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Topic: Alcubierre drive

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Alcubierre metric

Warp drive

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Breakthrough Propulsion Physics Program

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Interstellar travel

Diametric drive

Spacecraft propulsion

General relativity

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	Alcubierre drive
		The Alcubierre drive, also known as the Warp drive, is a hypothetical method for propelling a spacecraft faster than the speed of light.
		The physicist Miguel Alcubierre[?] proposed a method of stretching space in a wave, causing the space "ahead" of a spacecraft to contract along the axis the spacecraft wishes to travel in and the space "behind" it to expand.
		Note that the term "Warp drive" is used in science fiction to denote a wide variety of imaginary propulsion methods, most of which have nothing to do with the Alcubierre drive or any other physical theory.
	www.ebroadcast.com.au /lookup/encyclopedia/al/Alcubierre_drive.html (182 words)

	Alcubierre drive - Wikipedia, the free encyclopedia
		The Alcubierre metric, also known as the Alcubierre drive or warp drive, is a speculative mathematical model of a spacetime exhibiting some features reminiscent of the fictional faster than the speed of light warp drive from Star Trek; hence the name.
		The Alcubierre Drive is often called a 'solution' of Einstein's field equations in general relativity, but this is inaccurate; see Alcubierre metric.
		The physicist Miguel Alcubierre proposed a method of stretching space in a wave, causing the space "ahead" of a spacecraft to contract along the axis the spacecraft wishes to travel in and the space "behind" it to expand.
	en.wikipedia.org /wiki/Alcubierre_drive (947 words)

	Reactionless Drives
		The theory behind a warp drive was first explained in the Interplanetary Era by M. Alcubierre, with refinements by J. Natario and others, to the extent that the historical literature of the times generally refers to warp devices as Alcubierre or Natario drives.
		Drive nodes are constructed in either the Alcubierre or Natario configuration: in either case, the nanoscopic nodes are linked back to the main vessel via electromagnetic fields.
		Void drives appear to operate on the same basic principle of the generation and manipulation of void bubble warps as is employed by the Displacement and Halo drive systems.
	www.orionsarm.com /ships/Reactionless_Drives.html (2130 words)

	Alcubierre warp drive
		Alcubierre was interested in the possibility of whether Star Trek's fictional "warp drive" could ever be realized.
		Also, being locally stationary, the starship and its crew would be immune from any devastatingly high accelerations and decelerations (obviating the need for "inertial dampers"), and from relativistic effects such as time dilation (since the passage of time inside the warp bubble would be the same as that outside).
		By a purely local expansion of spacetime behind the spaceship and an opposite contraction in front of it, motion faster than the speed of light as seen by observers outside the disturbed region is possible.
	www.daviddarling.info /encyclopedia/A/Alcubdrive.html (589 words)

	Alcubierre warp drive/CetinBAL-GSM:+90 05366063183-Turkey/Denizli
		The Alcubierre metric, also known as the Alcubierre drive or warp drive, is a speculative mathematical model of a spacetime exhibiting some features reminiscent of the fictional faster than the speed of light warp drive from Star Trek; hence the name.
		The original warp drive metric, and simple variants of it, happen to have the ADM form which is often used in discussing the initial value formulation of general relativity.
		Alcubierre interpreted his "warp bubble" in terms of a contraction of "space" ahead of the bubble and an expansion behind.
	www.zamandayolculuk.com /cetinbal/warproblemx.htm (1466 words)

	Warp drive (Star Trek) - Wikipedia, the free encyclopedia
		Hyperdrive and jump drive are alternative methods of FTL travel commonly used in fiction.
		The concept of using spacial warping as a means of propulsion has been the subject of theoretical treatment by some physicists (such as Miguel Alcubierre, see Alcubierre drive), although no concrete technological approach has ever been proposed, nor is there any known way of inducing the effect described by Alcubierre.
		The best known such, known as the Alcubierre drive, has the amusing feature that its terminology is in accord with Trek jargon: "warp factors" measure the warping of space (or rather spacetime), not actual speed.
	en.wikipedia.org /wiki/Warp_drive (2734 words)

