
	Where results make sense

Topic: Vacuum fluctuations

Related Topics

Spontaneous symmetry breaking

Lie group

	HELIOGNOSIS - Observations of vacuum fluctuations suggests the existence of Zero Point Energy
		With an AC electric field of 246V peak-to-peak, the vacuum fluctuations present themselves as a dynamic quasi-cyclic current oscillation in the very low frequency (vlf) and ultra-low frequency (ulf) range with a magnitude of 0.02%.
		These magnetic voltage fluctuations are shown to be experimentally distinguishable from the voltage fluctuations associated with the well known Nyquist noise¹.
		The vacuum fluctuations were found to increase proportionately to the input plate voltage.
	www.heliognosis.com /rd02.html (1540 words)

	Vacuum - Wikipedia, the free encyclopedia
		In modern day usage vacuum is considered to exist in an enclosed space or chamber, when the pressure of gaseous environment is lower than atmospheric pressure (760 Torr or 101 kPa), or has been reduced as much as necessary to prevent the influence of some gas on a process being carried out in that space.
		Thus a vacuum of 26 inHg is equivalent to a pressure of (29.92 - 26) or 3.92 inHg.
		Vacuum fluctuations may also be related to the so-called cosmological constant in the theory of gravitation, if indeed this entity were to be observed in nature on a macroscopic scale.
	en.wikipedia.org /wiki/Vacuum (2969 words)

	Vacuum energy - Wikipedia, the free encyclopedia
		Quantum field theory considers the vacuum ground state not to be completely empty, but to consist of a seething mass of virtual particles and fields.
		Some believe that vacuum energy might be the "dark energy" (also called quintessence) associated with the cosmological constant in general relativity and thought to be similar to a negative force of gravity.
		During the 1980s, there were many attempts to relate the fields that generate the vacuum energy to specific fields that were predicted by the Grand unification theory, and to use observations of the Universe to confirm that theory.
	en.wikipedia.org /wiki/Vacuum_energy (428 words)

	The Casimir effect: a force from nothing (September 2002) - Physics World - PhysicsWeb
		This phenomenon is a consequence of vacuum fluctuations.
		In a free vacuum all of the frequencies are of equal importance.
		Vacuum fluctuations are suppressed or enhanced depending on whether their frequency corresponds to a cavity resonance or not.
	physicsweb.org /articles/world/15/9/6 (3353 words)

	[The following article originally appeared in +quot;Frontier Perspectives+quot; (vol. 2 nu (Site not responding. Last check: 2007-10-22)
		The most fundamental quantum concept is that the vacuum is fluctuating at a zero-point energy level, the ground state for vibration of an harmonic oscillator.
		Thus, the atom is actually in a continuous interactive mode with the vacuum fluctuations continually being absorbed and re-emitted.
		Such vacuum witness-plate marks are also observed in welding where instead of million volt beams there are 10 to 50 volt differences between electrodes spaced very closely together, and the voltage is raised until they spark.
	www.skepticfiles.org /science/vacuumsc.htm (3387 words)

	Science Tribune
		Vacuum fluctuations, also called zero-point fluctuations, as well as any observable effect they have on physical objects, are a manifestation of the quantum nature of the electromagnetic field.
		Vacuum polarization shows that the quantum electromagnetic vacuum acts as a polarizable medium in line with modern physics' general view of vacuum as a system endowed with intrinsic dynamics.
		Vacuum fluctuations and vacuum polarization effects exist not only in the framework of quantum electrodynamics but also of quantum chromodynamics.
	www.tribunes.com /tribune/art98/pass.htm (4086 words)

	Limits (Site not responding. Last check: 2007-10-22)
		Quantum field fluctuations exert a radiation pressure on a scatterer at rest in vacuum.
		When the mirror is moving in vacuum, it experiences a mean force which tends to oppose to its motion.
		The mechanical action of the vacuum radiation pressure transmits quantum fluctuations to the position on the mirror.
	arachne.spectro.jussieu.fr /Vacuum/English/Limites (630 words)

