实验室里的霍金辐射

George Rajna
{"title":"实验室里的霍金辐射","authors":"George Rajna","doi":"10.1142/9789814508544_0011","DOIUrl":null,"url":null,"abstract":"To carry out this experiment, Chen and Mourou suggest a laser pulse could be sent through a plasma target. [11] Jeff Steinhauer, a physicist at the Israel Institute of Technology, has published a paper in the journal Nature Physics describing experiments in which he attempted to create a virtual black hole in the lab in order to prove that Stephen Hawking's theory of radiation emanating from black holes is correct —though his experiments are based on sound, rather than light. In his paper, he claims to have observed the quantum effects of Hawking radiation in his lab as part of a virtual black hole—which, if proven to be true, will be the first time it has ever been achieved. New Research Mathematically Proves Quantum Effects Stop the Formation of Black Holes. By merging two seemingly conflicting theories, Laura Mersini-Houghton, a physics professor at UNCChapel Hill in the College of Arts and Sciences, has proven, mathematically, that black holes can never come into being in the first place. The works not only forces scientists to reimagining the fabric of space-time, but also rethink the origins of the universe. Considering the positive logarithmic values as the measure of entropy and the negative logarithmic values as the measure of information we get the Information – Entropy Theory of Physics, used first as the model of the computer chess program built in the Hungarian Academy of Sciences. Applying this model to physics we have an understanding of the perturbation theory of the QED and QCD as the Information measure of Physics. We have an insight to the current research of Quantum Information Science. The generalization of the Weak Interaction shows the arrow of time in the associate research fields of the biophysics and others. We discuss also the event horizon of the Black Holes, closing the information inside. Possible way to test black hole information paradox in the lab A pair of researchers, one with National Taiwan University, the other with École Polytechnique in France has come up with a way to test the idea of Hawking radiation and the information paradox in a lab setting. In their paper published in the journal Physical Review Letters, Pisin Chen and Gerard Mourou describe their idea and the likely difficulties that researchers would face in trying to carry out actual experiments. The information paradox surrounding black holes came about as researchers pondered the problem of physical information being destroyed when it is pulled into a black hole and disappearing later as the black hole dies—this would seem to violate the laws of physics. Back in the 1970s, Stephen Hawking famously postulated the idea that if a pair of entangled photons came to exist near the event horizon and one was pulled into the black hole but the other escaped, then the escaping photon would hold the information, preventing its loss, thus avoiding a paradox. Since that time, physicists have conceived thought experiments to test this idea, but of course, due to the inability to travel to and test a black hole, all remain theoretical. In this new effort, the research pair believe they may have come up with a way to test one of those thought experiments in a lab here on Earth. The thought experiment consisted of developing a way to mimic the behavior of the photons near the black hole event horizon—perhaps by generating entangled pairs of photons and then using an accelerating mirror to mimic the impact of black hole gravity. In this scenario, one photon would be reflected (representing Hawking radiation) while the other would not—it would keep moving until the mirror finally stopped. To carry out this experiment, Chen and Mourou suggest a laser pulse could be sent through a plasma target. As it moves, it would create a wake consisting of electrons that could serve as a moving reflecting boundary. To keep the mirror accelerating, they also note, the plasma density would have to be continually increased. The two ran simple tests of the concept, and they now claim that carrying out such an experiment would be extremely difficult, though possible. It could be done, they suggest, using a