iiinova — where your digital self keeps evolving

Swagat Saurav Mishra @primeval-arhsim.bsky.social · 23/06/2026

A Cosmology🧵: "Can the Inflation Field survive to act as the Dark Matter in the Universe?" In our new work on arXiv, we explore this possibility in Warm Inflation framework. 'Dark Matter as an Inflationary Relic in Warm Inflation' arxiv.org/abs/2606.22147 Happy to discuss; comments are welcome :-)

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Swagat Saurav Mishra @primeval-arhsim.bsky.social · 12/06/2026

Hope you enjoy watching this latest release from 'Cosmology Talks' where Shaun & I discuss: What cosmological inference of evolving (including Phantom) Dark Energy Does & Does Not Imply - in the context of DESI BAO results and beyond. Based on my recent work on the arXiv.

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Clare Burrage @clareburrage.bsky.social · 14/05/2026

Alongside the majority of my colleagues in the School of Physics and Astronomy at Nottingham, I have received a letter telling me I am at risk of redundancy. To my physics friends - please sign this letter to help us save our amazing School nottinghamphysics.github.io/Open_Letter/

nottinghamphysics.github.io

Save Nottingham Physics and Astronomy

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Tony Padilla #JFT97 Don’t buy the S*n @proftonypadilla.bsky.social · 14/05/2026

Dear academic colleagues. Please sign and share this open letter expressing your support for Physics & Astronomy at Nottingham, as the university plans unnecessary and devastating cuts. One in three academics staff expected to lose their jobs nottinghamphysics.github.io/Open_Letter/...

nottinghamphysics.github.io

Save Nottingham Physics and Astronomy

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Daniel Green @dangreen.bsky.social · 24/12/2024

Dec 24 - Cosmic Bell Inequalities arxiv.org/abs/1508.01082 Maldacena writes down a model of inflation where the statistics of certain hot and cold spots encode the outcome of a Bell-measurement. This shows that the quantum nature of inflation can survive in conventional classical observables

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Daniel Green @dangreen.bsky.social · 21/12/2024

Dec 21 - Conformal Technicolor arxiv.org/abs/hep-ph/0... Luty & Okui rephrase the hierarchy problem as a statement about the relationship between the dimensions of operators. The idea is that the Higgs has a dimension near 1 but all the operators in its OPE have dimensions > 4.

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Swagat Saurav Mishra @primeval-arhsim.bsky.social · 19/12/2024

We are announcing the *Early Universe from Home 2025* conference, whose registration is now open. Please share with colleagues and collaborators

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Daniel Green @dangreen.bsky.social · 14/12/2024

Dec 14 - cosmological perturbation theory in 1+1 D arxiv.org/abs/1502.07389 McQuinn and White study the evolution of structure in 1+1 dimensions, where the all-loop results can be calculated. They show SPT has a finite radius of convergence but doesn't converge to simulations.

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Swagat Saurav Mishra @primeval-arhsim.bsky.social · 14/12/2024

Loved this pedagogical paper by John Donoghue arxiv.org/abs/2412.087...

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Ciaran O'Hare @cajohare.bsky.social · 13/12/2024

I feel like I need to break the ice here somehow... I suppose I will just announce that I will be posting my annual AxionLimits yearly round-up on this account soon, so stay tuned i guess

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Daniel Green @dangreen.bsky.social · 12/12/2024

Dec 12 - A de Sitter S-matrix arxiv.org/abs/1209.6039 Marolf et al. define an S-matrix for massive particles in (fixed) global dS. They prove that many facts about flat space S-matrix also apply to dS. They develop a lot of interesting ideas that should have a wide range of applications

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Swagat Saurav Mishra @primeval-arhsim.bsky.social · 11/12/2024

Another favorite paper of mine. I have read and reread this paper multiple times

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Daniel Green @dangreen.bsky.social · 10/12/2024

Dec 10 - Detectors and Rindler Particles journals.aps.org/prd/abstract... Unruh and Wald give a fantastically clear explanation of why accelerating observers see a thermal spectrum of particles: the particles are created from the energy you put into the detector to accelerate it.

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Daniel Green @dangreen.bsky.social · 09/12/2024

Dec 9 - Axion-electron coupling limit from 47 Tucanae arxiv.org/abs/1507.05665 Studying white dwarf cooling in this globular cluster, Hansen et al. bound the axion coupling g_ae < 8.4E-14. This excludes the hint of axion cooling seen in previous studies (eg arxiv.org/abs/0806.2807).

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Will Kinney @wkcosmo.bsky.social · 06/12/2024

This has always been one of my favorite papers.

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Prof. Linda @cosmolinda.bsky.social · 06/12/2024

It’s #introduction time! - I create universes using supercomputers as a job - I’m eternally fascinated by all the mysteries of the cosmos - currently trying to unveil some of the properties of dark energy - passionate advocate for equity in science Looking forward to interact with ya’ll!

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Brady Haran @bradyharan.bsky.social · 08/12/2024

Videos about whopping big numbers www.youtube.com/playlist?lis...

youtube.com

Big Numbers on Numberphile - YouTube

Really Big Numbers!

