George Shiber
/ | Philosophy | Mathematics | String/M-theory | All our scientific and philosophic ideals are altars to unknown gods ― William James
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Inflation after Planck: Judgment Day
arXiv.org 275d 2 tweets
Inflation is considered as the best theory of the early universe by a very large fraction of cosmologists. However, the validity of a scientific model is not decided by counting the number of its supporters and, therefore, this dominance cannot be...
George Shiber Inflation after Planck: Judgment Day "Inflation appears to be in a better shape after [the Planck data] than before, even if, of course, the questions raised by the inflationary theory have not all found fully satisfactory answers." 4h
Top cosmologist's lonely battle against 'Big Bang' theory
Phys.org 18h 1 tweets
James Peebles won this year's Nobel prize in physics for helping transform the field of cosmology into a respected science, but if there's one term he hates to hear, it's "Big Bang Theory."
Cease using the phrase “Standard Model” for a theory we know to be incorrect.
Life and Physics 27h 1 tweets
Things James Wells writes are usually worth reading, and this is no exception. Highly recommended to anyone (like me) who is thinking a lot about the current state, and future, of particle physics.…
George Shiber —Cease using the phrase “Standard Model” for a theory we know to be incorrect —Rotating strings in 6D higher-derivative SUGRA —Effective field theories as a novel probe of fine-tuning of cosmic inflation 27h
Rotating strings in six-dimensional higher-derivative supergravity
Physical Review D 27h 1 tweets
We construct the first analytical rotating string solution in six-dimensional Einstein-Gauss-Bonnet supergravity, carrying both electric and magnetic charges. By embedding the known rotating string solution of the two-derivative theory into...
George Shiber —Cease using the phrase “Standard Model” for a theory we know to be incorrect —Rotating strings in 6D higher-derivative SUGRA —Effective field theories as a novel probe of fine-tuning of cosmic inflation 27h
Effective field theories as a novel probe of fine-tuning of cosmic inflation - Philsci-Archive
Philsci-archive.pitt.edu 27h 1 tweets
George Shiber —Cease using the phrase “Standard Model” for a theory we know to be incorrect —Rotating strings in 6D higher-derivative SUGRA —Effective field theories as a novel probe of fine-tuning of cosmic inflation 27h
Resisting Scientific Realism // Notre Dame Philosophical Reviews // University of Notre Dame
ND's Web Team - Notre Dame Philosophical Reviews 53h 1 tweets
Notre Dame Philosophical Reviews is an electronic, peer-reviewed journal that publishes timely reviews of scholarly philosophy books.
George Shiber Philosophy book-review: — Resisting Scientific Realism Philosophy of science read: — The “Unreasonable Effectiveness of Mathematics” in Biology and the Fallacy from Complexity 53h
The "unreasonable effectiveness of mathematics" in biology and the fallacy from complexity - Philsci-Archive
Philsci-archive.pitt.edu 53h 1 tweets
George Shiber Philosophy book-review: — Resisting Scientific Realism Philosophy of science read: — The “Unreasonable Effectiveness of Mathematics” in Biology and the Fallacy from Complexity 53h
asymptotic safety in nLab
Ncatlab.org 4d 1 tweets
A Critique of the Asymptotic Safety Program
arXiv.org 4d 1 tweets
The present practice of Asymptotic Safety in gravity is in conflict with explicit calculations in low energy quantum gravity. This raises the question of whether the present practice meets the Weinberg condition for Asymptotic Safety. I argue, with...
Observability, Unobservability and the Copenhagen Interpretation in Dirac's Methodology of Physics - Philsci-Archive
Philsci-archive.pitt.edu 4d 1 tweets
George Shiber Sunday reads: — Observability, Unobservability and the Copenhagen Interpretation in Dirac's Methodology of Physics — Deweyan Experimentalism and the Problem of Method in Political Philosophy 4d
Deweyan Experimentalism and the Problem of Method in Political Philosophy // Notre Dame Philosophical Reviews // University of Notre Dame
ND's Web Team - Notre Dame Philosophical Reviews 4d 1 tweets
Notre Dame Philosophical Reviews is an electronic, peer-reviewed journal that publishes timely reviews of scholarly philosophy books.
George Shiber Sunday reads: — Observability, Unobservability and the Copenhagen Interpretation in Dirac's Methodology of Physics — Deweyan Experimentalism and the Problem of Method in Political Philosophy 4d
Made Visible
Harvard Magazine 4d 1 tweets
The ubiquity of movement across man-made borders
How Scientists Got Climate Change So Wrong
Nytimes.com 6d 49 tweets
Few thought it would arrive so quickly. Now we’re facing consequences once viewed as fringe scenarios.
O$(d,d)$ covariant String Cosmology to all orders in $α^{\prime}$
arXiv.org 6d 1 tweets
Recently, all duality invariant $α'$-corrections to the massless NS-NS sector of string theory on time-dependent backgrounds were classified and the form of their contribution to the action were calculated. In this paper we introduce matter sources...
George Shiber — O(d,d) Covariant String Cosmology to all Orders in α′ — Inflation and Leptogenesis in High-Scale Supersymmetry — Spacetime Fluctuations in AdS/CFT 6d
Inflation and Leptogenesis in High-Scale Supersymmetry
arXiv.org 6d 1 tweets
No-scale supergravity provides a successful framework for Starobinsky-like inflation models. Two classes of models can be distinguished depending on the identification of the inflaton with the volume modulus, $T$ (C-models), or a matter-like field,...
George Shiber — O(d,d) Covariant String Cosmology to all Orders in α′ — Inflation and Leptogenesis in High-Scale Supersymmetry — Spacetime Fluctuations in AdS/CFT 6d
Spacetime Fluctuations in AdS/CFT
arXiv.org 6d 1 tweets
We compute fluctuations in the modular energy of the vacuum associated with a Rindler-wedge in AdS spacetime in the context of AdS/CFT. We discuss the possible effect of these energy fluctuations on the spacetime geometry, and on the traversal time...
George Shiber — O(d,d) Covariant String Cosmology to all Orders in α′ — Inflation and Leptogenesis in High-Scale Supersymmetry — Spacetime Fluctuations in AdS/CFT 6d
The Naturalistic Case for Free Will, Part 2: An Indispensability Argument
Philosophy, Logic and Scientific Method 9d 4 tweets
What are the requirements of free will, and how can we show that these requirements are met? In the second post in this series, Christian List proposes an indispensability argument for the existenc…
George Shiber Is there space for free will within a scientific worldview? What are the requirements of free will, and how can we show that these requirements are met? The Naturalistic Case for Free Will: — Part 1: The Challenge — Part 2: An Indispensability Argument 6d
Majorana dimers and holographic quantum error-correcting codes
Physical Review Research 8d 1 tweets
This paper shows how a class of Hyperbolic tensor network models is described by Majorana dimers, nonlocal fermionic modes whose entanglement structure directly determines physical correlations of the underlying interacting system. These are also...
Research Guides: Women Inventors and Discoverers: Introduction
Guides.loc.gov 7d 1 tweets
This guide provides links to resources on women who played leading roles in creating new inventions and making discoveries.
Emergence of exploitation as symmetry breaking in iterated prisoner's dilemma
Physical Review Research 9d 1 tweets
Exploitation is frequently seen in society; the exploiting side gains a larger benefit with the sacrifice of exploited one. Can such an asymmetric relationship emerge, even though both the players symmetrically pursue their own benefit in a...
George Shiber Emergence of exploitation as symmetry breaking in iterated prisoner's dilemma 9d