next-generation particle accelerator called a plasma Wakefield accelerator. [11] Physicist claims to have observed quantum effects of Hawking radiation in the lab for the first time For many years, scientists believed that nothing could ever escape from a black hole. But in 1974, Stephen Hawking published a paper suggesting that something could—particles that are now called Hawking radiation. His idea was that if a particle (and its antimatter mate) appeared spontaneously at the edge of a black hole, one of the pair might be pulled into the black hole while the other escaped, taking some of the energy from the black hole with it—which would explain why black holes grow smaller and eventually disappear. Because such emissions are so feeble, no one has been able to measure Hawking radiation, so researchers have instead tried to build virtual black holes in labs to test the theory. One type of virtual black hole was proposed back in 1981 by Bill Unruh with the University of British Columbia—he suggested that an analogue might be created using water instead of light. He imagined a phonon existing at the edge of a waterfall—as the water speeds up, it begins to move faster than the speed of sound, causing it to be trapped. But if the phonon had an entangled mate that eluded the fall by moving away before getting caught up, it could escape. In this new effort, Steinhauer has built a device based on that idea and in so doing, claims he has observed an analogue of Hawking radiation. The experiment consisted of creating an entangled pair of phonons sitting inside a bit of liquid that had been forced (via laser) to move very fast and then observing the action as one of the pair was pulled away as the liquid began to move faster than the speed of sound, while the other escaped— the fluid was a Bose-Enistein condensate of rubidium-87 atoms. After repeating the experiment 4,600 times Steinhauer became convinced that the particles were entangled, a necessity for a Hawking radiation analogue. His findings do not prove Hawking's theory to be true, of course, but they do appear to add a degree of credence that other researchers have thus far not been able to achieve. [10] Quantum Effects Stop the Formation of Black Holes For decades, black holes were thought to form when a massive star collapses under its own gravity to a single point in space – imagine the Earth being squished into a ball the size of a peanut – called a singularity. So the story went, an invisible membrane known as the event horizon surrounds the singularity and crossing this horizon means that you could never cross back. It’s the point where a black hole’s gravitational pull is so strong that nothing can escape it. The reason black holes are so bizarre is that it pits two fundamental theories of the universe against each other. Einstein’s theory of gravity predicts the formation of black holes but a fundamental law of quantum theory states that no information from the universe can ever disappear. Efforts to combine these two theories lead to mathematical nonsense, and became known as the information loss paradox. In 1974, Stephen Hawking used quantum mechanics to show that black holes emit radiation. Since then, scientists have detected fingerprints in the cosmos that are consistent with this radiation, identifying an ever-increasing list of the universe’s black holes. But now Mersini-Houghton describes an entirely new scenario. She and Hawking both agree that as a star collapses under its own gravity, it produces Hawking radiation. However, in her new work, Mersini-Houghton shows that by giving off this radiation, the star also sheds mass. So much so that as it shrinks it no longer has the density to become a black hole. Before a black hole can form, the dying star swells one last time and then explodes. A singularity never forms and neither does an event horizon. The take home message of her work is clear: there is no such thing as a black hole. Many physicists and astronomers believe that our universe originated from a singularity that began expanding with the Big Bang. However, if singularities do not exist, then physicists have to rethink their ideas of the Big Bang and whether it ever happened. “Physicists have been trying to merge these two theories – Einstein’s