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Their initial warp drive experiments are trying to generate an instance on the microscopic level so you would not see the phenomena with the naked eye.

Other researchers aime… At NASA Eagleworks, Dr. White and colleagues are looking to practically prove the concept of warp-drive by lab experiments. It only means that the actions required to change the metric and create the bubble must be taken beforehand by some observer whose forward A spaceship appropriately located with respect to the bubble trajectory could then choose to enter the bubble, rather like a passenger catching a passing trolley car, and thus make the superluminal journey ... as Krasnikov points out, causality considerations do not prevent the crew of a spaceship from arranging, by their own actions, to complete a The metric of this form has significant difficulties because all known warp-drive spacetime theories violate various Coule has argued that schemes, such as the one proposed by Alcubierre, are infeasible because matter placed An article by José Natário (2002) argues that crew members could not control, steer or stop the ship in its warp bubble because the ship could not send signals to the front of the bubble (the Horizon problem).A 2009 article by Carlos Barceló, Stefano Finazzi, and Stefano Liberati uses quantum theory to argue that the Alcubierre drive at faster-than-light velocities is impossible mostly because extremely high temperatures caused by The amount of negative energy required for such a propulsion is not yet known.
The expansion and contraction of space as measured by York time are now more of a secondary effect and can be considered equivalent to a pressure gradient of a moving sphere in a fluid. This is what is known as the "Alcubierre Metric". However, according to research,This corresponds to a negative toroidal energy density symmetric to the The symmetry in the energy distribution leads to the scenario in which the choice of positive The boost can roughly be seen as a scalar multiplier acting on an initial velocity leading to the actual warp-velocity: It is thus theoretically possible that the boost of a 3+1 spacetime model is a scalar correction factor for higher-dimensional geometric effects on our brane, leading the following analogies to Alcubierre's model: In 2012, a NASA laboratory announced that they had constructed an interferometer that they claim will detect the spatial distortions produced by the expanding and contracting spacetime of the Alcubierre metric. Brian Wang has been covering the warp theory work since Alcubierre published his work. The Alcubierre drive works like a physics version of a classic party trick.

In theory, a spacecraft inside this wave would be able to ride this "warp bubble" and achieve velocities beyond the speed of light.

The original Alcubierre work needed a Jupiter-mass of exotic material.

The work and attempts and experiments in 2014 had a gap between sensors … Only with specialist equipment designed for the experiments. New experimental setups have been proposed to boost sensitivity, and using the higher-dimensional yet still purely theoretical approach may increase any effect sufficiently to obtain significant results to prove or disprove the theory. Here one has a constant negative energy density..."Brendan McMonigal, Geraint F. Lewis, and Philip O'Byrne J. Gardiner, "Warp Drive - From Imagination to Reality", If a particle like an electron gains a high spacetime boost relative to an observer, it might actually leave the 3+1 brane (i.e.

In this particular model our space exists on a That means that light rays could have a spacelike appearance, an obvious parallel to the Alcubierre model. Although the metric proposed by Alcubierre is consistent with the Einstein field equations, construction of such a drive is not necessarily possible.

The scalar nature of the effect is an important clue when considering higher dimensions.

In layman's terms, the Alcubierre Drive achieves FTL travel by stretching the fabric of space-time in a wave, causing the space ahead of it to contract while the space behind it expands. This research is being carried out at the Advanced Propulsion Physics Laboratory at NASA’s Johnston Space Center. However, in the Alcubierre model the spacetime expansion boost is the driving phenomenon, whereas in the Chung–Freese model the off-brane bulk location U serves this purpose. The work has been described in Warp Field Mechanics 101, a NASA paper by Harold Sonny White. The concept, in other words, is consistent over time.