	Creation ex nihilo - Without God
		Eventually, I would like to write an article assessing the value of quantum vacuum fluctuations as a means of producing universes, but for the time being, I will just let the scientists speak for themselves and leave evaluation to the reader.
		This does not violate energy conservation since the false vacuum has a negative pressure (believe me, this is all follows from the equations that Einstein wrote down in 1916) so the expanding bubble does work on itself.
		Zel'dovich in Moscow suggest that the universe began as a perfect vacuum and that all the particles of the material world were created from the expansion of space...
	www.infidels.org /library/modern/mark_vuletic/vacuum.html (1727 words)

	The Physics of Encounter (Site not responding. Last check: 2007-10-22)
		In describing quantum vacuum fluctuations, the use of terms implying the passage of time is an unavoidable concession to the exigencies of language.
		In the proximity of an object, the probability is higher that the res sphere surfaces emanating from that object have not yet collapsed due to encounters with res sphere surfaces of the ambient vacuum fluctuations.
		Vacuum fluctuations of cosmic proportions could result in the creation or collapse of an entire universe without violating the laws of physics.
	www.physics-of-encounter.com /main.html (12466 words)

	Stardrive.org - - Can the Vacuum be Engineered for Spaceflight Applications? Overview of Theory and Experiments, by Dr. ...
		It was the advent of modern quantum theory, however, that established the quantum vacuum, so-called empty space, as a very active place, with particles arising and disappearing, a virtual plasma, and fields continuously fluctuating about their zero baseline values.
		This raises the possibility of utilizing a "sub-cosmic-ray" approach to accelerate protons in a cryogenically-cooled, collision-free vacuum trap and thus extract energy from the vacuum fluctuations by this mechanism.
		Thus, in the example of the train the punch was delivered by the wall of vacuum fluctuations acting as a proxy for the fixed stars through which one attempted to accelerate.
	www.stardrive.org /puthoff.shtml (3251 words)

	Vacuum (Site not responding. Last check: 2007-10-22)
		A perfect vacuum is an ideal state that cannot really exist, but is best approximated by outer space.
		Much of outer space is for all practical purposes an almost perfect vacuum, with only a small number of atoms per cubic metre, the most common being hydrogen (H) and helium (He).
		In 1887 the Michelson-Morley experiment, using an interferometer to attempt to detect the change in the speed of light caused by the Earth moving with respect to the aether, was a famous null result, showing that there really was no pervasive medium throughout space.
	www.worldhistory.com /wiki/V/Vacuum.htm (2544 words)

	Historical Notes: Vacuum fluctuations
		Insofar as such vacuum fluctuations are always exactly the same, however, they presumably cannot be detected.
		If one has moving boundaries it turns out that vacuum fluctuations can in effect be viewed as producing real particles.
		What happens in essence is that the modes of fields in different background spacetime structures differ to the point where zero-point excitations seem like actual particle excitations to a detector or observer calibrated to fields in ordinary fixed flat infinite spacetime.
	www.wolframscience.com /reference/notes/1062a (604 words)

	unification, spacetime foam, quantum vacuum, quantum fluctuations
		The quantum vacuum is the ground state of energy for the Universe, the lowest possible level.
		It is the quantum vacuum that such characteristics emerge from, particles `stand-out' from the vacuum, waves `undulate' on the underlying vacuum, and leave their signature on objects in the real Universe.
		In this sense, the Universe is not filled by the quantum vacuum, rather it is `written on' it, the substratum of all existence.
	zebu.uoregon.edu /~js/ast123/lectures/lec17.html (2014 words)

	May 6: quantum vacuum, quantum fluctuations (Site not responding. Last check: 2007-10-22)
		The quantum vacuum is the ground state of energy for the Universe, the lowest possible level.
		It is the quantum vacuum that such characteristics emerge from, particles `stand-out' from the vacuum, waves `undulate' on the underlying vacuum, and leave their signature on objects in the real Universe.
		The Universe is not filled by the quantum vacuum, rather it is `written on' it, the substratum of all existence.
	blueox.uoregon.edu /~karen/astro123/lectures/lec15.html (765 words)

