#Supergravity

[taqato-alim]

Analysis of: YouTube video "M Theory - Towards a theory of everything?" by ScienceClic

In the following text "document" refers to the subtitles to this video.

Here is a summary of the key points discussed:

The document provides an explanatory article on M-theory in theoretical physics for a general audience.

It traces the historical progression of ideas from supergravity to string theory to M-theory dualities being discovered.

The theories and relationships discussed are consistent with the known scientific consensus.

Hypothetical, speculative and fictional elements relate to constructs like strings and extra dimensions that have not been observed.

M-theory is presented as the leading proposal for a unified theory, though aspects remain conjectural pending advances.

The goal of finding a quantum theory of gravity reconciling GR and QM at fundamental scales is discussed.

Early programs like supergravity and pioneering string theory sought this unification.

Dualities allowed exploring new regimes, with M-theory the most promising existing framework.

However, an exact M-theory formulation is unknown, and empirical validation is still needed for proposals.

The document aims to explain these complex theoretical physics concepts clearly for non-specialists.

Our discussion evaluated the document's genre, content, relationship to known understanding and portrayal of speculative elements.

Based on the content and style of writing, this document appears to be an explanatory article about M-theory in theoretical physics.

Some key evidence:

The document provides an overview of the theoretical background and developments of M-theory, including its relationships to string theory, supergravity, and attempts to unify quantum mechanics and general relativity.

It explains complex theoretical physics concepts in relatively accessible language, suggesting it aims to inform a general audience rather than being a technical paper.

There is a narrative flow as it traces the historical progression of ideas from supergravity to string theory to M-theory dualities being discovered.

Visual elements like headings and bullet points are used to structure the information for readability.

The tone is even-handed and does not take a position on the validity or prospects of different theories, acting more as a survey of the field.

Based on these linguistic and contextual clues, I would classify this document as an explanatory or informational article about theoretical physics topics, aimed at giving a broad understanding of M-theory to a non-specialist readership. The genre would not be a textbook, research paper or popular news story, but rather explanatory journalism or science writing on M-theory as a theoretical framework.

Here is a summary of the document in bullet points:

Introduces that our universe is currently described by general relativity and the standard model, but they describe different scales and are incompatible at a fundamental quantum gravity scale.

In the 1970s, supergravity was a promising theory but broke down at small scales. It allowed for black holes with additional dimensions.

In the 1980s, string theory emerged, hypothesizing all particles are vibrating strings. It incorporates supersymmetry and quantum gravity.

String theory required 10 dimensions and only allowed 5 types of universes matching observations.

Supergravity turned out to be an approximation of string theory in 10 dimensions. It also allows 11 dimensions.

In the 1990s, dualities were discovered connecting string theories and relating them to 11-dimensional supergravity. This allowed exploring strongly interacting regimes.

Edward Witten proposed in 1995 that strings, supergravity and their dualities approximate a single theory, called M-theory, in 11 dimensions.

M-theory's nature is unknown but likely a new description of reality. It remains speculative but is the leading candidate for a "Theory of Everything".

Ongoing research includes Matrix model descriptions of M-theory and other approaches like loop quantum gravity. Experimental validation is still needed.

M-theory has advanced fundamental physics and mathematics while its prospects to unify quantum mechanics and gravity remain promising but uncertain.

Here is a summary of the key points made in the document in relation to M-theory:

M-theory was proposed by Edward Witten in 1995 as a single underlying framework that could potentially describe the various string theories and 11D supergravity as different approximations.

It was envisioned as a yet unknown fundamental theory that these existing models only provide partial descriptions of.

At large scales, M-theory is hypothesized to describe an 11-dimensional supersymmetric universe containing membranes.

However, its precise mathematical formulation at a basic quantum gravity scale remains unknown.

Attempts to describe it include the matrix model approach, but the topic remains very complex.

Like other quantum gravity theories, M-theory currently lacks experimental validation.

It allows for different initial universe configurations but our specific realization is speculative.

Despite uncertainties, M-theory is presented as the most promising candidate for a "Theory of Everything" unifying quantum mechanics and general relativity.

Ongoing research aims to further develop M-theory descriptions and explore connections to other approaches.