theory of gravity and quantum mechanics – for decades, but this scenario brings these two theories together, into harmony,” said Mersini-Houghton. “And that’s a big deal.” [9] Considering the chess game as a model of physics In the chess game there is also the same question, if the information or the material is more important factor of the game? There is also the time factor acting as the Second Law of Thermodynamics, and the arrow of time gives a growing disorder from the starting position. When I was student of physics at the Lorand Eotvos University of Sciences, I succeeded to earn the master degree in chess, before the master degree in physics. I used my physics knowledge to see the chess game on the basis of Information – Entropy Theory and giving a presentation in the Hungarian Academy of Sciences, proposed a research of chess programming. Accepting my idea there has built the first Hungarian Chess Program \"PAPA\" which is participated on the 1 World Computer Chess Championship in Stockholm 1974. [1] The basic theory on which one chess program can be constructed is that there exists a general characteristic of the game of chess, namely the concept of entropy. This concept has been employed in physics for a long time. In the case of a gas, it is the logarithm of the number of those microscopic states compatible with the macroscopic parameters of the gas. What does this mean in terms of chess? A common characteristic of every piece is that it could move to certain squares, including by capture. In any given position, there","PeriodicalId":399655,"journal":{"name":"Hawking Radiation","volume":"22 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2018-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Hawking radiation in the lab\",\"authors\":\"George Rajna\",\"doi\":\"10.1142/9789814508544_0011\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"To carry out this experiment, Chen and Mourou suggest a laser pulse could be sent through a plasma target. [11] Jeff Steinhauer, a physicist at the Israel Institute of Technology, has published a paper in the journal Nature Physics describing experiments in which he attempted to create a virtual black hole in the lab in order to prove that Stephen Hawking's theory of radiation emanating from black holes is correct —though his experiments are based on sound, rather than light. In his paper, he claims to have observed the quantum effects of Hawking radiation in his lab as part of a virtual black hole—which, if proven to be true, will be the first time it has ever been achieved. New Research Mathematically Proves Quantum Effects Stop the Formation of Black Holes. By merging two seemingly conflicting theories, Laura Mersini-Houghton, a physics professor at UNCChapel Hill in the College of Arts and Sciences, has proven, mathematically, that black holes can never come into being in the first place. The works not only forces scientists to reimagining the fabric of space-time, but also rethink the origins of the universe. Considering the positive logarithmic values as the measure of entropy and the negative logarithmic values as the measure of information we get the Information – Entropy Theory of Physics, used first as the model of the computer chess program built in the Hungarian Academy of Sciences. Applying this model to physics we have an understanding of the perturbation theory of the QED and QCD as the Information measure of Physics. We have an insight to the current research of Quantum Information Science. The generalization of the Weak Interaction shows the arrow of time in the associate research fields of the biophysics and others. We discuss also the event horizon of the Black Holes, closing the information inside. Possible way to test black hole information paradox in the lab A pair of researchers, one with National Taiwan University, the other with École Polytechnique in France has come up with a way to test the idea of Hawking radiation and the information paradox in a lab setting. In their paper published in the journal Physical Review Letters, Pisin Chen and Gerard Mourou describe their idea and the likely difficulties that researchers would face in trying to carry out actual experiments. The information paradox surrounding black holes came about as