Sentences with phrase «vacuum energy»

One of the most interesting aspects of vacuum energy (with or without mirrors) is that, calculated in quantum field theory, it is infinite!

The football is where the crew and robotic systems would be, while the ring would contain exotic matter called negative vacuum energy, a consequence of quantum mechanics.

The possibilities being discussed for dark energy range from quantum vacuum energy to the influence of the unseen extra dimensions predicted by string theory.

Such a field could vary in strength over time and throw off the calculations based on a constant vacuum energy.

But the natural answer that we would pick would be about a 120 orders of magnitude larger than the observed vacuum energy.

Although this trick works, and gives answers in agreement with experiment, the problem of an infinite vacuum energy is a serious one.

16 Current theories suggest that the universe was created out of a state of vacuum energy, that is, nothing.

It must be an energy form even more exotic than quantum vacuum energy.

Think of it as a kind of vacuum energy permeating the fabric of spacetime that defies measure.»

When the idea was first proposed mathematically in 1994 it required a vast amount of negative vacuum energy which made the idea seem impossible.

The mathematical solution is to temporarily do the calculation for a finite number of waves for two different separations of the mirrors, find the associated difference in vacuum energies and then argue that the difference remains finite as one allows the number of wavelengths to go to infinity.

The most precise calculation of the lifetime of our universe finds that a bubble of vacuum energy made by the Higgs boson could envelop us all in 10139 years

Most physicists suspect that dark energy is a form of vacuum energy known as the «cosmological constant» because its strength never varies.

String theory may have something to say about how much quantum nothingness weighs because it actually permits the calculation of vacuum energy without pesky infinities cropping up.

They're called virtual particles, and the energy associated with the background hum of their constant appearance and disappearance became the way in which we understand the source of repulsive vacuum energy.

The elusive Casimir effect suggests we could use vacuum energy to move objects and make stuff — but can something really come from nothing?

The vast majority of universes that burst into being in this way are thick with vacuum energy; they either expand or collapse so quickly that life can not arise in them.

So I would be much happier if all this will go away, but I will still argue that this is a very reasonable explanation, and it could even be the right explanation for why [the] vacuum energy that we observed is so unbelievably small compared to what we would theoretically expect.

String theory tells us that there is not just one vacuum, but there is a huge number of vacua, possible vacua, 10500 or so, crazy numbers that people talk about, and that means that each one of them has a different vacuum energy.

Among this enormous multiplicity of pocket universes, Susskind further contends, there is bound to be one with just the right vacuum energy to permit the emergence of intelligent beings.

He suggested, in work done in the 1940s with fellow Dutch physicist Dirk Polder, that two metal plates held apart in a vacuum could trap the waves, creating vacuum energy that, depending on the situation, could attract or repel the plates.

Think of it as a kind of vacuum energy permeating the fabric of spacetime that defies measure.

You would have an initial velocity as you set off, and then when you turn on the ring of negative vacuum energy it augments your velocity.

Moreover the Nexus graviton can also be considered as a globule of vacuum energy which can merge and de-merge with others in a process that resembles cytokineses in cell biology.

As the boundaries of a region of vacuum move, the variation in vacuum energy (also called zero - point energy) leads to the Casimir effect.

(It's called a constant because any part of space should possess the same amount of vacuum energy.)

Very good point Paul, I was referring to vacuum energy as opposed to a nothing which is a null state of spacetime,

To understand the answer to your question you need to know a little something about the cosmological constant, vacuum energy and virtual particles.

That much energy would literally blow the universe apart: Objects a few inches from us would be carried away to astronomical distances; the universe would literally double in size every 10 - 43 second, and it would keep doubling at that rate until all the vacuum energy was gone.

«We demonstrate that the simplest small mixing, related to the ratios of the scale at which electroweak physics operates, and a possible Grand Unified Scale, produces a possible contribution to the vacuum energy today of precisely the correct order of magnitude to account for the observed dark energy,» Krauss explained.

Maybe the vacuum energy driving cosmic acceleration is not a cosmological constant after all, but some other sort of field filling space.

But Riess pointed out that the evidence is growing stronger and stronger that the vacuum energy is just the cosmological constant.

Just for good measure, the panel also dismissed the possibility that RHIC would trigger a phase transition in the cosmic vacuum energy (see # 3).

The presence of this toroidal ring of negative vacuum energy is what's required from the math and physics to be able to use the warp trick.

If dark energy is the venerable cosmological constant that Einstein shoehorned into his equations of general relativity, its favoured source is vacuum energy.

Nor do the results help scientists determine which of their theories best describes what dark energy is — in particular, whether it is «vacuum energy» inherent in space itself or some sort of «quintessence» force that might change over time.

And there are good arguments that you might only find them when the vacuum energy is incredibly small, because a larger vacuum energy blows the universe apart, [it] produces a repulsive force before galaxies could form, and if you believe that observers only form in their galaxies, no observers in those universes.

There's not going to be a new theory there, there is no one experiment that's going to show [that it] is vacuum energy, but there will be many experiments that will pin down its properties, so that we'll eventually perhaps decide [that it] is so much like vacuum energy that it just must be vacuum energy.

It may very well just be vacuum energy.

If it is just vacuum energy all we can do is, sort of, further constrain it to be more and more like vacuum energy.

So, the big question is «What in the world explains why the vacuum energy is so unbelievably small?»

Each version corresponds to a different universe with what might be called its own local weather: vacuum energy, number of dimensions, elementary particle masses, coupling constants, and so on.

Rather than preventing the universe from collapse, the vacuum energy it describes can explain why the universe now expands at an accelerating pace.