HISTORY OF PHYSICS Norman F. Ramsey was an American physicist who received the 1989 Nobel Prize in Physics “for the invention of the separated oscillatory fields method and its use in the hydrogen maser and other atomic clocks.” He was part of the Manhattan project, too. 1/

HISTORY OF PHYSICS Kurt Symanzik was an influential German physicist. Starting in 1962, he developed Euclidean quantum field theory, surely one of his greatest achievements. He recognized that field theory could be reduced to the structure of classical statistical mechanics 1/

HISTORY OF PHYSICS Kurt Symanzik was an influential German physicist. Starting in 1962, he developed Euclidean quantum field theory, surely one of his greatest achievements. He recognized that field theory could be reduced to the structure of classical statistical mechanics 1/

History of Mathematics (and Physics) Born #OTD Benjamin Olinde Rodrigues (1795–1851) was a brilliant Jewish mathematician and successful banker whose life was deeply intertwined with the radical social and political shifts of post-Revolutionary France. 1/

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I have the impression that very few people is interested in the history of physics here in bluesky. I wonder why.

HISTORY OF PHYSICS Unifying Hadrons with SU(3) Symmetry: On the discovery of the SU(3) Gell-Mann–Okubo mass formula Early in the 20th century, the recognized elementary particles were the electron, proton, and neutron, along with the neutrino. After the discovery of mesons 1/

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HISTORY OF PHYSICS (As told by Yang Chen-Ning) Enrico Fermi had a very interesting way of working on a manuscript. When corrections were to be made, he would cut out portions to be deleted and scotch-tape on additions. As a result, some pages became long rolls of paper. 1/

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HISTORY OF PHYSICS In April 1961 there was a big Centennial Celebration at MIT. Naturally it was a proud, joyous, even intoxicating Celebration. At the week-long event there was a panel discussion on “The Future of Physics”, chaired by Francis Low, with four speakers in the following order: 1/

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A wee thread on a paper I think has big holes and some suggestions for grad students out there looking for a fun calculation... (Technical) 🔭 🧪 #cosmology It's this one; it claims at least 1% of the photons in the CMB are actually generated in early-forming galaxies. 1/N arxiv.org/abs/2505.04687

HISTORY OF PHYSICS On theorists and experimentalists. Lev Landau. Speech delivered on Arpil 8, 1960. Physicists are additionally divided according to a specific principle, which is not encountered in any other science, namely: a physicist is either an experimenter or a theorist... 1/

HISTORY OF PHYSICS When Paul Dirac was awarded the Nobel in 1933, he wanted to refuse it, as he hated advertising. However, Rutherford managed to persuade him to accept the award – he simply explained that a refusal would be an even bigger advertisement. He then agreed to go to Stockholm. 😂

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HISTORY OF PHYSICS In the fall 1954, Igor Dzyaloshinskii became a graduate student at the Institute for Physical Problems (IPP). This allowed him to pass security. At the time Igor arrived at the Institute of Physical Problems, there was still some work in the nuclear project (H-bomb). 1/

Happy 103rd birthday to Gerald Holton! Among his many claims to fame, he is the prime mover behind our #histsci program here at AIP. To celebrate his birthday, I dug into the battle between AIP & Holton vs. the Smithsonian that set it all in motion. www.aip.org/history/gera...

QUOTE OF THE DAY Life is short. Don't try to take a job you will be unable to accomplish. Never try to make only great discoveries; otherwise, you may be victimized by your ambitions. -- Lev Landau (His advice to his pupils, as told by Roald Sagdeev)

QUOTE OF THE DAY The integral without the dx is like a man without his trousers. -- Lev Landau

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Professors at universities say they have been using A.I. tools to make them better at their jobs. But students are calling it hypocritical, and one senior at Northeastern University demanded her tuition back.

