Charged dust solutions for the warp drive spacetime

Santos-Pereira, Osvaldo L.; Abreu, Éverton M. C.; Ribeiro, Marcelo B.

doi:10.1007/s10714-021-02799-y

Cited by 20 publications

(16 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This would distort space-time and provide antigravity. As shown in figure 2, the space ship in a wrap bubble, a massive particle in a spacetime distortion, compresses the space in front of it and stretches the space behind it to achieve global superluminal velocity, but at the same time it does not violate the laws of relativity due to local speed is subluminal [3]. Moreover, the wrap bubble is surrounded by flat spacetime, so tidal force and time delays do not affect the work of warp drive [7].…”

Section: Wrap Drivementioning

confidence: 99%

The Theoretical Basis and Feasibility of Time Travel

Du¹

2022

Advances in Social Science, Education and Humanities Research

View full text Add to dashboard Cite

Whether time travel can be achieved in reality is often a matter of debate, and although many scientists have proposed a number of theoretical ways in which it might be possible, their feasibility remains to be studied. This paper firstly contrasts the absolute spacetime view and relative spacetime view to reflect the understanding of time and other physical quantities in relativity. Subsequently, this paper mainly analyzes seven existing methods of time travel, and introduces them respectively from theoretical principles, related theorems, current development status and development limitations. On this basis, the current situation and prospects of the overall development of time travel are outlined. Besides, the main research method of this paper is to collect various theses related to time travel methods and research data published by some space agencies with integration and analysis as well. This information is sometimes an in-depth study of part of each method, and sometimes a negation of one. But they all help paper to have a more comprehensive understanding, and lead to a conclusion that time travel requires not only the correct theories but also available technology and energy to support the journey to operate and keep astronauts safe.

show abstract

Section: Wrap Drivementioning

confidence: 99%

The Theoretical Basis and Feasibility of Time Travel

Du¹

2022

Advances in Social Science, Education and Humanities Research

View full text Add to dashboard Cite

show abstract

“…( 42) represents the total energy contained inside a spatial region of ρ = ρ 0 = constant, i.e., a cylinder of radius ρ 0 and length 2L in Euclidean space. In order to evaluate only the gravitational energy, we need the components t µν given by (12). They read…”

Section: Static Observermentioning

confidence: 99%

“…Interestingly, in the latter case, an equation was obtained and that resembles the Burgers equation, which describes shock waves moving in a fluid. Latter, a perfect fluid and a charged dust were also considered as a source [11,12].…”

Section: Introductionmentioning

confidence: 99%

On the total energy conservation of the Alcubierre spacetime

Carneiro,

Ulhoa,

Maluf

et al. 2022

Preprint

View full text Add to dashboard Cite

In this article, we consider Alcubierre spacetime. This spacetime is an exact solution to Einstein equations and describes a gravitational bubble propagating with arbitrary global velocity. This setting allows motion at a speed greater than that of light. There are some known problems with this metric, e.g., the source's negative energy and the violation of the source's energy conservation when the bubble accelerates. We address these two issues within the realm of the Teleparallel Equivalent of General Relativity (TEGR). The energy conservation problem can be solved when considering the energy of the gravitational field itself. The total energy of the spacetime, gravitational plus source, is conserved even in accelerated motion. We explicitly show the dependence of energy and gravitational energy flux on the frame of reference, one adapted to a static observer and the other to a free-falling one in the same coordinate system. Addressing the problem of energy negativity of the source, we find that a static observer measures positive energy of the source, while an Eulerian observer measures a negative one. Thus, we surmise that negative energy may be a reference problem.

show abstract

“…One of the main focuses of this field is to solve the above theoretical puzzles, see for example [16][17][18][19][20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Obstacles from interstellar matter and distortion for warp drive travel

Bian¹,

Wang²,

Wang³

et al. 2022

Preprint

View full text Add to dashboard Cite

We investigate obstacles of superluminal "warp drive" travels from interactions with interstellar matter and from curvature effects. The effect of collision of interstellar dust particles and photons with the spacecraft will all lead to a pressure proportional to the apparent velocity of the spaceship v s . The force exerted on the spacecraft from the curvature effect has two non-trivial components. The radial and longitudinal components scales as v 2 s and v 4 s respectively. The above obstacles become increasingly important when the spaceship travels at high superluminal speeds.

show abstract

Charged dust solutions for the warp drive spacetime

Cited by 20 publications

References 14 publications

The Theoretical Basis and Feasibility of Time Travel

The Theoretical Basis and Feasibility of Time Travel

On the total energy conservation of the Alcubierre spacetime

Obstacles from interstellar matter and distortion for warp drive travel

Contact Info

Product

Resources

About