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Olly Long @hyperbolly.bsky.social · 08/12/2024

(1/7) As I’m new here I thought I should introduce myself! My name is Olly Long and I am a researcher working on modelling the binary black hole problem in General Relativity.

Artist’s impression of the horizons and curvature of a binary black hole system. Generated using Paraview.

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Daniel Green @dangreen.bsky.social · 08/12/2024

Dec 8 - EFT / model building and the anomalous perihelion of mercury arxiv.org/abs/1106.1568 Wells explores how a model building / EFT approach to explaining Mercury's orbit would have worked. He introduces 3 ideas that all can work, and are realized in GR in different gauges.

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Eugene Lim @tukohbin.bsky.social · 06/12/2024

This is absolutely my favourite paper! I love it and I also had a little history in it because Scott talked to me about an idea of mine which evaded this strong constraint! Why is it such a beautiful paper ? Let’s discuss it! 1/n

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Daniel Green @dangreen.bsky.social · 07/12/2024

Dec 7 - The Age of the Universe arxiv.org/abs/astro-ph... Combining data from CBI, DASI, BOOMERANG ++, Seivers et al. measure the age to be 13.7 +/- 0.2 billion years in near perfect agreement the modern value. This is when cosmology becomes a precision subject, giving tight errors on LCDM.

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Lucien Heurtier @lucienheurtier.bsky.social · 04/12/2024

Three PhD positions in theoretical physics 🧪⚛️ are open at the TPPC in King's College London with three excellent supervisors!

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Daniel Green @dangreen.bsky.social · 04/12/2024

Dec 4 - An EFT for Holographic RG (Kaplan & Wang) arxiv.org/pdf/1406.4152 This paper writes the non-relativistic EFT in AdS that is dual to a large class of relativistic RG flows on the boundary. The construction of the bulk theory is the AdS analogue of the EFT of Inflation.

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Eugene Lim @tukohbin.bsky.social · 04/12/2024

I am looking for a PhD student for the OCT 2025 intake to work on dynamical compactification of extra dimensions or on boson stars GW signatures! www.kcl.ac.uk/research/the...

kcl.ac.uk

Theoretical Particle Physics & Cosmology

The research focus of the TPPC Group is on tests of new models of particle physics beyond the Standard Model, including supersymmetry, large extra dimensions and strings.

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Daniel Green @dangreen.bsky.social · 03/12/2024

Dec 3 - Dark Energy Survey CMB-free H0 measurement arxiv.org/abs/1711.00403 Combining BBN+BAO+weak lensing they measure H0 = 67.4 +/- 1.1 km/s/Mpc, in agreement with the CMB without using CMB data. This was the first measurement of its kind at essentially current day precision.

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Daniel Green @dangreen.bsky.social · 02/12/2024

Dec 2 - Scattering to many particles is (semi)-classical Eg inspirehep.net/literature/2... arxiv.org/abs/hep-ph/9... Two to N scattering is described by a semi-classical solution to the equations of motion (controlled by large N). This property of rare processes is far more general

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Swagat Saurav Mishra @primeval-arhsim.bsky.social · 01/12/2024

Look out for 31 posts in Physics this month by Prof. Dan Green

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Daniel Green @dangreen.bsky.social · 01/12/2024

Dec 1 - Peebles on dark matter and the CMB ui.adsabs.harvard.edu/abs/1982ApJ.... Peebles explains how the lack of observations of CMB temperature fluctuations at dT/T > 10^(-3) requires dark matter. It was a decade before anyone measured a non-zero value but this connection is profound

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Swagat Saurav Mishra @primeval-arhsim.bsky.social · 28/11/2024

Sharing another intriguing physics paper : I have long been fascinated by Paul Ehrenfest's 1917 article showing planetary systems are virtually unstable for any dimensions of spacetime, other than d = 3+1 [Proc. Amsterdam Academy. 20 200]

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Swagat Saurav Mishra @primeval-arhsim.bsky.social · 26/11/2024

Giving a seminar at Helsinki Institute of Physics tomorrow (online). Slides can be found here : swagatam18.wordpress.com/wp-content/u...

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Swagat Saurav Mishra @primeval-arhsim.bsky.social · 24/11/2024

Since I am new here, I thought I would continue my tradition of sharing pedagogical review articles about important topics in theoretical physics & Cosmology. I begin with this excellent review of Cosmological Constant by Jerome Martin, I have personally found illuminating. arxiv.org/abs/1205.3365

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Martin Bauer @martinmbauer.bsky.social · 23/11/2024

Technical 🧵on ghosts (states with negative norm) States with a negative norm are unphysical in quantum field theories. If you have a kinetic term with a negative sign it gives rise to the following commutation relation 1/9

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Swagat Saurav Mishra @primeval-arhsim.bsky.social · 22/11/2024

At Lancaster University this week to give a Cosmology Seminar on 'Reheating after inflation and formation of Oscillons'.

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Swagat Saurav Mishra @primeval-arhsim.bsky.social · 21/11/2024

I am new here. Looking forward to reconnecting with my old Twitter (X) colleagues to continue discussions on Physics, Mathematics and the Universe.

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