scholarly journals An experiment to test the discreteness of time

2020 ◽  
Author(s):  
Pierre Martin-Dussaud ◽  
Andrea Di Biagio ◽  
Marios Christodoulou
Keyword(s):  
Planck Scale ◽  
Technological Capabilities ◽  
Impossible Task ◽  
Planck Time

Abstract Time at the Planck scale (∼10−44s) is an unexplored physical regime. It is widely believed that probing Planck time will remain for long an impossible task. Yet, we propose an experiment to test the discreteness of time at the Planck scale and show that it is not far removed from current technological capabilities.

scholarly journals Nature does not play Dice at the Planck scale

2020 ◽  
Vol 29 (14) ◽  
pp. 2043012
Author(s):  
Tejinder P. Singh
Keyword(s):  
Degrees Of Freedom ◽  
Large Scale ◽  
Planck Scale ◽  
Coarse Graining ◽  
Lagrangian Dynamics ◽  
Time Intervals ◽  
Spacetime Geometry ◽  
The Status ◽  
Planck Time ◽  
Matter Fields

We start from classical general relativity coupled to matter fields. Each configuration variable and its conjugate momentum, as also spacetime points are raised to the status of matrices [equivalently operators]. These matrices obey a deterministic Lagrangian dynamics at the Planck scale. By coarse-graining this matrix dynamics over time intervals much larger than Planck time, one derives quantum theory as a low energy emergent approximation. If a sufficiently large number of degrees of freedom get entangled, spontaneous localisation takes place, leading to the emergence of classical spacetime geometry and a classical universe. In our theory, dark energy is shown to be a large-scale quantum gravitational phenomenon. Quantum indeterminism is not fundamental, but results from our not probing physics at the Planck scale.

scholarly journals Classicalization of Quantum Fluctuations at the Planck Scale in the Rh=ct Universe

2021 ◽  
Author(s):  
FULVIO MELIA
Keyword(s):  
Degrees Of Freedom ◽  
Field Potential ◽  
Planck Scale ◽  
Quantum Fluctuations ◽  
Harmonic Oscillators ◽  
New Developments ◽  
Active Mass ◽  
Primordial Power Spectrum ◽  
Classical Transition ◽  
Planck Time

Abstract The quantum to classical transition of fluctuations in the early universe is still not completely understood. Some headway has been made incorporating the effects of decoherence and the squeezing of states, though the methods and procedures continue to be challenged. But new developments in the analysis of the most recent Planck data suggest that the primordial power spectrum has a cutoff associated with the very first quantum fluctuation to have emerged into the semi-classical universe from the Planck domain at about the Planck time. In this paper, we examine the implications of this result on the question of classicalization, and demonstrate that the birth of quantum fluctuations at the Planck scale would have been a `process' supplanting the need for a `measurement' in quantum mechanics. Emerging with a single wavenumber, these fluctuations would have avoided the interference between different degrees of freedom in a superposed state. Moreover, the implied scalar field potential had an equation-of-state consistent with the zero active mass condition in general relativity, allowing the quantum fluctuations to emerge in their ground state with a time-independent frequency. They were therefore effectively quantum harmonic oscillators with classical correlations in phase space from the very beginning.

Screened Anxieties: Affect and Temporality in The Birth of a Nation

2019 ◽  
Vol 14 (2) ◽  
pp. 129-150
Author(s):  
Tim DeJong
Keyword(s):  
Racial Politics ◽  
The Past ◽  
The Future ◽  
Impossible Task

This essay examines attitudes toward the future in D. W. Griffith's film The Birth of a Nation, focusing in particular on the opposed emotions hope and fear. In doing so, it establishes critical connections between the film's aesthetic philosophy – which is marked by an attempt to control its characters, its audience, and even history itself – and the film's troubling and much-discussed racial politics. Griffith's stated beliefs in the ability of cinema to fully capture the past and in turn to dictate to its audience the terms of the future, manifest themselves everywhere in The Birth of a Nation not only thematically but formally. However, the film sets an impossible task for itself, and where it falls short, its own hopes and fears become dramatically visible. This failure indicates that The Birth of a Nation is ultimately imbricated in the modernist episteme of uncertainty it works to deny and disavow.

