scholarly journals Testing CPT violation, entanglement and gravitational interactions in particle mixing with trapped ions

2021 ◽  
Vol 81 (5) ◽  
Author(s):  
Antonio Capolupo ◽  
Salvatore Marco Giampaolo ◽  
Aniello Quaranta
Keyword(s):  
Ion Trap ◽  
Magnetic Field Gradient ◽  
Particle Systems ◽  
Trapped Ions ◽  
The Self ◽  
Cpt Violation ◽  
Particle Mixing ◽  
Effective System ◽  
Self Gravity ◽  
The Universe

AbstractBy analyzing the analogies between the effective system of N spins described by the Ising Hamiltonian and the phenomenon of the self-gravity in mixed particle systems, we show that cooled ions held in a segmented ion trap and exposed to a magnetic field gradient can simulate the proposed mechanism of mutual interaction in mixed neutrino system. We show that with trapped ions one can reproduce the expected corrections to the flavor transitions and the CPT violation induced by gravity on flavor fields, which may have played an important role in the early stages of the universe. The results presented are experimentally testable.

‘A pinch of unseen, unguarded dust’: The World and Self in Thomas Hardy's Poems

2018 ◽  
Vol 8 (1) ◽  
pp. 49-66
Author(s):  
Monika Szuba
Keyword(s):  
The Body ◽  
The Self ◽  
Phenomenological Philosophy ◽  
The Earth ◽  
The World ◽  
The Universe ◽  
Recurrent Theme ◽  
Body Subject

The essay discusses selected poems from Thomas Hardy's vast body of poetry, focusing on representations of the self and the world. Employing Maurice Merleau-Ponty's concepts such as the body-subject, wild being, flesh, and reversibility, the essay offers an analysis of Hardy's poems in the light of phenomenological philosophy. It argues that far from demonstrating ‘cosmic indifference’, Hardy's poetry offers a sympathetic vision of interrelations governing the universe. The attunement with voices of the Earth foregrounded in the poems enables the self's entanglement in the flesh of the world, a chiasmatic intertwining of beings inserted between the leaves of the world. The relation of the self with the world is established through the act of perception, mainly visual and aural, when the body becomes intertwined with the world, thus resulting in a powerful welding. Such moments of vision are brief and elusive, which enhances a sense of transitoriness, and, yet, they are also timeless as the self becomes immersed in the experience. As time is a recurrent theme in Hardy's poetry, this essay discusses it in the context of dwelling, the provisionality of which is demonstrated in the prevalent sense of temporality, marked by seasons and birdsong, which underline the rhythms of the world.

The flattening phase transition in systems of trapped ions

2009 ◽  
Vol 87 (10) ◽  
pp. 1425-1435 ◽  
Author(s):  
Taunia L. L. Closson ◽  
Marc R. Roussel
Keyword(s):  
Phase Transition ◽  
Critical Exponent ◽  
Order Parameter ◽  
Ion Trap ◽  
Anisotropy Parameter ◽  
Critical Value ◽  
Trapped Ions ◽  
Dimensional Structure ◽  
Flattening Process ◽  
Second Order Phase Transition

When the anisotropy of a harmonic ion trap is increased, the ions eventually collapse into a two-dimensional structure consisting of concentric shells of ions. This collapse generally behaves like a second-order phase transition. A graph of the critical value of the anisotropy parameter vs. the number of ions displays substructure closely related to the inner-shell configurations of the clusters. The critical exponent for the order parameter of this phase transition (maximum extent in the z direction) was found computationally to have the value β = 1/2. A second critical exponent related to displacements perpendicular to the z axis was found to have the value δ = 1. Using these estimates of the critical exponents, we derive an equation that relates the amplitudes of the displacements of the ions parallel to the x–y plane to the amplitudes along the z axis during the flattening process.

scholarly journals Orbital evolution of Saturn’s satellites due to the interaction between the moons and the massive rings