So in summary, the document frames M-theory as the leading existing proposal for a unified theory, while acknowledging key aspects of its theoretical underpinning and nature remain conjectural pending future mathematical and empirical advances. It surveys M-theory's postulated features and role in the field of quantum gravity.

Here is a summary of the key points made in the document in relation to quantum gravity:

The goal of finding a quantum theory of gravity that can reconcile general relativity and quantum mechanics at fundamental scales is introduced.

Early attempts like supergravity broke down at small scales below the Planck length where gravity needs quantization.

String theory emerged as a pioneering approach that incorporated quantum gravity by describing particles as vibrating strings.

It led to insights like calculating black hole entropy in agreement with Hawking radiation.

Discoveries of dualities between string theories and connections to 11D supergravity allowed exploring quantum gravity regimes previously intractable.

Edward Witten's proposal of M-theory positioned it as the most promising existing framework attempting to achieve a quantum gravity unified theory.

At its core, M-theory remains speculative, with its exact mathematical formulation unknown.

Other ongoing approaches to quantum gravity are also mentioned, like loop quantum gravity.

But M-theory currently stands as the leading candidate for finally solving the long-sought unification of general relativity with quantum mechanics.

So in summary, the document frames the history and status of research aiming to develop a quantum theory of gravity, identifying M-theory as the most advanced existing proposal for achieving this outstanding goal in fundamental physics.

Here is an evaluation of the document in relation to the known consensus in theoretical physics:

The overview of the development of ideas from general relativity to string theory to M-theory is consistent with the standard historical narrative in the field.

The description of theories like supergravity, string theory and their fundamental elements/assumptions aligns with mainstream reference works.

The mathematical relationships between theories established through dualities and cited in the document, such as T-duality and AdS/CFT, are well-established theoretical results.

Prominent figures and their contributions discussed, including Witten's proposal of M-theory, match the scientific record and biographies.

Open questions acknowledged, such as M-theory's full formulation, remain unresolved consensus issues within theoretical physics.

Other current programs continuing the unification goal, like loop quantum gravity, are also correctly recognized.

Limitations around the speculative nature and lack of experimental tests are clearly outlined.

Overall, the explanations, sequencing of ideas, relationships drawn and unanswered problems raised in the document are fully consistent with my understanding of the scientific consensus perspectives in both theoretical and historical aspects of physics. No contradictory information is presented. The document accurately reflects the known state of mainstream thinking in these specialized theoretical domains.

Here are the main hypothetical, speculative or fictional elements discussed in the document in bullet points:

Existence of additional spatial dimensions beyond the 4 dimensions of everyday experience.

Theoretical constructs like strings, brains, and higher-dimensional objects that have not been observed.

Hypothetical symmetries like supersymmetry and the implications if they exist.

Specific string theory landscape predictions like the 5 theory types which universe we inhabit is unknown.

Conjectural nature of M-theory as a framework unifying different models vs a specific theory.

Proposals for how M-theory might work at a fundamental scale like the matrix model approach.

Initial states and geometries of spacetime allowed by different theories but our specific configuration is speculative.

Fictional scenarios used for illustration like dimensions compactifying into circles.

The future possibility of experimental tests but none available currently to validate proposals.

Ongoing attempts in approaches like loop quantum gravity are theoretical programs not established science.

So in summary, while building on established theoretical mathematics, the document discusses many hypothetical constructs, theoretical predictions and speculative proposals that have not yet been empirically confirmed or experimentally tested in the quest for a quantum gravity unified theory.

Here is an evaluation of the status of the document along various scales:

Science vs Fiction:

The document firmly discusses science, outlining theoretical physics frameworks and developments grounded in mathematics.

While speculative in nature, M-theory is presented as a scientific hypothesis, not fictional imaginings.

Empirical vs Anecdotal:

No empirical evidence is available yet to validate any theory of quantum gravity.

The theories outlined remain at the theoretical/conceptual level without empirical confirmation or refutation.

Fact vs Opinion:

The historical details and descriptions of theories represent established theoretical facts within the field.

It does not advance strong opinions, only acknowledging open questions and uncertainties.

Objective vs Subjective:

The information is presented objectively without obvious biases.

