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Physics, Volume 1, Issue 3

December 2019 - 8 articles

Cover Story: The energy density of the vacuum, the dark energy, and the cosmological constant are highly debated topics today, as quantum field theory suggests a typical number that is some 120 orders of magnitude larger than what has been observed. On the other hand, the corresponding zero-point energy in equilibrium condensed-matter systems is fully cancelled by the microscopic degrees of freedom, which serve as atomic analogues of the Planck-scale degrees of freedom of the quantum vacuum. In a similar way, q-theory, which uses the 4-form field introduced by Hawking to describe the quantum vacuum, demonstrates the nullification of the dark energy in a full-equilibrium vacuum. The fate of this q-bubble depends on the initial conditions, changing from full dispersion of the vacuum energy to black hole collapse. View this paper.
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Articles (8)

  • Article
  • Open Access
15 Citations
5,299 Views
15 Pages

17 December 2019

In this paper, we dwell on three issues: (1) revisit the relation between vacuum fluctuations and radiation reaction in atom-field interactions, an old issue that began in the 1970s and settled in the 1990s with its resolution recorded in monographs;...

  • Article
  • Open Access
2 Citations
3,899 Views
18 Pages

6 December 2019

Here we introduce the latest version of the GAMESH model, capable to consistently account for the formation and evolution of compact binary systems along the cosmic assembly of a Milky Way (MW)-like galaxy, centered on a local group volume resolving...

  • Article
  • Open Access
4 Citations
5,009 Views
10 Pages

3 December 2019

Radio-frequency (RF) charged particle traps, such as the Paul trap or higher order RF multipole traps, may be used to trap quasi-neutral plasma. The presence of positive and negative plasma species mitigates the ejection of particles that occurs due...

  • Article
  • Open Access
5 Citations
3,460 Views
10 Pages

Proposal of a Computational Approach for Simulating Thermal Bosonic Fields in Phase Space

  • Alessandro Sergi,
  • Roberto Grimaudo,
  • Gabriel Hanna and
  • Antonino Messina

3 December 2019

When a quantum field is in contact with a thermal bath, the vacuum state of the field may be generalized to a thermal vacuum state, which takes into account the thermal noise. In thermo field dynamics, this is realized by doubling the dimensionality...

  • Article
  • Open Access
5 Citations
5,260 Views
17 Pages

26 November 2019

We present an open-source kinematic fitting routine designed for low-energy nuclear physics applications. Although kinematic fitting is commonly used in high-energy particle physics, it is rarely used in low-energy nuclear physics, despite its effect...

  • Article
  • Open Access
2 Citations
5,216 Views
15 Pages

Photodetector Spectral Response Estimation Using Black Body Radiation

  • Riccardo Maria Liberati,
  • Alessio Del Paggio and
  • Massimiliano Rossi

19 November 2019

We propose a method for the estimation of the spectral response of a photodetector, using only the variation of the temperature of a black body source without the need of an expensive monochromator or a circular filter. The proposed method is suitabl...

  • Article
  • Open Access
4 Citations
3,841 Views
18 Pages

Vacuum Energy Decay from a q-Bubble

  • Frans R. Klinkhamer,
  • Osvaldo P. Santillán,
  • Grigory E. Volovik and
  • Albert Zhou

1 November 2019

We consider a finite-size spherical bubble with a nonequilibrium value of the q-field, where the bubble is immersed in an infinite vacuum with the constant equilibrium value q 0 for the q-field (this q 0 has already cancelled an initi...

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Physics - ISSN 2624-8174