Bruno Giménez Umbert
@gimenezumbert.bsky.social
Theoretical physicist and postdoc at the University of Southampton. PhD at Perimeter. I love physics
Reposted by Bruno Giménez Umbert
Are bacterial spores some kind of travelling neurons? In this @science.org paper the authors show that B. subtilis spores can integrate environmental signals over time and remember transient nutrient pulses. @koseskalab.bsky.social @drmichaellevin.bsky.social www.kaitokikuchi.com/assets/pdf/K...
December 27, 2025 at 1:29 PM
Are bacterial spores some kind of travelling neurons? In this @science.org paper the authors show that B. subtilis spores can integrate environmental signals over time and remember transient nutrient pulses. @koseskalab.bsky.social @drmichaellevin.bsky.social www.kaitokikuchi.com/assets/pdf/K...
Reposted by Bruno Giménez Umbert
Our history has taught us that there is no freedom of speech without freedom of information. And freedom of information exists where there is respect for pluralism.
There will be no freedom of speech if citizens' freedom of information is sacrificed to defend some tech oligarchs.
There will be no freedom of speech if citizens' freedom of information is sacrificed to defend some tech oligarchs.
December 8, 2025 at 12:52 PM
Our history has taught us that there is no freedom of speech without freedom of information. And freedom of information exists where there is respect for pluralism.
There will be no freedom of speech if citizens' freedom of information is sacrificed to defend some tech oligarchs.
There will be no freedom of speech if citizens' freedom of information is sacrificed to defend some tech oligarchs.
Reposted by Bruno Giménez Umbert
Immaturity masquerading as strength is the defining personal characteristic of our age.
A Palantir billionaire just called for public hangings.
“It's time to bring back masculine leadership to protect our most vulnerable,” writes Joe Lonsdale.
This is where Silicon Valley authoritarianism is heading:
www.thenerdreich.com/joe-lonsdale...
“It's time to bring back masculine leadership to protect our most vulnerable,” writes Joe Lonsdale.
This is where Silicon Valley authoritarianism is heading:
www.thenerdreich.com/joe-lonsdale...
Joe Lonsdale Calls For Public Hangings
Silicon Valley radicalization escalates
www.thenerdreich.com
December 7, 2025 at 4:59 PM
Immaturity masquerading as strength is the defining personal characteristic of our age.
Reposted by Bruno Giménez Umbert
You could also work with Debbie Leung, Richard Cleve, David Gosset, Luke Schaefer, Ashwin Nayak, Norbert Lutkenhaus, Mike Mosca, Christine Muschik or some combination of us if you do theory.
If you are interested in doing a postdoc with me, please apply to the IQC postdoctoral fellowship here: iqc-uwaterloo.slideroom.com#/login/progr...
University of Waterloo
Attn: Institute for Quantum Computing - SlideRoom
Apply to University of Waterloo
Attn: Institute for Quantum Computing. Powered by SlideRoom.
iqc-uwaterloo.slideroom.com
November 7, 2025 at 2:32 AM
You could also work with Debbie Leung, Richard Cleve, David Gosset, Luke Schaefer, Ashwin Nayak, Norbert Lutkenhaus, Mike Mosca, Christine Muschik or some combination of us if you do theory.
Reposted by Bruno Giménez Umbert
The hierarchy problem (finetuning) of the Standard Model of particle physics is often presented as the question 'why the weak scale is so much smaller than the Planck scale'
But there is also a geometric interpretation that can be understood with little maths (but a lot of physics)
🧵1/11
But there is also a geometric interpretation that can be understood with little maths (but a lot of physics)
🧵1/11
October 25, 2025 at 3:31 PM
The hierarchy problem (finetuning) of the Standard Model of particle physics is often presented as the question 'why the weak scale is so much smaller than the Planck scale'
But there is also a geometric interpretation that can be understood with little maths (but a lot of physics)
🧵1/11
But there is also a geometric interpretation that can be understood with little maths (but a lot of physics)
🧵1/11
Reposted by Bruno Giménez Umbert
This is the 800th LHCb paper. 🎉
First evidence of CP violation in beauty baryon to charmonium decays arxiv.org/abs/2509.16103 - The difference in the CP asymmetries between Λ⁰b→J/ψpπ⁻ and Λ⁰b→J/ψKπ⁻ decays is measured to be ΔACP=(4.0±1.2±0.2)%.