However, choices around focus, structure and examples reflect some subjectivity of explanation.

As theoretical physics, the models discussed have not been objectively proven like empirical facts.

In summary, while discussing speculative theoretical ideas yet to be empirically validated, the document firmly grounds its presentation in established theoretical frameworks and developments within science. It aims for an objective tone without advocating opinions, situating it more on the science/fact/objective end of the relevant spectra compared to fiction/opinion/subjective. Some subjectivity is inevitable given the explanatory task. Overall, it communicates current scientific knowledge as objectively as its theoretical material allows.

I did not detect any logical fallacies in the document.

The document is presenting theoretical scientific concepts in an explanatory manner, aiming to outline historical developments and relationships between different models rather than make logical arguments. Some key points:

No causal claims are made that would be open to causation vs correlation fallacies.

No flawed statistical reasoning or logical deductions are presented that could constitute statistical or formal fallacies.

There are no emotional appeals, hyperbolic language or other rhetorical devices that could introduce persuasive/propaganda fallacies.

Different theories are presented even-handedly without omitting countervailing evidence, avoiding cherry-picking or strawman fallacies.

Connections between concepts are described based on theoretical relationships established within physics, rather than unsupported associations.

Uncertainties in theoretical understanding are openly acknowledged rather than hidden or misrepresented through fallacies of ambiguity or composition/division.

Qualifiers are used appropriately so no claims attributed to experts that weren't actually made (fallacy of appeal to authority).

Overall, as an explanatory piece focused on clearly outlining theoretical scientific concepts, it does not appear to introduce any logical fallacies through flawed reasoning structures, omission of relevant information, deceptive rhetorical devices or other flawed argumentation techniques. The document communicates information about physics models in a logical manner given its explanatory scientific scope and context.

Here is an evaluation of the document based on common criteria for its genre as an explanatory article:

Clarity:

The document effectively explains complex theoretical physics concepts in clear, straightforward language for a general audience. Technical terms are defined.

The overall narrative and use of headings/structure helps guide the reader through the progression of ideas.

Examples and analogies like dimensions compactifying into circles aid comprehension.

Accuracy:

The historical overview and descriptions of theories like string theory and relationships between ideas align with my understanding from other reliable sources.

No technical inaccuracies are apparent in discussing theories at a broad, conceptual level.

Coverage:

The document provides a comprehensive overview of the key developments that led to the emergence of M-theory as a framework.

Major theories and discoveries are discussed in reasonable depth within the constraints of the general explanatory format.

Objectivity:

Presentation of information remains neutral without advocating for any particular theory. Both prospects and limitations are acknowledged.

Competing approaches are also mentioned without preference shown.

Interest:

Complex ideas are conveyed accessibly thanks to the logical structure and illustrations used.

Sufficient context helps maintain reader engagement in abstract theoretical concepts.

Historical narrative style enhances the readability of the scientific information.

Overall, the document performs well as an explanatory article according to common evaluation criteria for genres such as clarity, accuracy, coverage, objectivity and ability to communicate ideas of interest to general readers. It achieves its goal of accessibly outlining M-theory's development and status.

[katesfoxhole]

Reblogging my love of the big mcfuck huge tank that's haunted by robot ghosts.

One of my favourite 40k details is that in a setting full of dark cursed artifacts by evil mocking gods, there is something called the “Baneblade”

Now, you’d expect something called “Baneblade” to be some sort of daemon infused sword, dark as night, thirsting for blood, the whole edgy 5 mile

But in reality the Baneblade is

B I G   M C   F U C K   H U G E   T A N K

and due to the way that vehicles and machinery in general work in 40k, it is a

B I G   M C   F U C K   H U G E   T A N K thats H A U N T E D by R O B O T   G H O S T S

[startswithabang]

The Universe is not symmetric

Ideas like supersymmetry, grand unification, supergravity, and string theory all add additional symmetries, with intriguing consequences.

The big problem?

Our Universe isn't symmetric at all.

