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Physics at Swansea
Приєднався 29 кві 2022
Didier Queloz: The Exoplanet Revolution
The David Olive Distinguished Lecture, October 2023, by Professor Didier Queloz FRS (Jacksonian professor, Cambridge & ETH Zurich, and 2019 Physics Nobel laureate)
Переглядів: 280
Відео
Sean Hartnoll: Entropy -- from Heat Engines to Black Holes and Quantum Computers
Переглядів 1,9 тис.Рік тому
The David Olive Distinguished Lecture, March 2023, by Professor Sean Hartnoll (DAMTP, Cambridge)
Antimatter- from Physics to Application. Professor Mike Charlton, Physics Colloquium 08 03 2023
Переглядів 291Рік тому
The topic of antimatter is introduced by recalling its prediction and discovery in the 1930’s, and a brief history of the subject is given. Positrons have since found numerous applications in atomic and materials science, engineering and medicine, often based upon their annihilation with electrons, their matter equivalent particle. What makes this antiparticle useful as a probe is discussed, an...
Student talks: Spacetime, gravity and quantum fields, by Bill Atkins, Lewis Cole & Luke Piper
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PhD student talks: Swansea Physics IoP/LSW Christmas Lectures
Ministry of sense: Hunting the Higgs, by Dr. Sam Gregson
Переглядів 313Рік тому
Dr. Sam Gregson presents a high energy, and highly interactive session on one of the the most complex scientific and data intensive activities in modern science hunting for new physics in the Large Hadron Collider at CERN (Geneva) !
Stringfest@Swansea FPUK2022, Talk by Joe Conlon (Oxford)
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Joe Conlon (Oxford): Physics at the End of the World Abstract: I study the physics of scale-separated string vacua in the asymptotic regions of moduli space, towards the boundary and far the central regions. Holographic analyses shows striking features of such asymptotic AdS vacua. Viewed from the perspective of a putative CFT, the conformal dimensions of low lying operators take universal valu...
Stringfest@Swansea FPUK2022, Talk by Inês Aniceto (Southampton)
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Inês Aniceto (Southampton): The asymptotics of the late time expansions in relativistic hydrodynamics Abstract: Dissipative relativistic hydrodynamics is expected to describe the thermalised behaviour of strongly coupled fluids such as a strongly coupled super Yang-Mills plasma at late times. This late-time behaviour is accurately described by a hydrodynamic series expansion in small gradients....
Stringfest@Swansea FPUK2022, Talk by Kostas Skenderis (Southampton)
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Kostas Skenderis (Southampton): Holographic 4-point functions in momentum space Abstract: I will give an overview of CFT in momentum space, including renormalization and anomalies. I will then discuss the computation of holographic tree-level 4-point function ins momentum space, their renormalisation and the associated anomalies and beta functions.
Stringfest@Swansea FPUK2022, Talk by Joan Simón (Edinburgh)
Переглядів 742 роки тому
Joan Simón (Edinburgh): A proposal for 3d quantum gravity and its bulk factorisation Abstract: I will discuss a proposal for 3d quantum gravity with negative cosmological constant extending similar ideas, and logic, to the ones used for JT gravity. Using this, I will describe the factorisation of the Hartle-Hawking state for the eternal BTZ black hole compatible with a state counting interpreta...
Stringfest@Swansea FPUK2022, Talk by Nabil Iqbal (Durham)
Переглядів 1332 роки тому
Nabil Iqbal (Durham): Towards an effective theory of anomalous magnetohydrodynamics Abstract: Certain theories of fermions coupled to dynamical electromagnetism are afflicted by ABJ anomalies, in which the non-conservation of a U(1) symmetry current is given by an operator which is a topological density constructed out of the field strength tensor. I will review the symmetry structure of the re...