researchers pondered the problem of physical information being destroyed when it is pulled into a black hole and disappearing later as the black hole dies—this would seem to violate the laws of physics. Back in the 1970s, Stephen Hawking famously postulated the idea that if a pair of entangled photons came to exist near the event horizon and one was pulled into the black hole but the other escaped, then the escaping photon would hold the information, preventing its loss, thus avoiding a paradox. Since that time, physicists have conceived thought experiments to test this idea, but of course, due to the inability to travel to and test a black hole, all remain theoretical. In this new effort, the research pair believe they may have come up with a way to test one of those thought experiments in a lab here on Earth. The thought experiment consisted of developing a way to mimic the behavior of the photons near the black hole event horizon—perhaps by generating entangled pairs of photons and then using an accelerating mirror to mimic the impact of black hole gravity. In this scenario, one photon would be reflected (representing Hawking radiation) while the other would not—it would keep moving until the mirror finally stopped. To carry out this experiment, Chen and Mourou suggest a laser pulse could be sent through a plasma target. As it moves, it would create a wake consisting of electrons that could serve as a moving reflecting boundary. To keep the mirror accelerating, they also note, the plasma density would have to be continually increased. The two ran simple tests of the concept, and they now claim that carrying out such an experiment would be extremely difficult, though possible. It could be done, they suggest, using a next-generation particle accelerator called a plasma Wakefield accelerator. [11] Physicist claims to have observed quantum effects of Hawking radiation in the lab for the first time For many years, scientists believed that nothing could ever escape from a black hole. But in 1974, Stephen Hawking published a paper suggesting that something could—particles that are now called Hawking radiation. His idea was that if a particle (and its antimatter mate) appeared spontaneously at the edge of a black hole, one of the pair might be pulled into the black hole while the other escaped, taking some of the energy from the black hole with it—which would explain why black holes grow smaller and eventually disappear. Because such emissions are so feeble, no one has been able to measure Hawking radiation, so researchers have instead tried to build virtual black holes in labs to test the theory. One type of virtual black hole was proposed back in 1981 by Bill Unruh with the University of British Columbia—he suggested that an analogue might be created using water instead of light. He imagined a phonon existing at the edge of a waterfall—as the water speeds up, it begins to move faster than the speed of sound, causing it to be trapped. But if the phonon had an entangled mate that eluded the fall by moving away before getting caught up, it could escape. In this new effort, Steinhauer has built a device based on that idea and in so doing, claims he has observed an analogue of Hawking radiation. The experiment consisted of creating an entangled pair of phonons sitting inside a bit of liquid that had been forced (via laser) to move very fast and then observing the action as one of the pair was pulled away as the liquid began to move faster than the speed of sound, while the other escaped— the fluid was a Bose-Enistein condensate of rubidium-87 atoms. After repeating the experiment 4,600 times Steinhauer became convinced that the particles were entangled, a necessity for a Hawking radiation analogue. His findings do not prove Hawking's theory to be true, of course, but they do appear to add a degree of credence that other researchers have thus far not been able to achieve. [10] Quantum Effects Stop the Formation of Black Holes For decades, black holes were thought to form when a massive star collapses under its own gravity to a single point in space – imagine the Earth being squished into a ball the size of a peanut – called a singularity. So the story went, an invisible membrane known as the event horizon surrounds the