	Analog -- The Micro-Warp Drive
		This improvement on the Alcubierre warp drive was devised by general relativity theorist Chris Van Den Broeck of the Catholic University of Leuven in Belgium.
		Until 1994 a "warp drive" was one of the myths of science fiction, a rubber-science concept used principally to permit space opera heroes to flit from one star system to another at faster-than-light speeds, moving the plot forward in the process.
		Alcubierre constructed a "metric," a mathematical specification of the curvature of space-time that had all the characteristics of an SF warp drive including the capability for faster-than-light travel.
	www.analogsf.com /0002/av0002.html (2045 words)

	Future Space Drives (Site not responding. Last check: 2007-09-17)
		In the case of the Alcubierre warp drive, this moving section of spacetime is created by expanding spacetime behind the ship (analogous to where the sidewalk emerges from underneath the floor), and by contracting spacetime in front of the ship (analogous to where the sidewalk goes back into the floor).
		A "space drive" can be defined as an idealized form of propulsion where the fundamental properties of matter and spacetime are used to create propulsive forces anywhere in space without having to carry and expel a reaction mass.
		Before any of these space drives can become reality, a method must be discovered where a vehicle can create and control an external asymmetric force on itself without expelling a reaction mass and the method must satisfy conservation laws in the process.
	www.usc.edu /dept/LAS/english/courses/dilligan/projectsSp2000/spacetravel2/drives.htm (1385 words)

	Alcubierre drive
		But since Alcubierre published his results in an article entitled, "The warp drive: hyper-fast travel within general relativity," the physicists are getting better at this stellar chess game.
		If chess were played, say, on a sheet of rubber matting, with the moves possible for all chesspieces changing as the rubber sheet itself warped under a knight's or king's weight, one might get a sense of the challenges presented just to understand the rules of the game.
		To understand clearly the proposition, the Alcubierre warp drive rides a bubble on space time itself, a ripple built up by pulling in regions in front and expelling them in back--a kind of 'push-me, pull-me' approach to interstellar travel.
	www.zamandayolculuk.com /cetinbal/warpDrivesx.htm (880 words)

	Warp field
		In 1994, the Mexican physicist Miguel Alcubierre proposed in the Journal of Classical and Quantum Gravity a method of stretching space in a wave which would in theory cause the fabric of space ahead of a spacecraft to contract and the space behind it to expand.
		Thus, the Alcubierre drive does not contradict the conventional claim that relativity forbids a slower-than-light object to accelerate to faster-than-light speeds.
		Alcubierre drive theory is also mentioned in Orbiter, a graphic novel by Warren Ellis.
	www.link-ex.net /wiki_en/?title=Warp_field (2377 words)

	Warp drive - Memory Alpha, the Star Trek Wiki
		It does this by generating warp fields to form a subspace bubble that envelops the starship, distorting the local spacetime continuum and moving the starship at velocities that exceed the speed of light.
		The Vulcans (and, by extension, the Romulans) had warp drive in the 3rd century AD (Earth calendar), although the technology was lost during that planet's civil war, and was not reacquired until several centuries later.
		The development of the warp drive is recognized by the United Federation of Planets as the marker of an advanced society.
	memory-alpha.org /en/wiki/Warp_drive (1632 words)

	6.07: Electrosphere
		A physicist named Miguel Alcubierre recently published a well-received paper showing that warp drive - a way to manipulate the fabric of space-time and move faster than the speed of light - may actually be possible within the limits of general relativity.
		Alcubierre had set out to determine whether the concept of faster-than-light travel was feasible within the constraints of general relativity.
		Warp drive and wormholes require so much of it that when the droll and erudite Lawrence Krauss presented his paper at the BPP conference, he ridiculed such schemes as "the most inefficient way to fly." Such energies may be theoretically possible, Krauss claims, but they will be forever beyond human reach.
	www.wired.com /wired/archive/6.07/es_warp_pr.html (5300 words)