Stringfest@Swansea FPUK2022, Talk by Costis Papageorgakis (Queen Mary)
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Costis Papageorgakis (Queen Mary): Towards Solving CFTs with Artificial Intelligence Abstract: I will introduce a novel numerical approach for solving the conformal-bootstrap equations with Reinforcement Learning. This method successfully identifies well-known two-dimensional CFTs and can be applied to the study of arbitrary (unitary or non-unitary) CFTs in any spacetime dimension.
Stringfest@Swansea FPUK2022, Talk by Harvey Reall (DAMTP, Cambridge)
Переглядів 1392 роки тому
Harvey Reall (DAMTP, Cambridge): The second law of black hole mechanics in effective field theory Abstract: I will discuss the second law of black hole mechanics in gravitational theories with higher derivative terms in the action. Wall has described a method for defining an entropy that satisfies the second law to linear order in perturbations around a stationary black hole. I will explain how...
Stringfest@Swansea FPUK2022, Talk by Madalena Lemos (Durham)
Переглядів 792 роки тому
Madalena Lemos (Durham): Regge trajectories for N=(2,0) superconformal field theories Abstract: The spectrum of conformal field theories displays Regge trajectories: families of operators whose dimensions are smooth functions of the spin. We discuss the structure of Regge trajectories of the six-dimensional N=(2,0) SCFTs, in particular of operators coupling to the stress tensors super-multiplet...
Stringfest@Swansea FPUK2022, Talk by Sean Hartnoll (DAMTP, Cambridge)
Переглядів 5262 роки тому
Sean Hartnoll (DAMTP, Cambridge): Wheeler-DeWitt states of the AdS-Schwarzschild interior Abstract: I solve the Wheeler-DeWitt equation for the planar AdS-Schwarzschild interior in a minisuperspace approximation involving the volume and spatial anisotropy of the interior. A Gaussian wavepacket is constructed that is peaked on the classical interior solution. Simple observables are computed usin...
Stringfest@Swansea FPUK 2022, Gong Show
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Neil Lambert (Kings) on the STFC Virtual Theory Centre followed by Stringfest Gong Show
Stringfest@Swansea FPUK2022, Talk by Iñaki García-Etxebarria (Durham)
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Stringfest@Swansea FPUK2022, Talk by Iñaki García-Etxebarria (Durham)
Stringfest@Swansea FPUK2022, Talk by Andi Brandhuber (Queen Mary)
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Stringfest@Swansea FPUK2022, Talk by Andi Brandhuber (Queen Mary)
Stringfest@Swansea FPUK2022, Talk by Sameer Murthy (KCL)
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Stringfest@Swansea FPUK2022, Talk by Sameer Murthy (KCL)
Stringfest@Swansea FPUK2022, Talk by Mike Blake (Bristol)
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Stringfest@Swansea FPUK2022, Talk by Mike Blake (Bristol)
Stringfest@Swansea FPUK2022 Talk by Chris Herzog (KCL)
Переглядів 1262 роки тому
Stringfest@Swansea FPUK2022 Talk by Chris Herzog (KCL)
Lab based tests of gravitational decoherence by Prof. Gerard Milburn (Queensland U.)
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Lab based tests of gravitational decoherence by Prof. Gerard Milburn (Queensland U.)
Astrophysics and exoplanets TRAPPIST Weo
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Astrophysics and exoplanets TRAPPIST Weo
Electrostatics, question 5 WJEC Unit 4 paper
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Electrostatics, question 5 WJEC Unit 4 paper
Electrostatics Edexcel Physics 3 Question
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Electrostatics Edexcel Physics 3 Question
A Sunny Future and Solar Power Sheep by Prof. Paul Meredith, Swansea University Physics Webinar
Переглядів 402 роки тому
A Sunny Future and Solar Power Sheep by Prof. Paul Meredith, Swansea University Physics Webinar
Quit watching after 7 minutes. Too many irrevant stupid commercials.