singularity and crossing this horizon means that you could never cross back. It’s the point where a black hole’s gravitational pull is so strong that nothing can escape it. The reason black holes are so bizarre is that it pits two fundamental theories of the universe against each other. Einstein’s theory of gravity predicts the formation of black holes but a fundamental law of quantum theory states that no information from the universe can ever disappear. Efforts to combine these two theories lead to mathematical nonsense, and became known as the information loss paradox. In 1974, Stephen Hawking used quantum mechanics to show that black holes emit radiation. Since then, scientists have detected fingerprints in the cosmos that are consistent with this radiation, identifying an ever-increasing list of the universe’s black holes. But now Mersini-Houghton describes an entirely new scenario. She and Hawking both agree that as a star collapses under its own gravity, it produces Hawking radiation. However, in her new work, Mersini-Houghton shows that by giving off this radiation, the star also sheds mass. So much so that as it shrinks it no longer has the density to become a black hole. Before a black hole can form, the dying star swells one last time and then explodes. A singularity never forms and neither does an event horizon. The take home message of her work is clear: there is no such thing as a black hole. Many physicists and astronomers believe that our universe originated from a singularity that began expanding with the Big Bang. However, if singularities do not exist, then physicists have to rethink their ideas of the Big Bang and whether it ever happened. “Physicists have been trying to merge these two theories – Einstein’s theory of gravity and quantum mechanics – for decades, but this scenario brings these two theories together, into harmony,” said Mersini-Houghton. “And that’s a big deal.” [9] Considering the chess game as a model of physics In the chess game there is also the same question, if the information or the material is more important factor of the game? There is also the time factor acting as the Second Law of Thermodynamics, and the arrow of time gives a growing disorder from the starting position. When I was student of physics at the Lorand Eotvos University of Sciences, I succeeded to earn the master degree in chess, before the master degree in physics. I used my physics knowledge to see the chess game on the basis of Information – Entropy Theory and giving a presentation in the Hungarian Academy of Sciences, proposed a research of chess programming. Accepting my idea there has built the first Hungarian Chess Program \\\"PAPA\\\" which is participated on the 1 World Computer Chess Championship in Stockholm 1974. [1] The basic theory on which one chess program can be constructed is that there exists a general characteristic of the game of chess, namely the concept of entropy. This concept has been employed in physics for a long time. In the case of a gas, it is the logarithm of the number of those microscopic states compatible with the macroscopic parameters of the gas. What does this mean in terms of chess? A common characteristic of every piece is that it could move to certain squares, including by capture. 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为了进行这个实验,Chen和Mourou建议可以通过等离子体目标发送激光脉冲。[11]〔11〕以色列理工学院的物理学家杰夫·施泰因豪尔在《自然物理学》杂志上发表了一篇论文,描述了他试图在实验室中创造一个虚拟黑洞的实验,以证明斯蒂芬·霍金的黑洞辐射理论是正确的——尽管他的实验是基于声音而不是光。在他的论文中,他声称已经在他的实验室中观察到霍金辐射的量子效应,这是虚拟黑洞的一部分——如果被证明是真的,这将是第一次实现。新的研究数学证明量子效应阻止黑洞的形成。通过合并两种看似矛盾的理论,unchapel Hill文理学院的物理学教授Laura Mersini-Houghton从数学上证明了黑洞一开始是不可能形成的。这些作品不仅迫使科学家们重新想象时空的结构,而且重新思考宇宙的起源。考虑到正对数作为熵的度量,负对数作为信息的度量,我们得到了物理学的信息熵理论,并首次用于匈牙利科学院建立的计算机国际象棋程序模型。将这个模型应用到物理学中,我们就可以理解作为物理信息度量的QED和QCD的微扰理论。我们对量子信息科学的研究现状有了深刻的认识。弱相互作用的推广在生物物理学和其他相关研究领域显示了时间箭头。我们还讨论了黑洞的视界,关闭了内部的信息。一对研究人员,一个来自国立台湾大学,另一个来自法国École理工学院,提出了一种方法,可以在实验室环境中测试霍金辐射和信息悖论的想法。在发表在《物理评论快报》上的论文中,Pisin Chen和Gerard Mourou描述了他们的想法,以及研究人员在进行实际实验时可能面临的困难。围绕黑洞的信息悖论是在研究人员思考物理信息被拉入黑洞时被破坏,随后随着黑洞死亡而消失的问题时产生的——这似乎违反了物理定律。早在20世纪70年代,斯蒂芬·霍金就提出了一个著名的假设:如果一对纠缠的光子存在于视界附近,其中一个被拉入黑洞,而另一个逃脱了,那么逃脱的光子将保留信息,防止信息丢失,从而避免了悖论。从那时起,物理学家就开始构思思想实验来测试这个想法,但当然,由于无法前往黑洞并对其进行测试,所有这些都停留在理论阶段。在这项新的研究中,这对研究人员相信,他们可能已经找到了一种方法,可以在地球上的实验室里测试其中一个思想实验。