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Robert Cordery

@robphysics.bsky.social

I am a practicing Catholic theoretical physicist retired from 30 years in Industrial R&D. I am now an Adjunct Physics Prof. at Fairfield University. My interests are statistical physics, renormalization group, and grandchildren.

47 Followers  |  172 Following  |  14 Posts  |  Joined: 04.12.2023  |  1.9522

Latest posts by robphysics.bsky.social on Bluesky

βš›οΈ πŸ§ͺI probably posted this in the wrong place. I’m still learning.

28.03.2025 12:33 β€” πŸ‘ 3    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0

I’m just showing how unicodeit.net works here for LaTeX to unicode. It won’t do arbitrary LaTeX, but can make math look nicer:

iβ„βˆ‚Ξ¨βˆ‚t=βˆ’(ℏ²/(2m))βˆ‚Β²Ξ¨/βˆ‚ xΒ²+ VΞ¨

28.03.2025 11:57 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 1

I said physics and math can explain how the universe works but not why it is here. He answered β€œOh, get your own dirt!”
In that old tale a biologist told God that she could create life. She picked up some dirt and God said β€œGet your own dirt!”

23.03.2025 19:11 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

βš›οΈThanks for this. I never saw how you can try to understand the universe and not feel awe.
I was at a mathematical security conference and having dinner with a Hasidic Jewish mathematician. He asked sarcastically how I could be a physicist and religious.

23.03.2025 19:06 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Time to forget theory and cut a small practice piece (or more than one). 😳

23.03.2025 18:52 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

As a retired physicist thinking about the strange spaces implied by quantum + gravity, I would really appreciate a good thesaurus between the physics and mathematics terminology.

16.03.2025 20:17 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
World’s Largest Camera Lens
YouTube video by Physics Girl World’s Largest Camera Lens

Diana Cowern (Physics Girl) has a nice video showing and explaining the lens. youtu.be/33UMkPe93Ko?...

12.03.2025 21:44 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
World’s Largest Camera Lens
YouTube video by Physics Girl World’s Largest Camera Lens

Diana Cowern (Physics Girl) has a video showing and explaining the objective lens. youtu.be/33UMkPe93Ko?...

12.03.2025 21:41 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

βš›οΈ One of my favorite moments was after a talk by Richard Feynman at Northeastern U about a toy model for confinement and strong coupling. I told him that his model was equivalent to the high T Ising expansion on a lattice wth coordination number 3. He looked surprised and agreed!😁

28.02.2025 16:48 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Equilibrium Polymerization as an Ising Model A lattice model for equilibrium polymerization which allows for loop polymers is presented with critical behavior described by $n=1$, rather than $n\ensuremath{\rightarrow}0$ predicted by the theory o...

This equilibrium polymerization model, with a choice for the energy of crossing loops, is the high temperature expansion of the Ising model. The experimental specific heat of liquid sulfur fits the Ising critical exponents and ratios of the amplitude above and below Tc. doi.org/10.1103/Phys...

28.02.2025 16:43 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

A simple lattice stat. mech. model that exhibits an equilibrium polymerization transition has unbroken loops of sulfur chains placed on the nearest neighbor edges of a lattice. Edges have either 0 or 1 chains. There is an energy cost of putting a chain on an edge and for chains crossing.

28.02.2025 16:37 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

βš›οΈ Liquid sulfur has an equilibrium polymerization phase transition around Tc = 160 C. Well below Tc it is a yellow liquid of mostly cyclooctasulfane (Sβ‚ˆ) rings.
Longer rings form, becoming very long near Tc. The liquid is viscous and turns brown. The specific heat has a sharp lambda transition.

28.02.2025 16:19 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Sushi burrito sounds like another Toronto entangled quantum state. When I was at UofT we liked a similar mixture: Ginsberg & Wong restaurant - Jewish deli and Chinese.

22.12.2024 01:19 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Profiles

Please add me: Adjunct in Fairfield University physics department scholar.google.com/citations?vi...

11.10.2024 04:36 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

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