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Shifting the Dark Matter Paradigm at the Quantum Level
KEYNOTE Presentation
In the past decade, there have been significant shifts in the dark matter paradigm, following a series of astronomical observations, which combined with narrower detection limits challenged the widely embraced cold dark matter model. We briefly review these challenges and the status quo of dark matter research, focusing on fermionic dark matter particles with energies in the keV range that became a viable model for dark matter. Generically called warm dark matter, the hypothesized keV fermionic particles possess properties that are expected to manifest their influence at both large and small scales, i.e., freestreaming length, velocity dispersion and quantum pressure. Starting from the production mechanisms of such particles in models connected with higher-dimensional gauge theories and continuing with the large-scale structure formation signatures that are depicted in numerical simulations and, at smaller scales, the internal structure of galaxies, where quantum properties like the quantum pressure become crucial, we present the key advantages that the model presents when tested against astronomical observations. We discuss the fundamental theoretical predictions, the numerical tests and challenges, and the current developments in detection experiments. We clarify some of the misconceptions and confusing claims found in the literature.
Nonlocal Properties of Quasicrystals
Invited talk
Quasicrystals, the ‘peculiar’ materials with aperiodic order and no translational symmetry, exhibit long-range and nonlocal order. Indeed, in quasicrystals, any given local patch, called an emperor, forces at all distances the existence of accompanying tiles – the empire. Using the cut-and-project method generalized to calculate empires for quasicrystals that are projected from cubic lattices, several 2D and 3D quasicrystals projected from higher-dimensions have been studied. The empires allow us to recover information from the higher dimensional lattice from which the quasicrystal was projected, filtering out any defects and providing thus an important self-correction tool for quasicrystal growth. We discuss the dynamical modeling of the interactions between empires – where separate patches impose geometric restrictions on each other no matter how far apart they are situated within the tiling – in a game-of-life approach governed by nonlocal rules. These nonlocal properties and their dynamical evolution, while studied here from theoretical and numerical perspectives, have many applications in materials science research. Their study opens up a rich avenue of research that can bridge different fields, from physics in high dimensions, to phason dynamics, advanced material science, and possibly, quantum computing.
Check out our latest paper Warm Dark Matter in Simulations.
S. Paduroiu, Universe, 2022 8(2):76
An invited review published in the Special Issue
keV Warm Dark Matter (ΛWDM) in Agreement with Observations in Tribute to Héctor J. De Vega)
In recent years, warm dark matter models have been studied as a viable alternative to the cold dark matter models. The warm dark matter particle properties are expected to imprint distinct signatures on the structure formation at both large and small scales and there have been many attempts to study these properties with numerical simulations. In this paper, we review and update on warm dark matter simulation studies from the past two decades and their most significant results: structure formation mechanisms, halos evolution, sizes and distribution, and internal structure properties. We discuss the theoretical assumptions and the limitations of the methods employed. In this context, several controversial claims are scrutinized in the attempt to clarify these confusing and sometimes even contradictory conclusions in the numerical simulation literature. We address the circumstances in which a promising keV dark matter candidate should be properly treated in the simulations.
S.Paduroiu, M. Rios, A. Marrani, D. Chester, Universe 2021
Where no one has gone before – higher in high-dimensions, searching for dark matter, in branes collided.
Check out our recent paper Warm Dark Matter from Higher-Dimensional Gauge Theories.
An invited article published in the Special Issue
keV Warm Dark Matter (ΛWDM) in Agreement with Observations in Tribute to Héctor J. De Vega)
Warm dark matter particles with masses in the keV range have been linked with the large group representations in gauge theories through a high number of species at decoupling. In this paper we address WDM fermionic degrees of freedom from such representations. Bridging higher-dimensional particle physics theories with cosmology studies and astrophysical observations, our approach is two-folded: realistic models from higher-dimensional representations and constraints from simulations tested against observations. Starting with superalgebras in Exceptional Periodicity theories, we discuss several symmetry reductions and we consider several representations that accommodate a high number of degrees of freedom. We isolate a model that naturally accommodates both the standard model representation and the fermionic dark matter in agreement with both large and small-scale constraints. This model considers an intersection of branes in D=27+3 in a manner that provides the degrees of freedom for the standard model on one hand, and 2048 fermionic degrees of freedom for dark matter, corresponding to a ~ 2 keV particle mass, on the other. In this context we discuss the theoretical implications and the observable predictions.
Marking the 10th anniversary of “The Forbidden Universe” it was an honor to be joining our brilliant friends, authors Lynn Picknett and Clive Prince for a Q&A Podcast on the Mystical Origins and Leading Edge of Science at Cuyamungue Institute.
Check out the Q&A Podcast The first stirrings of the Scientific Revolution were inspired “by the same unashamedly metaphysical and magic-oriented philosophy” write historians Lynn Picknett and Clive Prince in The Forbidden Universe: The Occult Origins of Science and the Search for the Mind of God. In the search for “God’s handiwork,” who are the key players, the pivotal breakthroughs, and how, along the way, did we become “materialist-rationalists”? Where is the leading edge of science heading, and where must physics meet up again with metaphysics?
Today, while science excels at mapping out ordinary reality, we must ask how well it can map out non-ordinary reality. Dark energy, dark matter, dark to our eyes and technology, as it does not emit, absorb or reflect light, is non-ordinary, remains undetected, and yet, permeates everything.
Cosmologist Sinziana Paduroiu, updates us on the latest chapter on this and other curiosities of our observable Universe, noting that the 5% of the Universe that we have mapped is so complex, so multi-layered, we cannot expect the other 95% to be simple. Which leads us to ask, how does Newton’s Physics, Einstein’s Relativity, and Quantum Physics merge into one continuum? What do our trance experiences reveal about the Alternate Reality and other hidden dimensions of our mysterious, majestic Universe?
Q&A on Hypnosis at Cuyamungue Institute with hosts Paul Robear and Laura Lee.
We explore the shared space between hypnosis and trance states we experience with the Ecstatic Trance Postures. With hypnosis, we bypass the critical mind so that the suggestions delve into the subconscious where automatic behavioral patterns live. The trance is induced with a specific goal in mind, e.g. healing, discovery, stress relief or reprogramming some automatic behaviors and/or beliefs. Hypnotherapeutic techniques, and “shamanic journeying” trance techniques run parallel with a spectrum of healing that is entered through the altered state.
Shamans use trance to obtain information, which they then use to help and to heal community members. Nearly all societies are known to engage in practices that lead to altered states of consciousness. However, the methods, functions, and cultural context vary widely between societies. Since contemporary hypnosis may very well go back to prehistory and have its origin in shamanism, we will compare the induction steps shamanic rituals typically consist of with those employed in most forms of contemporary hypnotic modalities. Also, we will discuss the physiological/mental changes observed in both ecstatic trance and hypnosis, looking at the results from biofeedback, neurofeedback, and personal experience, attempting to integrate all this with the current proposed models for consciousness.
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