Excellent video. Thank you for sharing. It gets to other things seen and theory. Tunable metamaterial for slits and the orbital energy levels for part of the tunable range. Also defraction gradient and rainbows. Probalistic pathing, angle of cutoff ect. Keep up the good work.
MS shares went down post this
No closed captioning. WHY
Does he partner with Terrence Howard?
Maldacena conjectured that the whole universe is a QC function, implies that life and consciousness, but what algorithm arrives at coherent quantum process giving the error correcting QC function, remains to be deduced. MOST PHISICISTS FAIL TO GRASP THE ESSENCE OF QM.
Interesting to know so much about magnetic monopoles, with bonus knowledge about color fields and how glueballs can be massive as they are magnetic flux lines. What impressed me is the honesty with which Dirac's theory is making new waves and the mathematics involved sounded right and logical. In ten years we may get proper window to 'string' theory.
Equation for monopole : R = ♾️➖1
36:28 high school, sophomore year, physics class, teacher says the same thing about the bird on the high voltage wire, except he phrases it as a question. The class clown (one of the smartest kids, btw, he obviously knew the correct answer) immediately pipes up "because it's standing on only one leg" 😂😂😂
I, too, hate Microsoft. Great talk.
Seems like if we can see electric monopoles when an electron get separated from its proton buddy, then, ignoring everything that could outlaw it, wouldn't you get a magnetic monopole if you had a sun mass of only electrons or only protons? A large mass containing only negative charges or only positive charges? How much electric charges would you need to jump say the light year that separate the two opposite-charge bodies, even if there was nothing between them? How far could opposite-poled magnetic molopoles could see each others? And what if we had a pair of monopoles escaping each others faster than light in an expanding universe, could they still influence each other via some materials in between? Could we have a black hole worth of a monopole? Could you feel them outside of the event horizon? I am probably completely lost, but it's nevertheless fun to try to imagine. Let's keep listening. I taught it is not the electron that goes through both slides, but the wave function, that 'knows' the probability of all possible paths. When the electron hits the wall, only then nature chooses where the electron will appear, based on the probabilities dictated by the wave function. I.e. Nature choose based on the possible paths, since she knows the probability of them all. Sounds like a computer to me. 46:46, are you saying that the 3 quark colors are involved in the -1/3 electric charge of the down quark and the +2/3 of the up quark? The strong force colour dictates the electric charge? That would be odd, considering that the 3 quarks in a proton /neutron keep exchanging colors, witch obviously don't affect the electric charges. I am missing something here. And the color is involved in the magnetic (moment?)? I always found weird the 1/3, 2/3 charge, I tought a quanta of something had to be an integer of sort. 1:00:28 Does the idea of monopole/antimonopole extend to the magnetic pole/antipole?
He is not saying Electric monopoles. We know those exist. Magnetic monopoles on the other hand are tangent to the electric field.
Something wrong with your audio ?
@ 59:50 I guess the search for magnetic monopoles might be used as a test to potentially eliminate many proposed extensions to the Standard Model. [What feature do all these theories have that produces magnetic monopoles? Is it just non-zero curl in the field probability waves?]
Time is a compactified dimension one single Planck second in size. We allow loose coupling and evolve through Kuramoto synchrony a hyperplane of the present. One side matter, the other antimatter. Am inflow here is an outflow from there. Clockwise here is counterclockwise there. The actual form of the manifold is not spherical. It is a single sided closed surface which has two regions separated by a moment of torsion. Each the perfect reciprocal of the other. Surface(cos(u/2)cos(v),cos(u/2)sin(v),sin(u)/2),u,0,2pi,v,0,4pi Notice that 4pi is needed to complete the surface. I have a bundle version as well. Neutron decay cosmology.