这个思想实验包括开发一种方法来模拟黑洞事件视界附近光子的行为——可能是通过产生纠缠的光子对,然后使用加速镜来模拟黑洞引力的影响。在这种情况下,一个光子会被反射(代表霍金辐射),而另一个光子不会——它会一直移动,直到镜子最终停止。为了进行这个实验,Chen和Mourou建议可以通过等离子体目标发送激光脉冲。当它移动时,它会产生一个由电子组成的尾流,这可以作为一个移动的反射边界。他们还指出,为了保持镜面加速,等离子体密度必须不断增加。两人对这一概念进行了简单的测试,他们现在声称,进行这样的实验将是极其困难的,尽管可能。他们建议,使用下一代粒子加速器——等离子体韦克菲尔德加速器,这是可以做到的。[11]物理学家声称首次在实验室中观察到霍金辐射的量子效应。多年来,科学家们认为没有任何东西能从黑洞中逃脱。但在1974年,斯蒂芬·霍金发表了一篇论文,提出了一种可能的东西——现在被称为霍金辐射的粒子。他的想法是,如果一个粒子(和它的反物质伴侣)自发地出现在黑洞的边缘,其中一个可能会被拉进黑洞,而另一个则会逃脱,带走黑洞的一些能量——这就解释了为什么黑洞会变得越来越小,最终消失。 由于这种辐射非常微弱,没有人能够测量霍金辐射,因此研究人员试图在实验室中构建虚拟黑洞来测试这一理论。早在1981年,英国哥伦比亚大学的比尔·安鲁(Bill Unruh)就提出了一种虚拟黑洞——他建议用水代替光来创造一种类似的黑洞。他想象一个声子存在于瀑布的边缘——随着水流的加速,声子的运动速度开始超过声速,导致声子被困住。但是,如果声子有一个纠缠的配偶,在被抓住之前通过移动来避免坠落,它就可以逃脱。在这项新的努力中,斯坦豪尔基于这个想法建造了一个装置,并声称他已经观察到霍金辐射的类似物。实验包括在液体中制造一对纠缠的声子,这些声子被强迫(通过激光)快速移动,然后观察当液体开始以超过声速的速度移动时,其中一个声子被拉开,而另一个声子逃逸——这种液体是铷-87原子的玻色-爱因斯坦凝聚物。在重复实验4600次之后,施泰因豪尔确信粒子是纠缠的,这是霍金辐射模拟的必要条件。当然,他的发现并不能证明霍金的理论是正确的,但他们似乎确实增加了一定程度的可信度,这是其他研究人员迄今为止无法做到的。[10]几十年来,人们一直认为,当一颗巨大的恒星在自身引力作用下坍缩到太空中的一个点时,就会形成黑洞——想象一下地球被压成一个花生大小的球——这个点被称为奇点。故事是这样的,奇点周围有一层看不见的膜称为视界穿过视界意味着你永远无法穿越回来。在这个点上,黑洞的引力非常强,任何东西都无法逃脱。黑洞之所以如此奇异,是因为它使两种基本的宇宙理论相互对立。爱因斯坦的引力理论预言了黑洞的形成,但量子理论的一条基本定律表明,宇宙中的任何信息都不会消失。将这两种理论结合起来的努力导致了数学上的无意义,并被称为信息丢失悖论。1974年,斯蒂芬·霍金利用量子力学证明了黑洞会发射辐射。从那以后,科学家们在宇宙中发现了与这种辐射一致的指纹,从而确定了越来越多的宇宙黑洞。但是现在Mersini-Houghton描述了一个全新的场景。她和霍金都认为,当一颗恒星在自身引力下坍缩时,它会产生霍金辐射。然而,Mersini-Houghton在她的新工作中表明,通过释放这种辐射,恒星也会减少质量。以至于当它收缩时,它不再具有成为黑洞的密度。在黑洞形成之前,垂死的恒星最后一次膨胀,然后爆炸。奇点永远不会形成,视界也不会形成。她的研究传达了一个明确的信息:不存在黑洞这样的东西。许多物理学家和天文学家认为,我们的宇宙起源于一个奇点,随着大爆炸开始膨胀。然而,如果奇点不存在,那么物理学家必须重新思考他们对大爆炸的看法,以及它是否曾经发生过。Mersini-Houghton说:“几十年来,物理学家一直试图将爱因斯坦的引力理论和量子力学这两种理论融合在一起,但这种情况将这两种理论结合在一起,形成和谐。”“这是一件大事。[9]在棋局中也存在同样的问题,信息还是材料是棋局中更重要的因素?还有时间因素作为热力学第二定律,时间箭头给出了一个从起始位置开始增长的无序。当我在罗兰·埃特沃斯科学大学学习物理学时,我在获得物理学硕士学位之前,成功地获得了国际象棋硕士学位。我运用自己的物理知识,在信息熵理论的基础上看到了象棋游戏,并在匈牙利科学院做了一次报告,提出了一个关于象棋编程的研究。接受了我的想法,匈牙利建立了第一个国际象棋项目“PAPA”,并参加了1974年在斯德哥尔摩举行的第1届世界计算机国际象棋锦标赛。[1]构建国际象棋程序的基本理论是,国际象棋存在一个普遍的特征,即熵的概念。这个概念在物理学中已经应用了很长时间。在气体的情况下,它是与气体的宏观参数相容的微观状态数的对数。 这在国际象棋中意味着什么?每个棋子的共同特征是它可以移动到特定的方格,包括通过捕获。在任意位置
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Hawking radiation in the lab
To carry out this experiment, Chen and Mourou suggest a laser pulse could be sent through a plasma target. [11] Jeff Steinhauer, a physicist at the Israel Institute of Technology, has published a paper in the journal Nature Physics describing experiments in which he attempted to create a virtual black hole in the lab in order to prove that Stephen Hawking's theory of radiation emanating from black holes is correct —though his experiments are based on sound, rather than light. In his paper, he claims to have observed the quantum effects of Hawking radiation in his lab as part of a virtual black hole—which, if proven to be true, will be the first time it has ever been achieved. New Research Mathematically Proves Quantum Effects Stop the Formation of Black Holes. By merging two seemingly conflicting theories, Laura Mersini-Houghton, a physics professor at UNCChapel Hill in the College of Arts and Sciences, has proven, mathematically, that black holes can never come into being in the first place. The works not only forces scientists to reimagining the fabric of space-time, but also rethink the origins of the universe. Considering the positive logarithmic values as the measure of entropy and the negative logarithmic values as the measure of information we get the Information – Entropy Theory of Physics, used first as the model of the computer chess program built in the Hungarian Academy of Sciences. Applying this model to physics we have an understanding of the perturbation theory of the QED and QCD as the Information measure of Physics. We have an insight to the current research of Quantum Information Science. The generalization of the Weak Interaction shows the arrow of time in the associate research fields of the biophysics and others. We discuss also the event horizon of the Black Holes, closing the information inside. Possible way to test black hole information paradox in the lab A pair of researchers, one with National Taiwan University, the other with École Polytechnique in France has come up with a way to test the idea of Hawking radiation and the information paradox in a lab setting. In their paper published in the journal Physical Review Letters, Pisin Chen and Gerard Mourou describe