2020 ◽  
Vol 640 ◽  
pp. L15
Author(s):  
Ayano Nakajima ◽  
Shigeru Ida ◽  
Yota Ishigaki
Keyword(s):  
Orbital Evolution ◽  
The Self ◽  
Mean Motion Resonances ◽  
First Order ◽  
Mean Motion ◽  
Saturn’S Satellites ◽  
Orbital Configuration ◽  
Self Gravity ◽  
Spiral Arm ◽  
Orbital Migration

Context. Saturn’s mid-sized moons (satellites) have a puzzling orbital configuration with trapping in mean-motion resonances with every-other pairs (Mimas-Tethys 4:2 and Enceladus-Dione 2:1). To reproduce their current orbital configuration on the basis of a recent model of satellite formation from a hypothetical ancient massive ring, adjacent pairs must pass first-order mean-motion resonances without being trapped. Aims. The trapping could be avoided by fast orbital migration and/or excitation of the satellite’s eccentricity caused by gravitational interactions between the satellites and the rings (the disk), which are still unknown. In our research we investigate the satellite orbital evolution due to interactions with the disk through full N-body simulations. Methods. We performed global high-resolution N-body simulations of a self-gravitating particle disk interacting with a single satellite. We used N ∼ 105 particles for the disk. Gravitational forces of all the particles and their inelastic collisions are taken into account. Results. Dense short-wavelength wake structure is created by the disk self-gravity and a few global spiral arms are induced by the satellite. The self-gravity wakes regulate the orbital evolution of the satellite, which has been considered as a disk spreading mechanism, but not as a driver for the orbital evolution. Conclusions. The self-gravity wake torque to the satellite is so effective that the satellite migration is much faster than was predicted with the spiral arm torque. It provides a possible model to avoid the resonance capture of adjacent satellite pairs and establish the current orbital configuration of Saturn’s mid-sized satellites.

The Identity Paradigm

2011 ◽  
Author(s):  
Peter Brooks
Keyword(s):  
Social Contexts ◽  
The Self ◽  
Critical Importance ◽  
High Culture ◽  
Psychoanalytic Discourse ◽  
Point Of Intersection ◽  
The Universe

This epilogue reflects on the critical importance of the identity paradigm—and especially the identificatory paradigm—in culture. To see the identificatory paradigm at work, in a range of cultural and social contexts—in legal settings and debates, in fictions from low and high culture, in confessional and psychoanalytic discourse—is to bring to attention something characteristic and important about people's lives, singly and collectively. To grasp the predominance and the importance of the identity paradigm is to recognize something ineradicable and significant in culture. The chapter then presents something of a contradiction: the self sees itself from the inside as a place of depth, meaning, and as the center of the universe, whereas the self viewed from the outside is merely the point of intersection of impoverished data.

Self, Indian theories of

2018 ◽  
Author(s):  
T.S. Rukmani
Keyword(s):  
The Body ◽  
The Self ◽  
The Other ◽  
Self Identity ◽  
Inner Self ◽  
Spiritual Energy ◽  
The Individual ◽  
The Universe ◽  
Ultimate Principle ◽  
Ultimate Nature