	Reference.com/Encyclopedia/Breakthrough Propulsion Physics Program
		The pitch drive is a diametric drive which uses the principle of a disjoint field (as in the disjunction drive) to eliminate the need for the field to be generated on the spacecraft itself.
		The bias drive is a pitch drive that functions by altering the gravitational constant G in front of and behind the craft.
		The Alcubierre drive, also called the warp drive is a proposal by the physicist Miguel Alcubierre.
	www.reference.com /browse/wiki/Breakthrough_Propulsion_Physics_Program (506 words)

	The Alcubierre Warp Drive - UFO Evidence
		Alcubierre's warp is constructed of hyperbolic tangent functions which create a very peculiar distortion of space at the edges of the flat-space volume.
		Thus, the situation for the Alcubierre drive is similar to that of stable wormholes: they are solutions to the equations of general relativity, but one would need "exotic matter" with negative mass-energy to actually produce them, and we have none at the moment.
		In the case of the` Alcubierre drive, this would probably require either externally moving the warp generating mechanism at near lightspeed velocities or embedding one warp within the flat-space region of another.
	www.ufoevidence.org /documents/doc1088.htm (1950 words)

	Marcelo B. Ribeiro's Page on "Warp Drive Theory"
		Until recently, warp drive was only associated with science fiction, but in 1994 Miguel Alcubierre presented a paper which theoretically described a physical mechanism where a spaceship could be propelled by a method similar to what is described in science fiction books.
		The most interesting aspect about Alcubierre's method was the fact that it was entirely based on known physics, on the theory of general relativity, and his proposal included a warp metric.
		Alcubierre's paper can be considered a scientific landmark in the sense that it effectively opened the way for discussing warp drive propulsion in physical terms, since from that moment on warp drive was no longer only a fiction, but also became a scientific issue.
	omnis.if.ufrj.br /~mbr/warp (868 words)

	M Theory Visionists - The Importance of Tipping Light Cones
		Alcubierre suggests that it might be possible to exploit this phenomenon to travel from one star to another faster than the speed of light.
		The reason is that light also travels in spacetime, and is carried along just as the spaceship is. The light beam is still traveling at the speed of light, relative to the spaceship, which itself is not accelerating relative to the spacetime in its immediate vicinity.
		Although Alcubierre's warp drive does not engender any causal paradoxes, one might still be concerned for a space traveler's welfare.
	wc0.worldcrossing.com /WebX?14@161.rUbzbRD0w7y.0@.1dde934e/61 (1158 words)

	UFO Area: SpaceTime Hypersurfing (Site not responding. Last check: 2007-09-17)
		In some future history, 1994 may be remembered as the year that the warp drive was first conceived to be a physical possibility.
		In the May issue of Classical and Quantum Gravity, Miguel Alcubierre, a physicist at the University of Wales describes a space-travel scenario that bears an uncanny resemblance to the warp drive of science fiction.
		The warp drive envisioned by Alcubierre is made possible by the subleties of Einstein's general theory of relativity.
	www.ufoarea.com /physics_cosmology_spacethyper.html (1020 words)

	Warp Technology Possible
		Alcubierre, claims to have found a loop-hole in Einstein's General Theory of Relativity, that allows for this kind of faster than light travel.
		According to Alcubierre's theory, it would be possible to generate a distortion in this "space-time continuum"--a space warp, using something called "exotic matter", both in front of and behind an object, that would propel it faster than light.
		This makes many dismiss Alcubierre's theory as nothing more than an interesting mathematical abstraction, (and certainly it is not by any means absolute proof that FTL travel is possible--let alone a blueprint for a starship).
	www.seds.org /nodes/NODEv4n3-5.html (780 words)

