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We strengthen the case that the new logical perspective afforded by topos theory is suitable to the task of describing the physical world around us. In exploring some of the aspects of construction of a simple quantum-mechanical system in a…

量子物理 · 物理学 2007-05-23 John D. Fearns

For more than a half century cosmologists have been guided by the assumption that matter is distributed homogeneously on sufficiently large scales. On the other hand, observations have consistently yielded evidence for inhomogeneity in the…

综合物理 · 物理学 2008-05-20 R. L. Oldershaw

The successful anthropic prediction of the cosmological constant depends crucially on the assumption of a flat prior distribution. However, previous calculations in simplified landscape models showed that the prior distribution is…

高能物理 - 理论 · 物理学 2019-10-30 Ken D. Olum , Delia Schwartz-Perlov

The distribution of visible matter in the universe, such as galaxies and galaxy clusters, has its origin in the week fluctuations of density that existed at the epoch of recombination. The hierarchical distribution of the universe, with its…

宇宙学与河外天体物理 · 物理学 2015-01-21 Bruce N. Miller , Jean-Louis Rouet , Yui Shiozawa

When we want to predict the future, we compute it from what we know about the present. Specifically, we take a mathematical representation of observed reality, plug it into some dynamical equations, and then map the time-evolved result back…

量子物理 · 物理学 2015-01-29 Ken Wharton

The initial conditions of our universe appear to us in the form of a classical probability distribution that we probe with cosmological observations. In the current leading paradigm, this probability distribution arises from a quantum…

高能物理 - 理论 · 物理学 2021-08-11 Harry Goodhew , Sadra Jazayeri , Mang Hei Gordon Lee , Enrico Pajer

The probability distribution of lens image separations is calculated for the ``standard'' gravitational lensing statistics model in an arbitrary, flat Robertson-Walker universe, where lensing galaxies are singular isothermal spheres that…

天体物理学 · 物理学 2008-11-26 Myeong-Gu Park

A general piecewise (including pointwise) probability distribution with space-saving notation and its hierarchical particular cases are considered. The explicit closed-form normalization, expectation, and variance formulas along with the…

概率论 · 数学 2022-02-01 Lev Gelimson

We develop a stochastic formulation of cosmology in the early universe, after considering the scatter in the redshift-apparent magnitude diagram in the early epochs as an observational evidence for the non-deterministic evolution of early…

天体物理学 · 物理学 2015-06-24 C. Sivakumar , Moncy V. John , K. Babu Joseph

In principle the geometry of the universe can be investigated by measuring the angular size of known objects as a function of distance. Thus the distribution of angular sizes provides a critical test of the stable and static model of the…

天体物理学 · 物理学 2009-10-22 David F. Crawford

Quantum theory's irreducible empirical core is a probability calculus. While it presupposes the events to which (and on the basis of which) it serves to assign probabilities, and therefore cannot account for their occurrence, it has to be…

量子物理 · 物理学 2014-11-03 Ulrich Mohrhoff

It is often claimed that the fundamental laws of physics are deterministic and time-symmetric and that therefore our experience of the passage of time is an illusion. This paper will critically discuss these claims and show that they are…

量子物理 · 物理学 2023-04-20 Barbara Drossel

Understanding the origins and distribution of matter in the Universe is one of the most important quests in physics and astronomy. Themes range from astro-particle physics to chemical evolution in the Galaxy to cosmic nucleosynthesis and…

How is the universe organized on large scales? How did this structure evolve from the unknown initial conditions to the present time? The answers to these questions will shed light on the cosmology we live in, the amount, composition and…

天体物理学 · 物理学 2009-09-25 Neta A. Bahcall

Accurate modeling of opinion dynamics has the potential to help us understand polarization and what makes effective political discourse possible or impossible. Here, we use physics-based methods to model the evolution of political opinions…

物理与社会 · 物理学 2020-10-07 David Sabin-Miller , Daniel M. Abrams

Bigraphs are a universal computational modelling formalism for the spatial and temporal evolution of a system in which entities can be added and removed. We extend bigraphs to probablistic bigraphs, and then again to action bigraphs, which…

计算机科学中的逻辑 · 计算机科学 2022-06-28 Blair Archibald , Muffy Calder , Michele Sevegnani

In this paper, a modified formulation of generalized probabilistic theories that will always give rise to the structure of Hilbert space of quantum mechanics, in any finite outcome space, is presented and the guidelines to how to extend…

综合物理 · 物理学 2022-09-19 Raed M. Shaiia

Studies of disordered heterogeneous media and galaxy cosmology share a common goal: analyzing the distribution of particles at `microscales' to predict physical properties at `macroscales', whether for a liquid, composite material, or…

宇宙学与河外天体物理 · 物理学 2023-01-11 Oliver H. E. Philcox , Salvatore Torquato

Our standard model of the Universe predicts the distribution of dark matter to $1\%$ at the scales needed for upcoming experiments, yet our predictions for how the luminous matter -- which has interactions besides gravity -- is distributed…

高能物理 - 理论 · 物理学 2025-03-03 Nora Elisa Chisari

Large probabilistic models are often shaped by a pool of known individuals (a universe) and relations between them. Lifted inference algorithms handle sets of known individuals for tractable inference. Universes may not always be known,…

人工智能 · 计算机科学 2020-01-08 Tanya Braun , Ralf Möller