	Everything for Nothing (Site not responding. Last check: 2007-10-22)
		In fact, according to quantum theory, the vacuum, the space between particles of matter as well as between the stars, is not empty, it is filled with vast amounts of fluctuating energy.
		This zero-point energy is the result of the unpredicatable random fluctuations of the vacuum energy, as predicted by the uncertainty principle, which is zero in classical theory.
		Out of this work emerged the reasons for such phenomena as the uncertainty principle, the fluctuating motion of particles, the existence of van der Waals forces even at zero temperature, and so forth, all show to be due to the influence of the unceasing activity of the random background fields.
	www.sumeria.net /free/zpe4.html (2798 words)

	NASA - Some Emerging Possibilities
		Zero Point Energy (ZPE), or vacuum fluctuation energy are terms used to describe the random electromagnetic oscillations that are left in a vacuum after all other energy has been removed.
		Examples include the Casimir effect, Van der Waal forces, the Lamb-Retherford Shift, explanations of the Planck flbody radiation spectrum, the stability of the ground state of the hydrogen atom from radiative collapse, and the effect of cavities to inhibit or enhance the spontaneous emission from excited atoms.
		The vacuum fluctuations have also been theorized by Haisch, Rueda, and Puthoff to cause gravity and inertia.
	www.nasa.gov /centers/glenn/research/warp/possible.html (1496 words)

	sciforums.com - Casimir effect and quantum processes (Site not responding. Last check: 2007-10-22)
		I ask this because I understand that certain physical processes such as the spontaneous emission of a photon from an atom in an excited state is the consequence of interaction with vacuum fluctuations.
		Besides I think that Crisp is correct that some fluctuations in the vacuum itself are needed for the incidental natural processes.
		This fluctuations represents accualy the zero-point energy of the vacuum.
	www.sciforums.com /showthread.php?t=21698 (603 words)

	National Institute for Discovery Science: Can the Vacuum be Engineered for Spaceflight Applications? by H.E. Puthoff (Site not responding. Last check: 2007-10-22)
		At its most fundamental level, we now recognize that the quantum vacuum is an enormous reservoir of untapped energy, with energy densities conservatively estimated by Feynman and Hibbs (1965) to be on the order of nuclear energy densities or greater.
		An example in which Nature herself may have taken advantage of energetic vacuum effects is discussed in a model published by ZPE colleagues A. Rueda of California State University at Long Beach, B. Haisch of Lockheed-Martin, and D. Cole of IBM (1995).
		The first hint that these phenomena might themselves be traceable to roots in the underlying fluctuations of the vacuum came in a study published by the well-known Russian physicist Andrei Sakharov (1968).
	www.nidsci.org /articles/puthoff_spaceflight.php (3275 words)

	Relativity (Site not responding. Last check: 2007-10-22)
		The equivalence between an accelerated vacuum and a thermal bath, often quoted as the Unruh effect, and the resulting insoluble paradoxes appear to be artefacts due to an inadapted representation of accelerated frames.
		In contrast, a scatterer with a non uniform acceleration radiates photons since it squeezes vacuum fluctuations.
		Energy conservation implies that vacuum exerts a force which tends to bring the motion back to a uniformly accelerated one.
	arachne.spectro.jussieu.fr /Vacuum/English/Relativite (487 words)

	Do You Practice Good Milking Procedures?, G86-778-A (Site not responding. Last check: 2007-10-22)
		These fluctuations increase teat tissue stress, the risk of teat damage, and the risk of new infections due to "reverse droplet impacts." Keep the inflation stem or tailpiece bent in a slight "S-shaped" curve against the claw ferrule until the teat cup is in an upright position ready to slide onto the teat.
		Removing units while the vacuum is still being applied causes extreme stress on the teat and extreme vacuum fluctuations, which increase the risk of new infections.
		Turn off the vacuum and wait three to five seconds while the vacuum in the claw is relieved through the vent.
	ianrpubs.unl.edu /Dairy/g778.htm (1872 words)

	Alternate View Column AV-53
		The theory of quantum electrodynamics tells us that the vacuum, (i.e., empty space) when examined on very small distance scales is not empty at all; it seethes with a kind of fireworks called vacuum fluctuations.
		These vacuum fluctuations can be squeezed in the same way that light beams or systems of atoms can be squeezed, and the result is a vacuum that has an energy less than zero, in other words, a region of negative energy of just the king needed for wormhole stabilization.
		Hochberg and Kephart have now demonstrated that the natural and inevitable squeezing of the vacuum as it evolves in a strong gravitational field is in violation of the weak energy condition.
	www.npl.washington.edu /AV/altvw53.html (1886 words)