Hindu thought traces its different conceptions of the self to the earliest extant Vedic sources composed in the Sanskrit language. The words commonly used in Hindu thought and religion for the self are jīva (life), ātman (breath), jīvātman (life-breath), puruṣa (the essence that lies in the body), and kṣetrajña (one who knows the body). Each of these words was the culmination of a process of inquiry with the purpose of discovering the ultimate nature of the self. By the end of the ancient period, the personal self was regarded as something eternal which becomes connected to a body in order to exhaust the good and bad karma it has accumulated in its many lives. This self was supposed to be able to regain its purity by following different spiritual paths by means of which it can escape from the circle of births and deaths forever. There is one more important development in the ancient and classical period. The conception of Brahman as both immanent and transcendent led to Brahman being identified with the personal self. The habit of thought that tried to relate every aspect of the individual with its counterpart in the universe (Ṛg Veda X. 16) had already prepared the background for this identification process. When the ultimate principle in the subjective and objective spheres had arrived at their respective ends in the discovery of the ātman and Brahman, it was easy to equate the two as being the same spiritual ‘energy’ that informs both the outer world and the inner self. This equation had important implications for later philosophical growth. The above conceptions of the self-identity question find expression in the six systems of Hindu thought. These are known as āstikadarśanas or ways of seeing the self without rejecting the authority of the Vedas. Often, one system or the other may not explicitly state their allegiance to the Vedas, but unlike Buddhism or Jainism, they did not openly repudiate Vedic authority. Thus they were āstikadarśanas as opposed to the others who were nāstikadarśanas. The word darśana for philosophy is also significant if one realizes that philosophy does not end with only an intellectual knowing of one’s self-identity but also culminates in realizing it and truly becoming it.

The Effect of the Self‐Gravity of Gas on Gas Fueling in a Barred Galaxy with a Supermassive Black Hole

2000 ◽  
Vol 529 (1) ◽  
pp. 109-118 ◽  
Author(s):  
Hiroyuki Fukuda ◽  
Asao Habe ◽  
Keiichi Wada
Keyword(s):  
Black Hole ◽  
The Self ◽  
Supermassive Black Hole ◽  
Self Gravity

scholarly journals 11.15. The effect of a central massive black hole on the gas fueling

1998 ◽  
Vol 184 ◽  
pp. 485-486
Author(s):  
H. Fukuda ◽  
A. Habe ◽  
K. Wada
Keyword(s):  
Black Hole ◽  
Numerical Simulations ◽  
Gravitational Potential ◽  
Galactic Center ◽  
The Self ◽  
Massive Black Hole ◽  
Nuclear Regions ◽  
Self Gravity ◽  
Lindblad Resonance ◽  
Inner Lindblad Resonance

Nuclear activities in galaxies, such as nuclear starbursts or AGNs, are supposed to be induced by gas fueling into nuclear regions of galaxies. Non-axisymmetric gravitational potential caused by a stellar bar is a convincing mechanism for triggering gas fueling (Phinney 1994). However, numerical simulations have shown that the bar can not force the gas to accrete toward the galactic center beyond the inner Lindblad resonance (ILR). As a mechanism to overcome the ILR barrier, the double barred structure (Friedli & Martinet 1993), or the self-gravity of gas (Wada & Habe 1992, 1995; Elmegreen 1994) are proposed.

Whitehead's Theory of Human Agency

Dialogue ◽  
1964 ◽  
Vol 2 (4) ◽  
pp. 424-441
Author(s):  
Douglas Browning
Keyword(s):  
Microscopic Theory ◽  
Human Agency ◽  
The Self ◽  
Human Being ◽  
Macroscopic Theory ◽  
Actual Entity ◽  
Adequate Theory ◽  
The Universe

An adequate theory of the self must provide for the fact of human agency. I would like to show that (1) we can put together a theory of human agency from Whitehead's later writings, but that (2) this theory is not satisfactory. This discussion will be, first, expository and then critical of Whitehead's position. An elaboration of Whitehead's theory has two moments. For Whitehead, all factors of the universe are finally derivative from the ultimately actual things, which he calls actual entities. The fact of agency is no exception. The establishment of such agency is the job of what I shall call Whitehead's microscopic theory. We are interested here, however, in the human being as agent. A person, according to Whitehead, is not an actual entity, but a society of actual entities. Whitehead's theory of human agency may be called the macroscopic theory. After an examination of these theories, I shall conclude by briefly criticizing them in two ways. First, for Whitehead there are no acts but only processes. Second, an adequate theory requires a doctrine of the persistence of the agent which Whitehead is unable to provide.

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