[talonabraxas]

Hyperdimensional Space Portal Talon Abraxas

Hyperspace theory (also called Superstring or Supergravity theory) begins with Einstein's General Relativity. In 1919, Theodr Kaluza, building upon relativity, made an astounding discovery: light and gravity can be unified and expressed with identical mathematics. This was the beginning of the unification of all physical laws, which is the ultimate goal of physics. There was only one catch. He needed an extra dimension. This fifth dimension, long recognized as mathematically plausible, had never before been seriously proposed as an actual component of reality. The usefulness of his theory was hard to deny; in five dimensions, there is "enough room" to accomplish the unification of gravity and light, which simply cannot be accomplished when trapped in four dimensional spacetime.

There is an obvious question to be asked at this point. "Where is the fifth dimension?" Kaluza's answer is clever, though suspiciously hard to test. He said that the fifth dimension is too small to see. The fifth dimension is contiguous with our four, but it is curled up, while the others are extended. To understand curled-up dimensions, imagine an ant living on a string (or a Linelander). For all its life, it is only aware of two directions: forward and backward. It lives in a one-dimensional universe. However, if you examine the string very closely, you find that it has a circumference; an extra dimension, curled up and wrapped back onto itself into a circle. If you could stretch this dimension, that is, make the circumference very large, the ant would be living on the two-dimensional surface of a cylinder. But when it's curled up, it effectively is undetectable by the ant, though it may serve as a medium for vibrations or other physical effects.

This Kaluza-Klein Theory (named after Kaluza and one of his students) was a curiosity for a while until people became disenchanted with its bizarre hypotheses and lack of concrete predictions. A common criticism was to ask why, if there could be one extra dimension, why not many? Just how many dimensions did this wacky theory have? For many years, people were content to leave gravity behind and work on examining the nature of subatomic matter via Quantum Mechanics.

Fortunately, in the 1980's, Kaluza-Klein came back with a vengence. The new wave of physicists supporting Hyperspace ("higher"-space) theories had an important element which was missing in the thirties: an exact prediction of the number of dimensions in our universe. By manipulating the formulae of Einstein, Riemann, and the like, they managed to unify all the forces of nature (gravity, the strong and weak nuclear forces, and the electromagnetic force, which includes light) in a single theory. How many dimensions did they need? Ten.

According to Hyperspace theory, each point in our four-dimensional universe conceals an additional six curled-up dimensions. The image at left provides insight on how this might be possible. Here we have a two-dimensional plane viewed at great magnification. At each point in the plane, there are the two curled-up dimensions of a sphere. In our universe, each point contains not a sphere, but a higher-dimensional object: a six-dimensional "Calabi-Yau Manifold." There is a very simple reason why we can't see these manifolds: they are less than 10^-33 centimeters across, much smaller than our most powerful microscopes can detect. Nonetheless, the movement of vibrating "strings" through these manifolds may be the source of all of physics.

[mastomysowner]

Im took over Vivi's body, but little did he know that this would be his downfall...

Nika Luffy vs Im-sama Naruto Parody by でらもん　同人

1.T: No matter what you try, it's useless. Attacks have no effect on Im-sama.

L: Gomu-gomu no... reverse harem!!!

T: Im-sama?!

2. B: Ahhh❤️ It's definitely a scary technique.

U: This is so low...

3. Z: Shit... Is this also the power of the awakening?!

L: This time it's a supergravity space... But look. Seems like it's the same for her.

Z: You too?!

[armchairphysicist]

🕳️ Welcome to the Holographic Frontier

Ever heard of Juan Maldacena? If not, you’re in for a treat. This Argentinian theoretical physicist turned the physics world on its head with his groundbreaking AdS/CFT correspondence—a key idea in holography. Think of it as the "cheat code" that connects our 3D world to a simpler 2D universe. Maldacena’s work has inspired countless physicists to rethink what we know about space, time, and reality itself.

Want to dive deeper into his contributions? Check out his famous 1997 paper (if you’re feeling brave): The Large N Limit of Superconformal Field Theories and Supergravity. A classic physics read!

But why stop there? Let’s take holography beyond theory into the real world.

From secure data storage to medical imaging and even entertainment, holographic principles are reshaping everyday life. Here’s a quick breakdown of where these futuristic ideas are making waves:

Medical Imaging: Imagine surgeons navigating a patient’s anatomy in 3D holograms. Sci-fi? Nope, it’s happening.