HISTORY OF PHYSICS In early 1951, Edward Teller and Stanislaw Ulam developed the Teller-Ulam configuration, a design for a practical hydrogen bomb. This design utilized radiation from a fission primary to compress and ignite a thermonuclear secondary. 1/ (Source: Wikimedia)

HISTORY OF PHYSICS On fear, by Paul Dirac. I would like to refer particularly to Lorentz. Any of you who have studied relativity must surely have wondered why it was that Lorentz succeeded in getting correctly all the basic equations needed to establish 1/

This is a sea ​​lion. It lived its whole life in the Patagonian sea. But once, he thought why not to know other places? And it has been found walking around 50 km from the coast, in Torres del Paine, Chile.

QUOTE OF THE DAY The importance of good education. "When I was in the School in New York I had a lot of test and grading, and I got a lot of encouragement on that process" -- Frank Wilczek

HISTORY OF PHYSICS Einstein Ring. Orest Khvolson was a Russian/Soviet physicist who wrote a “Course of Physics”, translated into German, French and Spanish. Writing a six-volume course of physics (1st edition, 1895), was the main work of his life. 1/

QUOTE OF THE DAY The probability of the random emergence of life is incredibly small. Assembling a DNA molecule by chance from atoms is like discovering the novel War and Peace by randomly pulling letters out of a bag. -- Arkady B. Migdal Soviet physicist

QUOTE OF THE DAY There are two schools of teaching swimming. Personally, I am a supporter of the school that simply throws a person who can't swim into deep water. Whoever makes it to the surface will learn! -- Alexei Abrikosov Nobel Prize n Physics, 2003.

About my biography of Lev Landau. A former Landau's student, Prof. Valery L. Prokosvky, has reviewed my book: "In total, I should say that the author made a great work." I'm proud of myself and very happy.

I would vote for Juan Maldacena as new Pope. And you?

Hans Bethe at the Nobel ceremony, Dec. 10th 1967. AI "enhanced." Colorized.

HISTORY OF PHYSICS Lev Landau and Boris N. Yeselson, probably during a pause at the 1st All-Union Conference on Low Temperature Physics held in 1954, in Kharkov. I don't like pictures taken when one is eating.😂 Source: Lev Pitaevskii, 2010.

HISTORY OF PHYSICS On how Emmy Noether came to physics (while remaining a pure mathematician) The variational problem posed by Emmy Noether in her seminal 1918 paper leads to three theorems. Everything began with Felix Klein’s observation (in his response to 1916 Hilbert’s first note 1/

HISTORY OF PHYSICS On fairplay and chivalry. As told by Viki Weisskopf.

Pavel Cherenkov with his hair style at an angle given by cos(θ)=1/(n β)

QUOTE OF THE DAY I’m not smarter, I just think more. -- Vladimir N. Gribov

QUOTE OF THE DAY Good ideas are so scarce they come back again and again in different disguise. -- Alexander Migdal.

𝗪𝗲 𝘀𝗲𝗲 𝗖𝗣 𝘃𝗶𝗼𝗹𝗮𝘁𝗶𝗼𝗻 𝗶𝗻 𝗯𝗮𝗿𝘆𝗼𝗻𝘀! Today the LHCb collaboration posted a #preprint on the first observation of CP violation in baryons. What's the matter? Spoiler alert: contains bananas 🍌 #thread below

Children wrote Landau a letter: "since not all understand [the] need [for] an education. Many study their lessons... only to get a pass mark. We would like a letter from you, since your words will be very convincing..." His answer:

He is not Brian may, unless he uses his 1980s M60 Red Special ...

QUOTE OF THE DAY As told by Joel L. Lebowitz.

HISTORY OF PHYSICS Kenneth G. Wilson. A revolutionary. (June 8,1936 - June 15, 2013) Wilson was a markedly independent and original thinker as well as being a rather private and reserved person. An important part of his youthful look was that when somebody said something that 1/

HISTORY OF PHYSICS Nikita Khrushchev giving a speech in Kremlin. Behind Khrushchev, wearing a plaid shirt, completely casual, is Lev Landau. According to one of his students, he was trying to hide from the camera because he had an idea 1/

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Computer simulations (left) show that galaxies live within a vast network of hidden strands that crisscross the universe -- the "cosmic web." Now we can see the cosmic web for real! This filament (right) links two galaxies in the early universe. 🧪🔭 www.mpa-garching.mpg.de/1109034/news...