September 23, 2025 at 6:08 AM
This is the 800th LHCb paper. 🎉
Reposted by Bruno Giménez Umbert
Reposted by Bruno Giménez Umbert
Time is running out to apply for our workshop:
"50 years of the black hole information paradox: November 3 -7 , 2025"
at Simons Center for Geometry and Physics
scgp.stonybrook.edu/archives/45328
"50 years of the black hole information paradox: November 3 -7 , 2025"
at Simons Center for Geometry and Physics
scgp.stonybrook.edu/archives/45328
August 23, 2025 at 7:24 PM
Time is running out to apply for our workshop:
"50 years of the black hole information paradox: November 3 -7 , 2025"
at Simons Center for Geometry and Physics
scgp.stonybrook.edu/archives/45328
"50 years of the black hole information paradox: November 3 -7 , 2025"
at Simons Center for Geometry and Physics
scgp.stonybrook.edu/archives/45328
Reposted by Bruno Giménez Umbert
Congratulations to Luis Lehner on being named to the Simons Collaboration on Black Holes and Strong Gravity.
Lehner is one of 12 researchers working to build a theoretical framework for unlocking the secrets of gravitational wave data.
Details: perimeterinstitute.ca/news/perimet...
Lehner is one of 12 researchers working to build a theoretical framework for unlocking the secrets of gravitational wave data.
Details: perimeterinstitute.ca/news/perimet...
August 11, 2025 at 7:13 PM
Congratulations to Luis Lehner on being named to the Simons Collaboration on Black Holes and Strong Gravity.
Lehner is one of 12 researchers working to build a theoretical framework for unlocking the secrets of gravitational wave data.
Details: perimeterinstitute.ca/news/perimet...
Lehner is one of 12 researchers working to build a theoretical framework for unlocking the secrets of gravitational wave data.
Details: perimeterinstitute.ca/news/perimet...
Reposted by Bruno Giménez Umbert
Complexity Postdoctoral Fellowships at the Santa Fe Institute @sfiscience.bsky.social are now open for applications!
(I should also announce a postdoc opening with me at Johns Hopkins pretty soon.)
apply-sfi.smapply.org/prog/complex...
(I should also announce a postdoc opening with me at Johns Hopkins pretty soon.)
apply-sfi.smapply.org/prog/complex...
Complexity Postdoctoral Fellowship - Santa Fe Institute
apply-sfi.smapply.org
July 28, 2025 at 2:23 PM
Complexity Postdoctoral Fellowships at the Santa Fe Institute @sfiscience.bsky.social are now open for applications!
(I should also announce a postdoc opening with me at Johns Hopkins pretty soon.)
apply-sfi.smapply.org/prog/complex...
(I should also announce a postdoc opening with me at Johns Hopkins pretty soon.)
apply-sfi.smapply.org/prog/complex...
Unless deported upon arrival, I will be in Boston from June 1 to June 7. If anyone around the area wants to hang out, feel free to DM me!
May 25, 2025 at 4:41 PM
Unless deported upon arrival, I will be in Boston from June 1 to June 7. If anyone around the area wants to hang out, feel free to DM me!
Reposted by Bruno Giménez Umbert
PSA: when a collaboration whose name starts with DE says they have found evidence for non-standard dark energy, the community should take that interpretation with more skepticism.
DESI does not show that w0wa explains there data. Eg neutrino mass remains negative even with w0wa
DESI does not show that w0wa explains there data. Eg neutrino mass remains negative even with w0wa
March 22, 2025 at 6:35 PM
PSA: when a collaboration whose name starts with DE says they have found evidence for non-standard dark energy, the community should take that interpretation with more skepticism.
DESI does not show that w0wa explains there data. Eg neutrino mass remains negative even with w0wa
DESI does not show that w0wa explains there data. Eg neutrino mass remains negative even with w0wa
Reposted by Bruno Giménez Umbert
Zelensky is a hero by any sensible measure. A leader inspiring his nation in the midst of an invasion by a powerful, repressive dictatorship. The fact that any American can think of him as the bad guy just demonstrates the triumph of tribalism over principle.
Republicans are lining up to denounce Zelensky because their base was seduced by a cranky old racist with a fondness for dictators. Just wild how the whims, prejudices, and weird obsessions of a senile 78-year-old have completely supplanted the party’s priorities — and reshuffled the world order.
March 1, 2025 at 12:40 AM
Zelensky is a hero by any sensible measure. A leader inspiring his nation in the midst of an invasion by a powerful, repressive dictatorship. The fact that any American can think of him as the bad guy just demonstrates the triumph of tribalism over principle.