Daniel Carney

theoretical physics. measurement at the limits of quantum mechanics and gravity (and sometimes both).

[Daniel Carney @four_form]

@karch_andreas Rogan should invite you to the show now, it would be nice to see the contrast in public

[Daniel Carney @four_form]

As an American who has been in this specific competition for my entire life, the main result has been that my work is better precisely because I had to compete against the rest of the world for my jobs

Artificially restricting open competition is un-American to the core

[Lauren Chen @TheLaurenChen]

My hot take is that it's OK for Americans to not want to compete against the entire world for a job in their hometown.

[Daniel Litt @littmath]

@Noahpinion I think your commentary on this stuff would be improved by learning something about what professional mathematicians do.

[Daniel Carney @four_form]

https://t.co/XFas8mq6gD

[Daniel Carney @four_form]

"Why doesn't a charge sitting still on the surface of Earth radiate" has many good answers but this paper is my new favorite.

If the earth was big enough that the radiation zone of the charge was within the "approximately flat" local region, the earth would be a black hole 😎

[Daniel Carney @four_form]

@martinmbauer All true, but many of those effects can also be explained by classical or semiclassical radiation. To really nail it down, add sub-Poisson photocounting, Bell violations with light, entanglement in light-matter experiments…

[Daniel Carney @four_form]

Here is a thought experiment on the "physics is broken/dead/stuck" discourse that keeps showing up. Suppose Steve Weinberg was born in ~2006. Would he go into physics today? If so, what field?

[Daniel Carney @four_form]

Wonderful talk on 229-Th by Harry Morgan @KITP_UCSB

[Daniel Carney @four_form]

Filed under "I should have paid more attention to chemistry in high school"

[Daniel Carney @four_form]

@eviciium Totally reasonable question! Some answers:
1. Flex
2. It's a way to measure gas pressures at levels that are currently so low that existing sensors just measure 0 (https://t.co/3j5y2Yco27)
3. Characterizing backgrounds for fundamental physics measurements we want to do

[Daniel Carney @four_form]

2024: proposal to make a gas pressure measurement by literally counting every collision with a sensor

2026: measurement.

Could not be happier to see this work exactly like we drew it up

https://t.co/Ri3ze9TRdL

[Daniel Carney @four_form]

@Jess_Riedel Yeah, I think that's right. Cooling these spheres to the ground state (or even putting them in squeezed vacuum states) is possible, but it's not needed for these impulse measurements, fortunately... https://t.co/PCWlycNoGv

[Jonathan Oppenheim @postquantum]

We invite applications for Research Fellow positions as part of a new initiative to be launched in late 2026 at the interface of quantum information theory and gravity! Please RT and let potentially interested researchers know. 1/

[Jess Riedel @Jess_Riedel]

Dude, are there non-trivial non-pathological Lorentz-covariant Lindbladians in QFT or not? Are the current no-go arguments like Myrvold [1709.03219] as strong as we can hope for? Is the situation better understood in classical field theory?

[Daniel Carney @four_form]

this morning i have received emails about:
-nuclear winter
-claude can hack anything
-fluffy animals wearing berkeley physics shirts

this era is so fucking weird

[Daniel Carney @four_form]

@Muppetsexual @avfeyn137 @jonathon_gault Sound in solids can be quantized into phonons. Sound in dilute gases cannot. It depends on the condensed state you are expanding around

[Daniel Carney @four_form]

Gravity is probably quantized into gravitons.

If not, however, there are experimental consequences. In particular, some level of irreversibility/noise. We finally classified ~all such models and calculated the noise.

https://t.co/qN1qQ0AELS

[Daniel Carney @four_form]

@Cosmalano @Samuel_Gregson You can definitely treat theoretically as gravitons. The question is whether that accurately describes nature

[Daniel Carney @four_form]

@jonathon_gault Gravitons are space time curvature. Just like photons are electromagnetic field

[Daniel Carney @four_form]

@cosmicfibretion https://t.co/6bGEhZ8F4a

[Sinéad Griffin @sineatrix]

#letsfuckinggo https://t.co/q2Jp2GJFNO @TheSuperconduct @HesamiSalami @hautiergroup 👀