	BBC News \| Sci/Tech \| Warp drive possible
		The analysis of the concept of a warp drive by Chris Van Den Broeck of the Catholic University in Leuven, Belgium means that building a starship Enterprise is a little closer.
		Alcubierre said that it was possible to imagine how a warp drive would work by distorting the fabric of space.
		Alcubierre's idea was a good one, but his work seemed to suggest that building a warp bubble would be impossible in practice.
	news.bbc.co.uk /1/hi/sci/tech/364496.stm (653 words)

	warpdrive
		When one defines G=c=1, the velocity given can be equal to that of light (with G being the gravitational constant and c the velocity of light).
		Alcubierre defined the velocity of the warp bubble to be
		Therefore the Alcubierre Warp Drive can be imagined as special case geometry which brings a point in space to an observer as well as pushing an observer from their point of origin.
	da_theoretical1.tripod.com /alcmath/alcwarp.htm (560 words)

	Warp Drive and Horizons
		Warp Drive: Phase II This page is a continuation of the general ideas behind the physics of warp drive.
		The current scientific understanding of the Warp Drive is critically flawed, for example presently there are two distinct classes of warp drive being the Alcubierre Warp Drive [1] and the Krasnikov Tube [2] (see section I).
		The Alcubierre Warp Drive, may one day be the most realistic model for the warp drive as our understanding of gravitation increases, but at present this is not the case.
	members.tripod.com /da_theoretical1/horizons.html (985 words)

	SETI, the Velocity-of-Light Limitation, and the Alcubierre Warp Drive - UFO Evidence
		As shown recently by Alcubierre, however, rejection of the concept of hyperfast (superluminal) travel is not justified when one takes into account the possibility of engineered dynamic space-times within the context of general relativity.
		(4) Specifically, Alcubierre showed by example that by distorting the local space-time metric in the region of a spaceship in a certain prescribed way, it would be possible to achieve motion faster than the speed of light as seen by observers outside the disturbed region, without violating the local velocity-of-light constraint within the region.
		A detailed examination of the Alcubierre warp drive example within the TH µ-type framework is in preparation (to be published).
	www.ufoevidence.org /documents/doc1087.htm (1282 words)

	Reduced Energy Warp Drive -ESAA Collaboration (Site not responding. Last check: 2007-09-17)
		A free discussion forum was established in late December 2000 by Fernando Loup in honor of Miguel Alcubierre's work on the warp drive spacetime.
		Previous research work into the energy requirements of the warp drive focused on [global] remote frames, so Waite began to investigate the local energy requirements of the warp drive spacetime within the [local] ship's frame, this is where the story of our warp drive begins.
		However, it is somewhat easy to consider N=2 for a "hyper drive" spacetime, in our discussion this would describe a five-dimensional Anti de-Sitter spacetime, and without experimental results this may also be considered a mathematical trick (in which the "warp bubble" can be interpreted to have velocity that is 100 times that of light).
	www.members.tripod.com /da_theoretical1/lwh/ESAAwarp.html (1246 words)

	The Alcubierre drive (or "warp drive") - China History Forum, chinese history forum
		The Alcubierre drive is a theoretically sound hypothetical form of FTL or faster-than-light travel based on the principles of Einstein's General Theory of Relativity.
		The space in front of the "bubble" in which the starship is situated in is compressed while space behind the "bubble" is stretched, propelling the starship at faster-than-light speeds relative to a distant background observer at rest towards the destination even though the local speed of the starship is zero.
		Venturing a 3D image for the Alcubierre field: this is similar to the spaceship somehow pushing a big positive mass in front of it, and dragging an equivalent amount of negative mass behind.
	www.chinahistoryforum.com /index.php?showtopic=11375&mode=linearplus (2907 words)

	UNIVERSITY OF SOUTH DAKOTA
		A warp drive is a drive that functions on the principal of warping (or bending) spacetime to move an object.
		For an Alcubierre warp drive, the spacetime behind the object is given a negative curvature--resulting from negative mass, while the spacetime in front of the object is given a positive curvature--as caused by normal mass.
		To achieve warp drive, we only need to be able to control the curvature of spacetime, while the use of wormholes entails the ability to control at least two singularities and the ability to control which singularities connect to each other.
	www.usd.edu /phys/courses/phys300/gallery/intravel.htm (3181 words)

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