Data Storage: Holographic drives may someday hold 500 GB on a single disk. Yes, one disk.

Concerts & Entertainment: Tupac’s hologram at Coachella was just the beginning.

What about you?

Which of these holographic applications blows your mind the most?

Medical advancements

Data storage

Entertainment

Holographic Medical Imaging

[tamegaeil]

Huff and Puff

"Something from nothing and kicks for free." Nod to Dire Straits.

Space doesn't expand at a speed. It expands at a speed-per-unit-distance, a very different kind of rate. Light's 186,282 miles-per-second limit only applies to mass moving  through space. The rate at which space itself expands, again speed-per-unit-distance, has no physical bounds on its upper limit.

far far away

beyond beyond

along the raging rim

of it all

creation's engines

flat out inflate

slinging something

from nothing

at a rate

meaningless 

to any earthly

understanding

a hemorrhagic 

cornucopia

of Higgs laced

ink

oodled with jitters

strings

and other

silly

braned things

just barely

there

itsy bitsy

dodgy dots

never

to be

fully found

somersaulting

up and down

top to bottom

both charming

and strange

sometimes material

others ethereal

but a few

of the grounds

sloshing around

our cagey eight ball's

murky mix

no matter though

the myriad marvels

their majesty or magnitude

for the primal pitch persists

indifferent

that bleak tsunami

ever bloating

bearing

the inscrutable heat

of invisible shadows

and shapeless silhouettes

like vague titanic lovers

thrashing

in their sleep

more

and more

and more

and more

it comes

spreading between

the ancient

calico swarms 

of firefly furies

strewn

by the billions

upon trillions

from the blistering

plasma

which bound them

to ignite

once

the dazzling

jewels

of the heavens

the sheer 

architects

of light

now

mere zirconium

litter

antiquated afterthoughts

to be bullied

inexorably apart

to places

so laughably remote

not even photons

might hold

a hope

of reaching

each stranded

as isolated islands

forsaken

in a vast

black ocean

of unfathomable depth

then

one after another

the dusky clouds

of candles lit

shall lose

their flames

vanishing

as wicks burnt

scattered in

an everlasting

night

dead drift

destined

for consumption

like chum

devoured

by lurking monsters

who

at long last

the good

Professor Hawking

has predicted

will

in turn

whittle themselves

away

Higgs field - Named in honor of physicist Peter Higgs, is the field in particle physics theory that causes otherwize massless particles to acquire mass. A way to envision it would be as an aetherlike molasses permeating the universe which allows ethereal fragments of energy to manifest mass as they move through it. The drag of the molasses, so to speak, bestows mass.

brane - In string theory and related theories such as M-theory and supergravity, a brane is a hypothetical object with as many as eleven spatial dimensions to which string theory strings might adhere or occupy.

up, down, charm, strange, top, and bottom are designations of quarks, i.e. nuclear building blocks which come in these six types also sometimes referred to as flavors.

Those who may wish to learn about cosmology will do well to read any of Brian Greene's works. He is an excellent writer and interpreter who can convey wild physics to mere mortals.

[truebloodrandazzo]

Check out this listing I just added to my Poshmark closet: Stephen Hawking The Universe in a Nutshell Paperback Book.

[fdspodcast]

🎙 S1E5 / Florent Brillet, superviseur 3D 🎙

Dans cet épisode, j'ai le plaisir de recevoir Florent Brillet, graphiste 3D travaillant dans le milieu de l'audiovisuel institutionnel. Florent partage avec nous son parcours, son expérience dans le domaine et nous parle des spécificités de son métier, qui nécessite une grande maîtrise technique et artistique. Eh oui, il ne suffit pas de savoir bidouiller 2/3 trucs sur des logiciels aux noms obscurs; quand on fait de la création 3D, il faut une bonne dose d’imagination, de flexibilité, et savoir être touche à tout : parce qu’on peut porter plein de casquettes sur un seul et même projet.