INCREASING THE WEAR RESISTANCE OF ELEMENTS AND COMPONENTS OF FORGING AND STAMPING EQUIPMENT (FOR EXAMPLE, PERFORMING SEPARATION OPERATIONS)

2020 ◽  
Author(s):  
K.O. Kobzev ◽  
◽  
S.A. Vyalov ◽  
E.S Bozhko ◽  
I.A. Zolotuhina ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Technological Capabilities ◽  
Recoil Force ◽  
The Press ◽  
Strength And Durability

The article describes the possibilities of increasing the durability of crank presses. The influence of the main parameters of the press on the value of the recoil force was studied. Based on the analysis of this topic, the types of expansion of technological capabilities of crank presses and their strength and durability were summarized.

HIGH-TECH/LOW-TECH INDUSTRIES AND THE STRUCTURE-PERFORMANCE RELATIONSHIP WITHIN MEXICAN MANUFACTURES

2017 ◽  
Vol 3 (5) ◽  
pp. 45
Author(s):  
Dmitri Fujii
Keyword(s):  
Discriminant Analysis ◽  
Market Structure ◽  
Recent Literature ◽  
High Tech ◽  
Technological Capabilities ◽  
Empirical Application ◽  
Empirical Results ◽  
Statistical Robustness ◽  
Analysis Technique

Recent literature on Mexican industry has emphasized its uneven sectorial development: some sectors have been successful, while the rest remain well behind. Given these circumstances, the present paper proposes a particular division for Mexican industry in High-Tech and Low-Tech sectors. This division is based on technological capabilities for a particular sample of industries during the nineties and verified for statistical robustness using the discriminant analysis technique. Finally, the division is used for an empirical application in terms of profitability and market structure. The empirical results reveal a diverse behaviour of the High-Tech and Low-Tech groups.

Thermodynamics of the singularity of a black hole and the mass of the rebound

2020 ◽  
Author(s):  
Vitaly Kuyukov
Keyword(s):  
General Relativity ◽  
Black Hole ◽  
Equilibrium Condition ◽  
Planck Scale

In this paper, we analyze the singularity of a black hole based on a modification of general relativity. There is an equilibrium condition on the Planck scale. This makes it possible to study the thermodynamics of the singularity of a black hole.

Technological capabilities of vibration fi nishing of parts by granular organic media from natural materials

2020 ◽  
pp. 407-410
Author(s):  
E.Yu. Krupenya ◽  
A.P. Shishkina
Keyword(s):  
Experimental Verification ◽  
Organic Media ◽  
Technological Capabilities ◽  
Natural Materials ◽  
Machine Parts ◽  
Parts Manufacturing

The essence and scope of granular organic media from natural materials in the technology for machine parts manufacturing are shown. Vibration finishing model of the parts surface by granules of stone organic media and the results of its experimental verification, features of drying and vibration wiping of parts by organic media are presented.

scholarly journals Renormalization group equations of Higgs-R2 inflation

2021 ◽  
Vol 2021 (2) ◽  
Author(s):  
Yohei Ema ◽  
Kyohei Mukaida ◽  
Jorinde van de Vis
Keyword(s):  
Renormalization Group ◽  
Standard Model ◽  
Planck Scale ◽  
Energy Scale ◽  
Einstein Frame ◽  
Ricci Scalar ◽  
Minimal Coupling ◽  
Renormalization Group Equations ◽  
The Standard Model

Abstract We derive one- and two-loop renormalization group equations (RGEs) of Higgs-R2 inflation. This model has a non-minimal coupling between the Higgs and the Ricci scalar and a Ricci scalar squared term on top of the standard model. The RGEs derived in this paper are valid as long as the energy scale of interest (in the Einstein frame) is below the Planck scale. We also discuss implications to the inflationary predictions and the electroweak vacuum metastability.

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