Eli LF
@elilevensonfalk.bsky.social
Associate Prof. of Physics & Astro at USC, running Levenson-Falk Lab and studying all things quantum with superconducting circuits. Personal account: physics, sports, politics, and terrible puns.
Checking in from a hotel in the middle of terrible light pollution
November 12, 2025 at 4:20 AM
Checking in from a hotel in the middle of terrible light pollution
What movie do you consider perfect?
October 31, 2025 at 5:49 AM
What movie do you consider perfect?
Ok new favorite sign
October 18, 2025 at 9:13 PM
Ok new favorite sign
Relocated downtown, this one is mine
October 18, 2025 at 8:51 PM
Relocated downtown, this one is mine
At least as few hundred people here in Woodland Hills! Something like 2/3 of the cars are honking support
October 18, 2025 at 6:06 PM
At least as few hundred people here in Woodland Hills! Something like 2/3 of the cars are honking support
The physics is flawless but I worry our youth aren't learning how to format memes
October 17, 2025 at 11:35 PM
The physics is flawless but I worry our youth aren't learning how to format memes
Seriously, they're traumatized
October 17, 2025 at 11:31 PM
Seriously, they're traumatized
I may have gotten a little animated about it in class
October 17, 2025 at 11:31 PM
I may have gotten a little animated about it in class
So glad I can always just use parity states in my work
October 17, 2025 at 11:31 PM
So glad I can always just use parity states in my work
One day I will invent one. One day
October 17, 2025 at 11:31 PM
One day I will invent one. One day
*chuckles* Nice try, but I see you've fallen into my trap of picking a preferred frame of reference
October 17, 2025 at 11:31 PM
*chuckles* Nice try, but I see you've fallen into my trap of picking a preferred frame of reference
I'm sorry to break their innocence but it's necessary
October 17, 2025 at 11:31 PM
I'm sorry to break their innocence but it's necessary
The key to physics is to be lazy
October 17, 2025 at 11:31 PM
The key to physics is to be lazy
Find the one you want. Nope, not that one, jail
October 17, 2025 at 11:31 PM
Find the one you want. Nope, not that one, jail
All I'm saying is ladder operators never made me scream "Why would you write it that way?!?!"
October 17, 2025 at 11:31 PM
All I'm saying is ladder operators never made me scream "Why would you write it that way?!?!"
Yes, yes they are
![Perturbation theory guy seeing butterfly ("[H0,A]=[H',A]=0 unique eigenvalues for each state of H0 with degenerate energeis") asking "are these good states?"](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:63t7sa3o2lm2hrfixsp2xwuw/bafkreigdqramx5q6dlioxtagsp3tloilu2syjyjnphdyl7my2mtxpodsea@jpeg)
October 17, 2025 at 11:20 PM
Yes, yes they are
z is a choice. The universe doesn't care about your choices. You should have made better choices.
October 17, 2025 at 11:20 PM
z is a choice. The universe doesn't care about your choices. You should have made better choices.
I can't decide whether it's cool these are roughly the same size or just annoying
October 17, 2025 at 11:20 PM
I can't decide whether it's cool these are roughly the same size or just annoying
Yeah it can be tricky
October 17, 2025 at 11:20 PM
Yeah it can be tricky
It's a few matrix elements. You'd think I asked them to derive the standard model from scratch!
(OK it's a lot of matrix elements)
(OK it's a lot of matrix elements)
October 17, 2025 at 11:20 PM
It's a few matrix elements. You'd think I asked them to derive the standard model from scratch!
(OK it's a lot of matrix elements)
(OK it's a lot of matrix elements)
Nice symmetry you got there. Would be a shame if something were to happen to it.
October 17, 2025 at 11:20 PM
Nice symmetry you got there. Would be a shame if something were to happen to it.
Gonna assume this is a show that I'm too old to know about
October 17, 2025 at 11:20 PM
Gonna assume this is a show that I'm too old to know about
Pi is parity here. Gotta conserve that. Unless you're Chien-Shiung Wu. She has special permission to break parity whenever she wants.
![Bouncer ("[V,Pi]=0") not letting in l'=l +/- 1, but letting in l'=l.](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:63t7sa3o2lm2hrfixsp2xwuw/bafkreif5zctvm2gcjgvl6czy3warwacd5cvx3xa52tyoz2fbmu7uqu4y5y@jpeg)
October 17, 2025 at 11:20 PM
Pi is parity here. Gotta conserve that. Unless you're Chien-Shiung Wu. She has special permission to break parity whenever she wants.