Starts 10:31 I'm sure this has nothing to do with the global cult of 'sovereign' banker's militarily enforced Exclusive Economic Zones. A currently cool type of entropy from the forced separation of people from markets.
like #399, LETS GET TO 400, PEOPLE! #RoundNumbers
david tong is a terrific speaker and very generous to share science he is passionate about i have learned so much key fundamental concepts etc are essentially pauses as he considers what he is saying, …thinking …not a robot…
42:02 ...so he gave this argument that the uni verse is made up of positive and negative charges which look like particles act like waves on every group outing to the beach is composed of 7 notes spread across 12 octaves where the ear can hear a few the eye see a few other and the skin can feel the rest at the rate of waved ness converted through a wave funnel when the dreams represent charged fields of elysian green ness when dreamt just the right way so buy this idea now and dream of it later the numbers representing the ideas mean less than the meaning given to the mean which defines the extremes as tooled by the Chemists when told to the Helenes written down by Plato through the mind of Socrates for the benefit of all children because the important idea is that we are stuck together more than blown apart and so what is in the solar system and in all the other galaxies seen revolving around each other we stick together more than blow apart even when heated up to a billionth of a billionth of the surface of the sun which for fun is 140 times the heat needed to keep you simmering through the next toilet paper shortage the ink comes out with a scrub brush and tomorrow is another days righting or writing and you always choose the second one first given the number of seconds in a circle or the number in a smaller circus known as an hour or a smaller circus known as a minute and wala there you are again the second second in a three orbit spin and who knows but the estimate might be off the surface of the sun given the lack of evidence presented from anyone who been there done that so might just be 137*40 as much as any other approximation of a rock of gas having heat might be
48:31 137 in base 6 is 3 4 5 where for all of you a bit rusty on your base 6 3*6^2=108 added to 4*6^1=024 added to 5*6^0=005 summing up to the mysterious number which happens to have a real relationship with a couple of other ideas 4*108=432 an idea to save for a sunny day 24 hmmm where to start with that must have something to do with the distance from the moon and your sly eye 5 this must be week days could not mean anything else
rethink 42:28 M:Σ:Z = 3 * 2 * 1^Z where Z iz ζα in te G ΣΓΣ where every integer imagined in base 10 is a sum of 3^x+2^y+1^z as written down about 3000 years bn in The Timaeus and pointing to the point of the matter in circular profanity in base anything other than 10 there is no integer outside the head of an integer addicted mumber pile where the meaning of numeral has escaped the room after too many positively charged papers written in blue ink claim to fill the gaps left by the evens with other than the odd number tuned to the tune of a bank account more indirectly than to 432 the A^4 which runs the sun as it is flinging pieces of the aether off into the other until the bell rings and Neptune sends a dry idea back by shedding a tear in the line of hydrogen hiding at 432 hz in the clear blue sky back to the action
42:39 Magnetic Monopoles exist as thats with ends and a middle where the ends are this way and the middle is the middle way Magnetic Dipoles exist as thats with poles and a middle where the poles are this way and that way and the middle is the middle way which the last time a witch said the same was the Tao the way which can not be named and is in all things somewhere
32:00 and negatively charged waves for that point of the matter which as all good physi shists know is a force not a tiny rock at any size of rock you want to imagine down to the unit of 1 at which point the rock is not the matter as much as the matter is suddenly renamed in the most magnetic trick of modern sly ants into mysterious magnetism again not counting quartz which counts for itself just ask an Accutron watching the show go by on a slow boat praise the lord of the red dot re defining life as a lost cause of nonsense explanations ex plane ing themseves to them others no more question at this time
19:04 question time not asked Iron is attracted to and attracted by magnet eyezed material:.. could be rubber could be salt could be ozzygen thus appearing as the sun to be monopole in nature no? If the definition of monopole is positive only and attracted to negative poles of magnetic fields then there appears to be an enormous class of thats which fit this idea that way corrollary ly negative thats no? an Electron is a negative charge no? is the electron not a monopole if not why not? because you do not carry an electron bar in your pocket? any {thing} having a net positive charge is a positive monopole until the charge attracting negatives is evened out in an oddly even dribution of positive charges or an evenly odd redistribuxtion of negative charnges? where any magnet you carry around in your pocket is inert until it meets a monopole or runs afoul of a friend charged in the same way on the other end and the other thing is an atom bomb? or deependes on the density of the aether cant wait to hear the answares
And then you follow up with a much shorter and digestible version of this by acollierastro instead.
