英語 での Cosmological constant の使用例とその 日本語 への翻訳
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Change the cosmological constant.
The leading idea for dark energy is that it is a cosmological constant.
This"cosmological constant" is one of just six numbers needed to make a model that matches the shape and large-scale structure of the Universe.
You can't change the cosmological constant.
Vacuum energy may also beresponsible for the current accelerated expansion of the universe(cosmological constant).
Like Carlip,Ng also derives the large value for a positive cosmological constant using a model of spacetime bubbles.
In physics, this equation states that(M, g)is a solution of Einstein's vacuum field equations with cosmological constant.
And remember, he was, invented cosmological constant as a means of preventing the expan, collapse of the universe for that wasn't really needed.
And I would link that to something called the cosmological constant.
If you look at the cosmological constant, where there's an anthropic ideal, where you see that life had to evolve from the numbers that describe the universe-- these are things that are really difficult to understand.
Or is it a kind of serendipity that we cannot explain, like the cosmological constant?
There are so many different proposals[to solve the cosmological constant problem], and a good sign for my research is that none of them is very widely accepted,” Carlip said in an interview.
The simplest explanation was that empty space- the vacuum-had an energy density that was a cosmological constant.
Quantum foam is having something of a moment,not just as a solution to the Cosmological Constant Problem, but also to address other enigmas in physics, like black holes, quantum computers, and dark energy.
Our proposal is very general, and any violation of energyconservation is expected to contribute to an effective cosmological constant.
Now that modern observations show that theuniverse is expanding at an accelerating rate, the cosmological constant today can be thought of as the simplest form of dark energy, offering a way to account for current observations.
When incorporating the uncertainty principle andgeneral relativity one can either adjust the strength of gravity or the cosmological constant.
Currently there is no way to tell whether the violations of energy conservationinvestigated here truly did affect the cosmological constant, but the physicists plan to further investigate the possibility in the future.
In my view, the primary issue is not the mass of the universe, or the possible existence of antigravity,or of Einstein's so-called cosmological constant.
If you look at the math, E=mc squared,if you look at the cosmological constant, where there's an anthropic ideal, where you see that life had to evolve from the numbers that describe the universe-- these are things that are really difficult to understand.
This fact was demonstrated in 1990, when Hideo Kodama of Kyoto University wrote down equations describing an exactquantum state of a universe having a positive cosmological constant.
The theory could potentially explainwhy a repulsive form of energy known as the cosmological constant, which is accelerating the expansion of the universe, is several orders of magnitude smaller than predicted by the standard Big Bang model.
But when scientists discovered that the universe was expanding rather than static,as Einstein had believed, the cosmological constant was set to zero and more or less ignored.
Like Guth, they concluded that such a modelnot only required fine tuning of the cosmological constant, but also would very likely lead to a much too granular universe, i.e., to large density variations resulting from bubble wall collisions.
Some might become four-dimensional, others could contain only two rather than three generations of quarks,and still others might have a stronger cosmological constant than our universe does.
To explain this disagreement, some research has suggested that the cosmological constant may be an entirely new constant of nature that must be measured more precisely, while another possibility is that the underlying mechanism assumed by theory is incorrect.
Professor Steven Carlip at University of California, Davis, published new research in September that builds on Wheeler's quantum foamtheory to show that spacetime bubbles could“hide” the cosmological constant at a large scale.
Whatever the source of the energy conservation violation, the important result is that the energy that was created orlost affected the cosmological constant to a greater and greater extent as time went by, while the effects on matter decreased over time due to the expansion of the universe.
On the other hand, direct evidence that dark energy is sourced by energy non-conservation seems largely out-of-reach,as we have access to the value of lambda[the cosmological constant] today and constraints on its evolution at late time only.".