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排名前10位的原因,你永远也不会回到过去

根据爱因斯坦,旅行到未来,我们必须接近光速。 To travel into the past, we must surpass the speed of light.

对于时间旅行目前的纪录保持者是谢尔盖·克里卡列夫。 He has traveled about 337 million miles in orbit at some 17,450 mph – reaching a grand total of 0.02 seconds into the future. This means that from now on, he takes a step two hundredths of a second before you see him take it. Future time-travel is possible, as you’ll see explained.

但没有人走过了过去。 No one will do so unless we break the light barrier, as the following proofs will show you.


10

该引导悖论


Timberland的6英寸,拉链Earthkeepers-引导-ON-草

The term gets its name from Robert Heinlein’s short story “By His Bootstraps.” The phrase “pull yourself up by your bootstraps” refers to a self-sustaining process that requires no external stimulus to exist.



选择历史是时间旅行和中心对改变历史的前提下,一个流行的概念,无论是有意或无意,在旅途中通过了回去。 One counter to this is the claim that any change a time traveler makes to history is precisely what was always supposed to happen (see #3).



但是,这个反驳并没有解决矛盾的一个方面是简单的事实,经过时间的任何物体移动本身正常老化。 A person cannot travel faster than light in order to remain forever young; he may return to Earth after 10 years while Earth has aged 1,000, but he is still 10 years older, and eventually will die. The same goes for inanimate objects. Say you misplace your Oscar acceptance speech, so you get in your time machine and travel back 30 minutes to a time when you still know where the sheet of paper is, retrieve it, and return to the future in the nick of time to deliver it for your “Lincoln” performance. This is #3 on this list. 



但是到了一点:穿越时空的任何物体移动,为行,不再是印象本身在历史的时间。 After 100 million years, that sheet of paper has worn to dust, as has the traveler. But the show must go on, and the Oscar goes to the same person, who now accepts it without the speech, because it no longer exists outside history to return to him in the future.



现在让我们考虑的行驶通过历史回信息本身的概念。 Say you invent the time machine and use it to travel back 1,000 years. You share the knowledge of time travel with the people of that time, and they use it to invent the time machine. 1,000 years later, you invent the time machine, go back in time, and so on. Now we have a problem: since there cannot be more than one origin of something, the invention of time travel effectively has none, and this application is just as undefinable as dividing by zero.



9

弱宇宙审查假说


2012-07-10  Sc04

Stephen Hawking has spent his career working with black holes, and most of what we know about them is based on his work. The surface of a black hole is the event horizon, and once any object crosses this and enters the hole, it no longer exists in our spacetime continuum. It is drawn by extreme gravity into an infinitely thin strand of energy called a singularity.



霍金的工作理论是,只有一个黑洞可以创建一个奇点的能量了不起。 The weak cosmic censorship hypothesis asserts that there can be no singularity unhidden by a black hole, and thus, no singularity can ever be observed. The singularity is a major talking point of cosmology, because one theory of black holes paints them as gravitational pulls so strong that they impart faster-than-light speed to any object entering them. The singularity is the engine of a black hole’s gravity.



如果宇宙飞船想打破挡光板,它只需要穿过一个黑洞,和从另一侧出现仍将以这个速度——即启动飞船过去光速所以它可以在过去某个时候返回地球。



但没有任何物体能在黑洞的奇点中幸存下来。在这里,物质实际上可能被毁灭,这显然违反了质量守恒定律。因此,直到被证明存在奇点黑洞外,这种方法的旅行回到过去是不可能的。



8

该时序保护猜想


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这个是由霍金本人,和有很多数学没有数据。简而言之,该猜想要求不存在封闭的时间型曲线。CTC是任何物体通过四维时空时的闭合路径;如果路径对象又回到起点,据说是封闭的道路。



目前还没有数学理论能够预测ctc是否存在。如果他们的存在被证明,霍金的推测显然是错误的,穿越到过去可能是可能的,很可能是通过下一个条目。如果ctc不存在,那么这个猜想是正确的,和“历史学家整个宇宙中受到保护,”霍金说。



