quantum field theory? More unsolved problems in physics In cosmology, the cosmological constant problem or vacuum catastrophe is the substantial disagreement...

cosmology, the cosmological constant (usually denoted by the Greek capital letter lambda: Λ), alternatively called Einstein's cosmological constant,...

of a tiny, but nonzero cosmological constant. This problem, called the cosmological constant problem, is a hierarchy problem very similar to that of...

vacua, the problem of finding one with a sufficiently small cosmological constant is NP complete. This is a version of the subset sum problem. A possible...

Physical cosmology is a branch of cosmology concerned with the study of cosmological models. A cosmological model, or simply cosmology, provides a description...

cosmological principle is false? Cosmological constant problem: Why does the zero-point energy of the vacuum not cause a large cosmological constant?...

universe we observe today. This discrepancy is known as the cosmological constant problem and it is one of the greatest unsolved mysteries in physics...

influence the behavior of the Universe on cosmological scales. Using the upper limit of the cosmological constant, the vacuum energy of free space has been...

produce incorrect results.: 2  The measure problem is important in cosmology because in order to compare cosmological theories in an infinite multiverse, we...

Sinks in the landscape, Boltzmann brains and the cosmological constant problem. Journal of Cosmology and Astroparticle Physics, 2007(01), 022. Sean Carroll...

observable universe? Cosmological constant problem: Why does the zero-point energy of the vacuum not cause a large cosmological constant? Size and shape of...

in addressing the so-called cosmological constant problem. One of the earliest documented attempts to apply brane cosmology as part of a conceptual theory...

Bousso proposed the string theory landscape as a solution to the cosmological constant problem. Bousso was born in Haifa, Israel, the son of late scientist...

The flatness problem (also known as the oldness problem) is a cosmological fine-tuning problem within the Big Bang model of the universe. Measurements...

in 2019, he has proposed a solution to the cosmological constant problem from arguing that Newton's constant varies globally. In 2015 and 2016, Lombriser...

suggest that 1.069 < q < 1.082 is a possible new solution to the cosmological lithium problem. When one considers the possibility that the measured primordial...

effect, cosmological coupling and shockwave cosmology (see the section § Alternatives to dark energy). The "cosmological constant" is a constant term that...

In physical cosmology, cosmic inflation, cosmological inflation, or just inflation, is a theory of exponential expansion of space in the very early universe...

"Sinks in the landscape, Boltzmann brains and the cosmological constant problem". Journal of Cosmology and Astroparticle Physics. 2007 (1): 022. arXiv:hep-th/0611043...

Einstein's cosmological constant but also extending to more exotic forms of quintessence or other modified gravity schemes. A cosmological constant problem, sometimes...

data. For solar neutrino analysis, lowering the energy threshold is a constant goal, so it is a continual effort to improve the efficiency of reduction...

Tμν is the stress–energy tensor, Λ is the cosmological constant and κ is the Einstein gravitational constant. The Einstein tensor is defined as G μ ν =...

non-zero cosmological constant resulting in an accelerating universe would have been considered non-standard in 1990, but is part of the standard cosmology in...

"Sinks in the landscape, Boltzmann brains and the cosmological constant problem". Journal of Cosmology and Astroparticle Physics. 2007 (1): 022. arXiv:hep-th/0611043...

quantum field theory, and also between the hierarchy problem and the cosmological constant problem. Both issues suggest the possibility of corrections...

"Sinks in the landscape, Boltzmann brains and the cosmological constant problem". Journal of Cosmology and Astroparticle Physics. 2007 (1): 022. arXiv:hep-th/0611043...

initial value problem and its equations of motion coincide with the initial value problem and equations of motion of the ADM formalism in constant mean extrinsic...

candidate forces suggested by modern cosmology: an inflationary force and dark energy. Furthermore, cosmological experiments also suggest the existence...

1016/j.physrep.2023.06.002. Weinberg, Steven (1989-01-01). "The cosmological constant problem". Reviews of Modern Physics. 61 (1): 1–23. doi:10.1103/RevModPhys...

example, the cosmological constant problem (why is the cosmological constant so small?); the hierarchy problem; and the strong CP problem, among others...