Just a dumb idea, but... couldn't have molopoles simply collapsed... into gravity? At least to me, gravity itself seems to act like a monopole as described in the lecture.... But I assume that is not a point that was intended to be given.
Interesting idea. I don’t know much but a proton and an electron attract each other but don’t simply collapse and instead form a hydrogen atom. They don’t collapse probably because the attraction has quantum properties. Maybe a north and south monopole would do the same. I guess that’s also why gravity is interesting and right now general relativity is incompatible with quantum mechanics.
Point here is that there is such a thing as electric charge, coming in two varieties (positive and negative) and we could call an electric charge an "electric monopole". Put these two charges at the opposite ends of a rigid rod and you have an ``electric dipole" with an ``electric dipole moment". Remove the rod and allow them to collapse into each other, you get a neutral atom like object with or without an electric dipole moment (e.g. the Hydrogen atom is made of a positive and negative charge which can be in the ground state with zero electric dipole moment or an excited state with non-zero electric dipole moment). With magnetism there is no such thing as a magnetic charge, although there is such a thing as a magnetic dipole (that would be any magnet). There is no fundamental natural or mathematical obstruction to having a magnetic monopole, except that we haven't seen any in Nature ! So magnetic monopoles (or magnetic charges) if they existed could bind together to form atoms or magnetic dipoles like their electric counterparts. As you note there is such a thing as "gravitational charge" or "gravitational monopole" -- we call it "mass". But mass comes with only one sign -- there is no such thing as "negative mass". So in gravity we don't get gravitational dipoles (very unlike electricity and magnetism)!
@@physicsatswansea5351 TY so much for the response. I wonder if "dark matter" might actually be "negative mass" ..? I know it's quite a confabulation, but it seems not impossible ...
@@physicsatswansea5351 You should really post a quick primer in a pined comment because I see TONS of confusion in these comments over Electric charges and Magnetic "charges" with everyone seeming to think an Electric monopole is a magnetic one. I feel this topic is way over those folk's head but they are here so perhaps it's a good idea to give them a bit of clarification so as they watch it and read the comments they can understand the weight of this topic a bit more.
@@kevincarothers7486 We have a problem with DM that there seems to be a bunch of Mass we don't see so I doubt Negative mass would help any. It MIGHT help answer Dark energy but honestly, I wouldn't get my hopes up there either. I personally feel it all just points towards our current models being WILDLY incorrect but since I have not completed any better alternative its best to accept our standard models for now.
did nobody ever thought that our earth is the monopole? check out fractal quantum theory FQT
Why is he saying " the theory of magnetic monopoles"? There is no such thing as a magnetic monopole so this certainly is not a theory, it would have to be a hypothesis. Does this discount the lecture?
Not exactly. In the mathematical theory that describes nature, called the standard model, that has been experimentally tested to a staggering degree of accuracy, the magnetic monopoles come along for free. Researchers have studied these monopole solutions to help understand the theory
Now, they have not been observed. So people want to understand why so that theory can be improved!
Rob starts 21:39
That's a fine lecture young man.
So as I explained to the math guy, you won't find a magnetic monopole for the verse. That's an impossibility. It's not magnetically charged. The EMFS we observe are manufactured they are not a eternal force. We know this because we are inside several EMF bubbles the original being from our blacksphere. Now when you look across the verse you will see lots of poles. Each galaxy should have its own. This is where physicist make the first mistake I believe. Thinking the matter verse is part of the infinite ♾️ space. This is a mistake and is another reason most theory fail. Separation of these 2 entities is an absolute must if you want to find the correct theory I believe. So magnetic monopoles everywhere except for the infinite ♾️ space. We're in space not of the space. Thanks for reading and I hope this helps. Peace ✌️ from Canada eh.