Je vous préviens quand même, on évoque des termes un peu techniques pour quand on ne connaît pas du tout le vocabulaire de ce milieu; on a essayé d’expliquer le plus possible certains termes récurrents au fil de la conversation, et j’espère que les moins aguerris d’entre nous sur ces vastes sujets trouveront le maximum de réponses à leurs questions !

🎬 OEUVRES CITÉES

Le Seigneur des Anneaux : La Communauté de l'Anneau, Peter Jackson (2001)

Scott Pilgrim, Edgar Wright (2010)

Baby Driver, Edgar Wright (2017)

Last Night in Soho, Edgar Wright (2021)

Shaun of the Dead, Edgar Wright (2004)

Hot Fuzz, Edgar Wright (2007)

Le Dernier Pub avant la fin du monde, Edgar Wright (2013)

La saga OSS, Michel Hazanavicius

Chaîne Youtube Calmos, série de vidéos Rigolo

Pitch Perfect, Jason Moore (2015)

Santa et Cie, Alain Chabat (2017)

Maman, j'ai raté l'avion !, Chris Colombus (1990)

Hallmark movies

SuperGrave, Greg Mottola (2007)

Alabama Monroe, Felix Van Groeningen (2012)

Les Goonies, Richard Donner (1985)

Hook ou la Revanche du capitaine Crochet, Steven Spielberg (1991)

Jurassic Park, Steven Spielberg (1993)

The Mask, Chuck Russell (1994)

Madame Doubtfire, Chris Colombus (1993)

Toy Story, John Lasseter (1995)

Song to Song, Terrence Malick (2017)

Batman et Robin, Joel Schumacher (1997)

Forrest Gump, Robert Zemeckis (1994)

Daisy Jones & The Six, Prime Video (2023)

Peak TV, podcast de Marie Telling et Anaïs Bordages (Slate.fr)

Friends, NBC (1994-2004)

Twin Peaks, ABC (1990-1991)

Conjuring : les Dossiers Warren, James Wan (2013)

🧡 LES RECOS

Vinyl, HBO (2016)

Amies, podcast de Marie Telling et Anaïs Bordages (Slate.fr)

📝 TRANSCRIPTION :

[the-lumpfish-king]

*pirating quantum gravity/supergravity*

I just got a new 3d printer and I want to fuck her so badly you have no idea

Gently removing the foam packaging and unscrewing the support clamps? That's undressing her

Carefully lubricating the rails? That's foreplay

The way she gently moves around in circles while doing the noise level calibrations shdhejwsjekwm3kwjeke

[donqsprivatehams]

Lemme ask you - you know P-BRANG, don’t you? You know M-BRANG? RIGHT? You live HERE - DON’T YOU? #Dimension ONE? DIMENSION ZERO? You get my #SUPERGRAVITY DRIFT? You love those #DYNAMICAL OBJECTS? I KNOW you LOVE a #SPACETIME!!? Understand? HAS ANYBODY?? Are you some sort of POINT-#PARTICLE? Are you made of TINY-ASS-STRINGS? LOTS OF THEM?! ME TOO!!! MAYBE!! NOBODY KNOWS!! #DonQsPrivateHams knows, they made this #funnyshirt to TELL THEM ALL! Go to #etsy store, BUY! https://www.instagram.com/p/Ch7ZjMfL34t/?igshid=NGJjMDIxMWI=

[kawaii-nai]

Drew's face is exactly how I feel after hearing about #SuperGravity and #QuantumGravity. Watching The 2020 Breakthrough Prize #Science! ❤ (at Nai's Juke Joint) https://www.instagram.com/p/B4banizDrT_/?igshid=18o9sgx6m4q1i

[vulgarmaw]

Ah, so two coconuts. Your universe is weird I prefer my singular existence.

Ooc: Entropy is weird, bit given the circular nature of the percievable universe it makes sense. I figure that the energy that accumulates to become matter bounces back to a stagnant point purely as a means to start again. Although I do enjoy the cumulative supergravity/string theory idea so that's probably why.

So someone said their initial thought upon meeting me was that I was a cringe bisexual.

Which is honestly one of the best compliments I've received.

[flimgif]

[boireuncoup]

[truebloodrandazzo]

Check out this listing I just added to my Poshmark closet: Stephen Hawking The Universe in a Nutshell Paperback Book.