我们发现ctc是否存在的最直接的机会在于量子引力,它是数学的一个分支,致力于将宇宙的所有四种力组合成一个单一的蓝图,可以在宏观和亚原子尺度上描述所有的物理定律。这四种力包括:弱力,它使原子核周围的电子保持在轨道上,引发恒星中的氢聚变,并导致所有亚原子粒子的放射性衰变;把质子和中子结合成原子核的强大力量;电磁学;和重力。广义相对论调和了除电磁学以外的一切;量子引力,使用了一种不同的方法,调和了除了引力之外的一切。直到完全探索,量子引力ctc只能猜测,在他们的缺席,旅行到过去不能做。



7

虫洞逆反物理定律


虫洞的图形

所有我们对时间旅行的理解是基于我们所知道的宇宙的物理性质和交互。我们已经设计了一个数学分支,目前从物理学中分离出来,在微观尺度上描述物理定律,我们称之为量子物理学。这一分支有力地论证了爱因斯坦-罗森桥的存在,它是以两位对我们的理解贡献最大的科学家的名字命名的。

它们通常被称为虫洞,它们是撕裂时空结构的洞。如果我们可以利用它们,两点之间的最短距离将不再是一条直线,而是零,这是在原点和终点刺穿时空,就像在纸上戳洞一样;这样一来,时空就被有效地折叠起来,直到两个点重叠,旅行者从A点经过B点,时空就会展开到原来的状态。没有物理运动发生,但目的地可能是已知宇宙的另一端,和宇宙飞船没有走近,也超过了光速,只是传送。



这似乎允许通过完全避免光速回到过去的可能性,但它没有考虑到虫洞里发生了什么。物理学没有任何概念,除了说物理定律在虫洞里不像我们所知道的那样存在,或者根本不存在。如果我们试图理解穿越虫洞在我们的物理条件,那么我们不是在解决问题,和还没有离开广场。



6

从未来没有游客


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从数学让我们短暂的喘息。包括斯蒂芬·霍金(Stephen Hawking)在内的数百位高等数学学界人士坚信的一个理论是,我们已经有了可验证的证据,证明不可能有比光速还快的旅行:至少就我们所知,目前没有来自未来的人在我们身边走动。为了达到这个目的,会议已经安排好了,出席会议的有学者和普通的老科幻迷,他们坐在那里讨论这个主题,同时等待来自未来的访客出现在会议上。我们的想法是,在未来,人们对这些会议的了解就像我们对二战的了解一样;对我们来说,这是历史。如果时间旅行会成为现实,旅行者应该相当回到等待的人现在和证明。



到目前为止,当然,这并没有发生,因为我们这里演讲的整个未来从现在直到时间的尽头,应该有相当多的游客从许多点在未来出现在许多点在他们的过去。一个有趣的批评是,“为什么世界上有人想要访问我们的时代?”1939年9月1日是有道理的,但是今天呢?如果他们要警告我们什么,会是什么呢?他们会返回一些杰出的哲学如何影响真正的世界和平?

吗

想象一下:你可以去过去你喜欢的任何地方旅行。你想看什么?90% or more of prospective travelers would like to see if Jesus Christ really existed. But would you take it upon yourself to return to now and avert the imminent war between Israel and Hamas? No one has yet.

双生子佯谬


Twinparadox

这个悖论更恰当的处理未来的旅行。其中包括两个刚出生的同卵双胞胎,一个留在地球上,另一个去最近的恒星比邻星(Proxima Centauri),距离地球4光年。如果宇宙飞船以80%的光速飞行,有趣的是,这似乎更现实,往返将需要10年。这意味着地球的双胞胎将是10岁的时候他的哥哥回报。



但在飞船上,宇航员们观察到半人马座Promixa和地球也随着飞船移动,这导致A点和B点的距离缩短到2.4光年,而不是4光年。每段旅程将用2.4光年除以光速,80%的光速,历时3年单程,6个来回。因此,在相同的相对时间内,船上的双胞胎将会老化6年。这么多不是逻辑上是不可能的。