Those who lecture and speak publicly should be given training in how to speak without saying UH and UM repeatedly. No matter how competent the speaker, those things can destroy interest in the presentation. Sorry.
Uh
Even the most experienced speakers will do that from time to time.
Speak for yourself lmao weirdo
Imbecile.
That's, uhhh, a you problem.
Great lecture. A very nice overview of the roles entropy has played since its inception as a concept. I just have a technical issue to point-out with the recording. The video channel was fine, but the audio channel kept having intermittent "skipping" in order to stay in sync. I'm not sure what would be the cause of that.
wait.... the temperature of black hole is really cold while its entropy is really big? that sounds like the *opposite* of the early universe (extremely hot but low entropy)! there might be something going on here....
🌹 Promo>SM
I love u mister Einstein on soul loyal to u
Justify an understanding of Singularity-point positioning i-reflection and "There's no further problem". Disproof Methodology Philosophy.
I still don't get how H+ ion isn't a monopole. Guess "magnetic moment" is the next subject.
Excellent question
@@theawantikamishra No, it really isn't. That is an electric monopole. I dont understand how so many watching this video dont understand even the most basics of Electromagnetic fields. Its great to step beyond ones knowledge as that is how you learn more but I fear many are taking the path of just jumping off a cliff thinking they will learn how to control gravity on the way down. Start with basic EM equations and understand how Electric fields and magnetic fields are related. Then you will start to easily see the problem with why Monopoles cant exist. There MIGHT be 1 monopole in the entire Universe.
It's so ridiculous what the poor employed researchers have to tell us with such seriousness and enthusiasm that I can't help but laugh. Isn't it the case that we had a completely different idea of the world for a short time? And isn't it the case that in a short time we will have a completely different idea of physical reality? And yet the protagonists are always on stage with great persuasiveness and try in vain to sell us the latest current affairs as a provable truth. Tragic, tragic.
I'm surprised they haven't asked you what they should be talking about.
At least they have to be honorable enough to mention this matter.@@bryandraughn9830
The allure of a pipe where water only goes in, or only comes out. "Well, water goes into this pipe, and it also comes out. Why can't we have a pipe that only does one of these?"
I would have been happy to watch this if I could hear it Please publish louder videos
Not loud enough!
I hate that accent! I have a hearing problem and I can't hear a phookin word he is saying. I did't even make ot past 60 seconds.
Very nice lecture. Well done
*Magnetism is the brass ring and the bull's nose, the tail comes with the nose, it's already a monopole, it's flowing.*
if you have a sphere then pin to the surface magnets that the south pole faces in north faces out is that then one pole?
That’s good, but no. Where does the inward flux go? The lines come out somewhere
dig two hole in the earth one small one big what has more mass ? is there mass to a hole?
just because a black hole gets bigger does not mean its mass is getting bigger just means the hole is bigger so that's less, not more?
It amazes me that many teachers of magnetism do not understand magnetic filed lines. A) the paper with filings on it obviously is a cross section of a magnets field , so the true shape is a toroid. ( lines would actually therefore be shells not lines ) B ) the iron filings collect immediately into looping lines because each particle becomes a small magnet itself , all the particles orient and form the lines, The field its self does not have "lines" these are an interaction between the field and the filings. So there are no actual lines around a free standing bar magnet and there is no flow in that field , which the term "Flux" might suggest. The "Lines of Flux" and "field density" is contextual to calculation purposes so we can quantify magnets and put them to use in engineering and science .
which has also cause problems
what happens when one twists a long bar magnet into an odd PI Mobius?
Spinning disk magnets produce massive imbalance of charge. Your fascination with electrons is based on the theory the core of the earth is made from magnetite. New evidence shows it's oxygen & aluminium, which produce larger particles.