Karmela Padavic-Callaghan (they/them)
@kpcallaghan_
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Now: @newscientist. Past: @sciam @WIRED @QuantaMagazine @techreview @aeonmag @PhysicsWorld. Physics PhD. Ex @BHSEC teacher. Croatian in Queens. Vegan. Queer.
Joined July 2013
Could not be more excited to be working on my first book with @CatherineTung1 for @BeaconPressBks. It is such a privilege to get to bring something personal into writing about the science that has always been integral to who I am as a person
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Excited to share the news of our alum @JosiahSinclair building a lab and recruiting for a new team at Madison this Fall! Send him your lean & hungry students – they won't regret it! Congratulations, Josiah, and we're looking forward to hearing about your next successes!
I’m thrilled to share that this fall I’ll be joining the faculty at the University of Wisconsin–Madison as the Carl J. and Brynn B. Anderson Assistant Professor of Physics. The past year has been quite a journey: 32 applications, 12 on-site interviews, and 4 offers. I feel
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Nominate the most innovative work on Fundamental Issues in Quantum Mechanics and their Applications for the 2026 John Stewart Bell Prize! (Pls retweet!) See https://t.co/nZF7dzXsWl Deadline 30 August 2025. @CQIQC_Toronto #QuantumInformation #FoundationsOfQM #BellPrize
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This is almost certainly what will happen if Congress does not pass a fiscal year 2026 budget by October 1. Very bad for NASA's science programs. Dozens of missions turned off.
NASA's Nicky Fox , AA Science, affirms that agency is preparing to enact OMB's proposed fiscal '26 budget. Speaking at opening session of #SmallSat2025
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In a bleak twist of logic, ultrafinitists aim to obliterate infinity. Their radical plan? Remodel the universe of numbers. Is this the dawn of a grim #ScienceRevolution? Welcome to the dystopia of #Mathematics. #Ultrafinitism. Dive in, if you dare: https://t.co/t1ABuBIG4V...
newscientist.com
Science news and long reads from expert journalists, covering developments in science, technology, health and the environment on the website and the magazine.
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In our first review, scientists revisit how physical forces shape collective #AnimalBehavior, revealing how individual-environment coupling underlies group dynamics across taxa — from fish schools to ant rafts. 🐟 🐜 🔗 https://t.co/AJygIaRDN6
#CollectiveBehavior
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Cld our universe have emerged from a big bounce following contraction of a previous universe rather than a big bang? A new analysis by UC Berkeley physicist Raphael Bousso that's based on quantum theory “categorically rules out” a cyclic universe... (NS)
newscientist.com
Instead of the big bang, some physicists have suggested that our universe may have come from a big bounce following another universe contracting – but quantum theory could rule this out
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"For quantum computers to get significant speed-up, they need to take advantage of special structure. They do not offer significant speed-up for unstructured problems, so we do not expect to be able to just throw them at anything." @andrewmchilds
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Applications for the 2025-2026 cycle of the 51 Pegasi b Postdoctoral Fellowship in Planetary Astronomy are now open! Please don't hesitate to reach out if you are interested in applying with Yale as a host institution :)
hsfoundation.org
The 51 Pegasi b Fellowship provides exceptional postdoctoral scientists with the opportunity to conduct theoretical, observational, and experimental research in planetary astronomy.
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For interested students: Quantum Hackathon LATAM 2025 is happening this year (October 1-3) at the University of Montevideo, Uruguay.
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Picosecond synchronization of mode-locked lasers for metropolitan-scale quantum networks @NIST @JQInews @OpticaWorldwide @kpcallaghan_ @OPNmagazine
https://t.co/zPceGQZ7Bk
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Reflecting also on the sheer amount of people, effort, and money serious field work like this epic NSF-funded project requires. Reliable weather forecasts and weather data don't just fall from the sky!!
I rode along with the meteorologists chasing the world's most extreme hail storms across the Great Plains in a massive effort improve our forecasts of these damaging events. Thanks to all involved in @nsf_icechip for having us. Had a hail of a good time. https://t.co/Jb6rRbbdBw
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It’s honestly so disrespectful and irresponsible that the national media has mostly ignored the @afscme33 city workers’ strike in Philly, now in week two. It’s a huge story with massive implications for the 6th biggest city in the country. Hell, I’ll write about it! Email me!
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The hunt for the next Busy Beaver number is one of the most exciting things happening in maths today and the heroes behind it are a community of enthusiasts, fishing bits of exotic code from a deep mathematical abyss that seems to lead into the unknowable
newscientist.com
Some numbers are so unimaginably large that they defy the bounds of modern mathematics, and now mathematicians are closing in on a number that may mark the edge of this bizarre abyss
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I'm hiring a postdoc! If you'd like to work with me on quantum learning, error correction, quantum algorithms, and FTQC at Virginia Tech in the Washington, DC metro area, please apply here:
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Two 4-year fully funded PhD positions available in my group at University College Dublin. Application deadline Saturday May 31st. Come join us in exploring the wonderful world of quantum many-body physics! See https://t.co/mb14IXCbg7 for more details.
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Wonderfully written article by Dr. Karmela Padavic-Callaghan @newscientist! Summary and perspective into our recent work on the framework of Quantum Darwinism. Here are the links for our recent papers discussed in the news article: https://t.co/qK5cAkwtjd
https://t.co/dg5UdRglbf
arxiv.org
The transition from quantum to classical behavior is a central question in modern physics. How can we rationalize everyday classical observations from an inherently quantum world? For instance,...
A framework inspired by evolution may demonstrate why two different observers see the same non-quantum world emerge from the many fuzzy probabilities of the quantum realm.
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Thanks to @kpcallaghan_ with @newscientist for the clear writeup of my upcoming work with Jonah Kudler-Flam and @8piGSatish (paper to appear very soon)!
An eavesdropper hiding inside of a black hole could still obtain information about quantum objects on its outside, a finding that reveals how effectively black holes destroy the quantum states near their event horizons.
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We provide a classical simulation of DWave quantum "s-word" paper. Here it is https://t.co/IEivJNMnid , great work by Linda Mauron @cqs_lab, check it out! Our findings are in line with the other pre-print from @FlatironInst @MStoudenmire that just came out, but with a very
arxiv.org
Recent demonstrations of D-Wave's annealing-based quantum simulators have established new benchmarks for quantum computational advantage [arXiv:2403.00910]. However, the precise location of the...
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Physics folks - I'll be at the APS Global Summit in a few weeks, looking for stories for New Scientist. If you're presenting something amazing or just want to tell me about your research over lunch, I'll be available so please do reach out.
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