不可能的是,双胞胎中的一个以101%或超过光速的速度移动。至少根据我们的理解,这将导致他回到过去,不再存在,也就是从船上消失,不再回到他在地球上的兄弟那里。

4

E = MC平方


爱因斯坦E Mc2Formula

历史上最著名的方程的数学描述能量和质量之间的关系。1942年,它被认为是一种强大的新武器。爱因斯坦不知道它可以被用来构建一个更大、更好的炸弹,而哭当恩里科·费米和罗伯特·奥本海默解释发生了什么在橡树岭,田纳西州。



除了解释任何大小的物质中包含多少能量外,它还提供了一种探索,探索当物质运动得更快时,会发生什么。物体运动得越快,就需要更多的能量来维持它的运动。一个物体如果接近光速,它接近无限的质量,因此需要无限大的能量继续推动它向前。



这并不妨碍未来的旅行,因为一个物体所要做的就是接近光障。当你走进厨房去拿啤酒的时候,你接近它。你所走过的通往未来的路程微不足道。但从技术上讲,你获得的质量同样微不足道。所需要的能量推动一个大对象,像一个宇宙飞船,在未来任何有意义的距离,意义与我们的参照系,将大于或等于当前v的能源大犬座,我们所知道的最大的明星。



但是要打破光的屏障会让旅行者回到过去,而这需要无限的能量,然后比无限更大的能量。这是不可能实现的目标。



3

时空因果循环


祖父悖论

这是一个悖论,处理一个特定的场景:第一的发明时间机器。这个发明家回到过去,努力让他的祖父和祖母相爱,却意外地杀死了他的祖父(见第二条)。现在,将来绝望的存在,他和未来的祖母和父亲睡自己的父亲,从而使自己在未来,穿越时间和父亲父亲了。



这个悖论是不合逻辑的,因为它描述的是未来的结果先于过去的原因发生。假设你回到大爆炸之前,以某种方式引起了大爆炸,从而创造了宇宙。就命运而言,这一切的发生是为了让你在135亿年后发明时间机器,然后回到宇宙中去创造时间机器。它从根本上是麻木不仁的。



2

时间悖论


熔化的闹钟

This is essentially the negative version of #3, and is also called the Grandfather Paradox. Traveling into the past must be logically impossible because it would enable you to go back in time and kill yourself. But if you die, how will you travel into the past from the future to kill yourself? Critics, especially science fiction fans, are quick to point out that our understanding of mathematics expands every day thanks to people like Newton, Einstein, Hawking, and Michio Kaku, and with it comes an expanded understanding of the logic involved in time travel scenarios.



目前最好的计数器时间悖论是多元宇宙,它描述了在你要跟点,在你的一生无限数量做的事情无限数量无限多。 You may be stabbed in a bar fight at 100 years old in another Universe, but die of cancer as a child in this one. Imagine a Universe without Listverse. Our current understandings of quantum mechanics and quantum physics lends strong credence to the possibility that the Multiverse is a reality. It would negate the temporal paradox, and several others, allowing you a future after you have killed yourself. But there is still no fully formed theory of the Multiverse’s existence, and until there is, this paradox stands.



1

没有统一场论


弦理论

Frankly, all the previous entries are based more in terms of logic than in pure mathematics, precisely we can only surmise everything related to time travel according to our very superficial comprehension of it. Albert Einstein’s life work centered on what we now call Relativity. He postulated two theories of it, but the next step, an infinitely more important one, is to unify the General Theory of Relativity with electromagnetism. Einstein died working on this, and today’s eggheads have taken only baby steps forward. The “highest” form of mathematics to date is called “M Theory,” which is not even fully described yet. It’s practically a religion to mathematicians, because so little is understood about it that some don’t believe in it.



它确定了11个维度的宇宙,不只是4,它的冠军希望,它可以团结的5不同的是它之前弦理论,并采取了可能是保留超出只有一步:所有的物理性质和法律的统一 4 forces of the Universe. M Theory seeks a common ground between General Relativity and Quantum Gravity with the goal of combining all 4. To do so is to take a mathematical look at how the Universe appeared, and how it acted, when it was still an infinitely small point packing all the matter and energy that exist in it today. To comprehend such physics would enable a mathematical comprehension of how to manipulate spacetime itself and pre-vert to a time in the future or revert to a time in the past. Until someone unifies all 4 forces into a single physical quantity with a value for each point in spacetime, we aren’t going any-when.