	Professor Stephen Hawking
		One can interpret these so called vacuum fluctuations, as pairs of particles and anti particles, that suddenly appear together, move apart, and then come back together again, and annihilate each other.
		The result is that there are slightly fewer vacuum fluctuations, or virtual particles, between the plates, than outside them, where vacuum fluctuations can have any wavelength.
		Because there are fewer virtual particles, or vacuum fluctuations, between the plates, they have a lower energy density, than in the region outside.
	www.hawking.org.uk /lectures/warps3.html (1603 words)

	projects
		This effort will answer many of the basic questions about the role of vacuum fluctuations, and lay a solid foundation of knowledge about vacuum energy, vacuum stress and how to control them using surfaces and what their limitations are.
		The discovery of the Lamb shift led to a Nobel prize, and to the formulation of QED and the quantum vacuum.
		One of Dr. Maclay’s research efforts at UIC was the application of micromachining methods to investigate vacuum fluctuation effects, such as Casimir forces.
	www.quantumfields.com /projects.htm (2809 words)

	Zero Point Energy (ZPE)
		When there are two or more particles they are each influenced not only by the fluctuating background field, but also by the fields generated by the other particles, all similarly undergoing ZITTERBEWEGUNG motion, and the inter-particle coupling due to these fields results in the attractive gravitational force.
		Out of this work emerged the reasons for such phenomena as the uncertainty principle, the incessant fluctuation of particle motion, the existence of Van der Waals forces even at zero temperature, and so forth, all shown to be due to the influence of the unceasing activity of the random background fields.
		After all, since the basic zero-point energy form is highly random in nature, and tending towards self-cancellation, if a way could be found to bring order out of chaos, the, because of the highly energetic nature of the vacuum fluctuations, relatively large effects could in principle be produced.
	www.ldolphin.org /zpe.html (2233 words)

	Can the Vacuum be Engineered for Spaceflight Applications? Overview of Theory and Experiments
		The concept "engineering the vacuum" was first introduced by Nobel Laureate T. Lee in his book Particle Physics and Introduction to Field Theory.
		Surprisingly enough, there are hints that potential help may in fact emerge quite literally out of the vacuum of so-called "empty space." Quantum theory tells us that empty space is not truly empty, but rather is the seat of myriad energetic quantum processes that could have profound implications for future space travel.
		We began this discussion with the question: "Can the vacuum be engineered for spaceflight applications?" The answer is: "In principle, yes." However, engi neering-wise it is clear that there is a long way to go.
	www.padrak.com /ine/ZPEFLIGHT.html (3366 words)

	[No title] (Site not responding. Last check: 2007-10-22)
		One possible source is a buzzing of empty space known as vacuum fluctuations.
		Quantum theory implies that a vacuum is constantly fizzing with particles that pop in and out of existence.
		If vacuum fluctuations are responsible for dark energy, say Beck and Mackey, then the energy density of these fluctuations should be the same as the density of dark energy that has been calculated from astronomical observations.
	www.nature.com /news/2004/040705/pf/430126b_pf.html (543 words)

	Non-spacetime blackhole formation from quantum vacuum fluctuations? (Site not responding. Last check: 2007-10-22)
		Krauss has a simple explanation of such wormholes--he feels that what a wormhole goes through is not three dimensional space, therefore there is nothing for the wormhole to exist in because curved spacetime is all there is in the cosmos.
		But if you would take the suggested pairs of "virtual particles" predicted by the quantum electrodynamic theory, that exist in a vacuum fluctuation where by Heisenberg's uncertanity principle indicates they would annihilate each other and vanish when their energy need is lacking.
		Could we squeezed such vacuum fluctuations in a manner that would generate an area of negative energy--the kind needed for a wormhole?
	superstringtheory.com /forum/extraboard/messages10/436.html (218 words)

Try your search on: Qwika (all wikis)