Swagat Saurav Mishra
@primeval-arhsim.bsky.social
Particle Cosmologist @uniofnottingham.bsky.social | Interested in Big❓'s | PhD from @IUCAA || Research & Education || Physics|Mathematics|Music|Cricket|Hiking|Cafe|Fashion|🌌⚫⏳🏞️ ☮️🇮🇳🇬🇧
Reposted by Swagat Saurav Mishra
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
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
December 24, 2024 at 6:19 AM
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
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
Reposted by Swagat Saurav Mishra
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.
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.
December 21, 2024 at 8:10 AM
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.
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.
We are announcing the *Early Universe from Home 2025* conference, whose registration is now open. Please share with colleagues and collaborators
Registration for *Early Universe from Home 2025* is now open! (running 25-28 Feb)
It will be the best place to learn about and discuss...
- correlators
- phase transitions
- topological defects
- primordial black holes
- and other early structures.
earlyuniverse.cosmodiscussion.com
It will be the best place to learn about and discuss...
- correlators
- phase transitions
- topological defects
- primordial black holes
- and other early structures.
earlyuniverse.cosmodiscussion.com
Early Universe from Home
earlyuniverse.cosmodiscussion.com
December 19, 2024 at 4:12 PM
We are announcing the *Early Universe from Home 2025* conference, whose registration is now open. Please share with colleagues and collaborators
Reposted by Swagat Saurav Mishra
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.
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.
December 14, 2024 at 10:02 AM
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.
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.
December 14, 2024 at 9:47 AM
Reposted by Swagat Saurav Mishra
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
December 13, 2024 at 4:33 AM
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
Reposted by Swagat Saurav Mishra
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
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
December 12, 2024 at 8:24 AM
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
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
Another favorite paper of mine. I have read and reread this paper multiple times
Dec 11 - The Phase Transition to Eternal Inflation
arxiv.org/abs/0802.1067
Creminelli et al define the transition to slow-roll eternal inflation by the diverging volume of the reheating surface. They offer a precise prediction for the amplitude of the power spectrum where this occurs.
arxiv.org/abs/0802.1067
Creminelli et al define the transition to slow-roll eternal inflation by the diverging volume of the reheating surface. They offer a precise prediction for the amplitude of the power spectrum where this occurs.
December 11, 2024 at 8:48 AM
Another favorite paper of mine. I have read and reread this paper multiple times
Reposted by Swagat Saurav Mishra
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.
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.
December 10, 2024 at 8:15 AM
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.
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.
Reposted by Swagat Saurav Mishra
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).
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).
December 9, 2024 at 8:27 AM
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).
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).
Reposted by Swagat Saurav Mishra
This has always been one of my favorite papers.
Let me also advertise our work with @wkcosmo.bsky.social where we prove why the other alternatives come at a cost
arxiv.org/abs/1107.1241
arxiv.org/abs/1107.1241
General conditions for scale-invariant perturbations in an expanding universe
We investigate the general properties of expanding cosmological models which generate scale-invariant curvature perturbations in the presence of a variable speed of sound. We show that in an expanding...
arxiv.org
December 6, 2024 at 1:45 PM
This has always been one of my favorite papers.
Reposted by Swagat Saurav Mishra
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!
- 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!
December 6, 2024 at 1:36 AM
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!
- 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!
Reposted by Swagat Saurav Mishra
Big Numbers on Numberphile - YouTube
Really Big Numbers!
www.youtube.com
December 8, 2024 at 7:48 AM
Reposted by Swagat Saurav Mishra
(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.
My name is Olly Long and I am a researcher working on modelling the binary black hole problem in General Relativity.
December 8, 2024 at 10:32 AM
(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.
My name is Olly Long and I am a researcher working on modelling the binary black hole problem in General Relativity.
Reposted by Swagat Saurav Mishra
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.
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.
December 8, 2024 at 9:46 AM
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.
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.
Reposted by Swagat Saurav Mishra
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
Dec 6 - Coherent Phase Argument for Inflation
arxiv.org/abs/hep-ph/0...
The horizon problem in the era of precision CMB is better understood in terms of the fact that all sound waves have the same phase. Dodelson provides a simple and powerful explanation of this modern argument.
arxiv.org/abs/hep-ph/0...
The horizon problem in the era of precision CMB is better understood in terms of the fact that all sound waves have the same phase. Dodelson provides a simple and powerful explanation of this modern argument.
December 6, 2024 at 12:27 PM
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
Reposted by Swagat Saurav Mishra
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.
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.
December 7, 2024 at 8:31 AM
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.
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.
One of my favorite papers
Dec 6 - Coherent Phase Argument for Inflation
arxiv.org/abs/hep-ph/0...
The horizon problem in the era of precision CMB is better understood in terms of the fact that all sound waves have the same phase. Dodelson provides a simple and powerful explanation of this modern argument.
arxiv.org/abs/hep-ph/0...
The horizon problem in the era of precision CMB is better understood in terms of the fact that all sound waves have the same phase. Dodelson provides a simple and powerful explanation of this modern argument.
December 6, 2024 at 9:45 AM
One of my favorite papers
Reposted by Swagat Saurav Mishra
Three PhD positions in theoretical physics 🧪⚛️ are open at the TPPC in King's College London with three excellent supervisors!
December 4, 2024 at 8:57 AM
Three PhD positions in theoretical physics 🧪⚛️ are open at the TPPC in King's College London with three excellent supervisors!
Reposted by Swagat Saurav Mishra
Come and do a PhD www.kcl.ac.uk/research/the...
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.
www.kcl.ac.uk
December 4, 2024 at 8:14 AM
Come and do a PhD www.kcl.ac.uk/research/the...
Reposted by Swagat Saurav Mishra
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.
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.
December 4, 2024 at 8:18 AM
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.
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.
Reposted by Swagat Saurav Mishra
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...
www.kcl.ac.uk/research/the...
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.
www.kcl.ac.uk
December 4, 2024 at 9:16 AM
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...
www.kcl.ac.uk/research/the...
Reposted by Swagat Saurav Mishra
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.
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.
December 3, 2024 at 8:09 AM
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.
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.
Reposted by Swagat Saurav Mishra
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
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
December 2, 2024 at 8:48 AM
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
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
Look out for 31 posts in Physics this month by Prof. Dan Green
This December, I will be trying another experiment:
Each day I will post 1 under-appreciated paper/result (my definition/no rules).
I will also be posting my choices on Twitter (@nu_phases). I am curious to see which site has more interesting feedback/discussion
Each day I will post 1 under-appreciated paper/result (my definition/no rules).
I will also be posting my choices on Twitter (@nu_phases). I am curious to see which site has more interesting feedback/discussion
December 1, 2024 at 8:54 AM
Look out for 31 posts in Physics this month by Prof. Dan Green