physics #gravity #quantum #QFT #time #crystal https://www.svgn.io/p/quantum-gradient-time-crystal-dilation

Arsenal 3-1 Liverpool: A deserved loss for awful Reds - #LiverpoolFC - This Is Anfield
#QFT #YNWA #LFC #ARSLIV
https://www.thisisanfield.com/2024/02/arsenal-3-1-liverpool-a-deserved-loss-for-awful-reds/

In quantum information we don’t embezzle money, but entanglement.
In our new work, we show that one can embezzle entanglement out of “nothing”: namely the vacuum.
This turns out to be closely connected to Connes’ classification of type III von Neumann algebras.

If you want to learn more about this, we have a short paper (https://arxiv.org/abs/2401.07292) and a long technical paper (https://arxiv.org/abs/2401.07299) for you.

#quantum
#entanglement
#qft
#quantuminformation
#qip24

#Turnip’s Liberal Appeasers - The American Prospect @ryanlcooper

The amount of loser, kick-me energy on display here is nigh indescribable.

#qft #symps
https://prospect.org/politics/2024-01-05-trumps-liberal-appeasers/

Yesterday, I gave a seminar on Entangled Relativity at the laboratory 'Theory and Universe' at the Paris Observatory: https://youtu.be/viTu7SNkvfU

Please share widely, all too often I meet people who have never heard about this. And I think it's really too bad: not every day do we have a new theory that reduces the number of elementary constants! Moreover, in this theory, concepts like the #Planck length and time become obsolete, potentially bridging the gap between #QFT and #gravity !!

"Dimensionale Physik"

"Theorie zur Vereinigung der Allgemeinen Relativitätstheorie mit den Quantenfeldtheorien"

https://dimensionale-physik.de/

#QFT --> #ART
#ART --> #QFT

#Raumzeit #Gravitation ...

tyrantisterror:

sof-gigante:

i-was-today-years-old-when:

i … Continue reading “”

https://syphoncontinuity.com/blog/tyrantisterror-sof-gigante/