Vacuum Energy in Two Dimensional Box Through the Krein Quantization
Sign Up to like & getrecommendations! Published in 2017 at "International Journal of Theoretical Physics"
DOI: 10.1007/s10773-016-3231-4
Abstract: In this work we reexamine the Casimir effect in which the vacuum expectation value of quantum fields is calculated over a so-called Krein space. This method has already been successfully applied to study Casimir effect… read more here.
Keywords: vacuum energy; krein quantization; box; energy ... See more keywords
Late-time acceleration by a residual cosmological constant from sequestering vacuum energy in ultimate collapsed structures
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2019/09/065
Abstract: The sequestering mechanism has been proposed as a remedy to the old cosmological constant problem of the non-gravitating vacuum energy in the matter sector. Here it is shown that an extension of this global constraint… read more here.
Keywords: cosmological constant; residual cosmological; collapsed structures; vacuum energy ... See more keywords
Weighing the vacuum energy
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review D"
DOI: 10.1103/physrevd.103.084032
Abstract: We discuss the weight of vacuum energy in various contexts. First, we compute the vacuum energy for flat spacetimes of the form $\mathbb{T}^3 \times \mathbb{R}$, where $\mathbb{T}^3$ stands for a general 3-torus. We discover a… read more here.
Keywords: vacuum energy; weighing vacuum; energy;
Stable equilibrium point and oscillatory motion of the Universe in a model with variable vacuum energy
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review D"
DOI: 10.1103/physrevd.95.043522
Abstract: We discuss the mechanism by which the field vacuum energy varies as a result of strong self-interaction. We propose a non-perturbative approach to treat strong interactions and discuss the problem in terms of quasi-particles describing… read more here.
Keywords: field; vacuum energy; vacuum; equilibrium point ... See more keywords
Coupled vacuum energy model producing endless alternated phases of accelerated and decelerated expansion
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review D"
DOI: 10.1103/physrevd.95.083504
Abstract: We consider a flat Universe filled with a vacuum energy coupled to matter and radiation by respectively positive coupling functions $Q_m$ and $Q_r$. We require that these functions be such as Universe exits from inflation… read more here.
Keywords: expansion; vacuum energy; accelerated decelerated; decelerated expansion ... See more keywords
Inflation compactification from dynamical spacetime
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review D"
DOI: 10.1103/physrevd.98.043522
Abstract: A mechanism of inflation from higher dimensions compactification is studied. An Early Universe capable of providing exponential growth for some dimensions and exponential contraction for others, giving therefore an explanation for the big size of… read more here.
Keywords: vacuum energy; inflation; volume; inflation compactification ... See more keywords
Theta dependence of the vacuum energy density in chiral effective Lagrangian models at finite temperature, above Tc
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review D"
DOI: 10.1103/physrevd.99.114009
Abstract: In this work, extending a previous study at zero temperature ($T=0$), we perform a systematic study of the modifications to the QCD vacuum energy density $\epsilon_{vac}$ in the finite-temperature case, above the chiral transition at… read more here.
Keywords: vacuum energy; energy density; lagrangian models; finite temperature ... See more keywords
The elastic vacuum
Sign Up to like & getrecommendations! Published in 2021 at "International Journal of Modern Physics D"
DOI: 10.1142/s0218271821410017
Abstract: The quantum gravity vacuum must contain virtual fluctuations of black hole microstates. These extended-sized fluctuations get “crushed” when a closed trapped surface forms, and turn into on-shell “fuzzball” states that resolve the information puzzle. We… read more here.
Keywords: vacuum energy; vacuum; elastic vacuum; phase ... See more keywords
Quantum Vacuum Energy of Self-Similar Configurations
Sign Up to like & getrecommendations! Published in 2021 at "Universe"
DOI: 10.3390/universe7050128
Abstract: We offer in this review a description of the vacuum energy of self-similar systems. We describe two views of setting self-similar structures and point out the main differences. A review of the authors’ work on… read more here.
Keywords: self similar; energy; vacuum energy; energy self ... See more keywords