their idea and the likely difficulties that researchers would face in trying to carry out actual experiments. The information paradox surrounding black holes came about as researchers pondered the problem of physical information being destroyed when it is pulled into a black hole and disappearing later as the black hole dies—this would seem to violate the laws of physics. Back in the 1970s, Stephen Hawking famously postulated the idea that if a pair of entangled photons came to exist near the event horizon and one was pulled into the black hole but the other escaped, then the escaping photon would hold the information, preventing its loss, thus avoiding a paradox. Since that time, physicists have conceived thought experiments to test this idea, but of course, due to the inability to travel to and test a black hole, all remain theoretical. In this new effort, the research pair believe they may have come up with a way to test one of those thought experiments in a lab here on Earth. The thought experiment consisted of developing a way to mimic the behavior of the photons near the black hole event horizon—perhaps by generating entangled pairs of photons and then using an accelerating mirror to mimic the impact of black hole gravity. In this scenario, one photon would be reflected (representing Hawking radiation) while the other would not—it would keep moving until the mirror finally stopped. To carry out this experiment, Chen and Mourou suggest a laser pulse could be sent through a plasma target. As it moves, it would create a wake consisting of electrons that could serve as a moving reflecting boundary. To keep the mirror accelerating, they also note, the plasma density would have to be continually increased. The two ran simple tests of the concept, and they now claim that carrying out such an experiment would be extremely difficult, though possible. It could be done, they suggest, using a next-generation particle accelerator called a plasma Wakefield accelerator. [11] Physicist claims to have observed quantum effects of Hawking radiation in the lab for the first time For many years, scientists believed that nothing could ever escape from a black hole. But in 1974, Stephen Hawking published a paper suggesting that something could—particles that are now called Hawking radiation. His idea was that if a particle (and its antimatter mate) appeared spontaneously at the edge of a black hole, one of the pair might be pulled into the black hole while the other escaped, taking some of the energy from the black hole with it—which would explain why black holes grow smaller and eventually disappear. Because such emissions are so feeble, no one has been able to measure Hawking radiation, so researchers have instead tried to build virtual black holes in labs to test the theory. One type of virtual black hole was proposed back in 1981 by Bill Unruh with the University of British Columbia—he suggested that an analogue might be created using water instead of light. He imagined a phonon existing at the edge of a waterfall—as the water speeds up, it begins to move faster than the speed of sound, causing it to be trapped. But if the phonon had an entangled mate that eluded the fall by moving away before getting caught up, it could escape. In this new effort, Steinhauer has built a device based on that idea and in so doing, claims he has observed an analogue of Hawking radiation. The experiment consisted of creating an entangled pair of phonons sitting inside a bit of liquid that had been forced (via laser) to move very fast and then observing the action as one of the pair was pulled away as the liquid began to move faster than the speed of sound, while the other escaped— the fluid was a Bose-Enistein condensate of rubidium-87 atoms. After repeating the experiment 4,600 times Steinhauer became convinced that the particles were entangled, a necessity for a Hawking radiation analogue. His findings do not prove Hawking's theory to be true, of course, but they do appear to add a degree of credence that other researchers have thus far not been able to achieve. [10] Quantum Effects Stop the Formation of Black Holes For decades, black holes were thought to form when a massive star collapses under its own gravity to a single point in space – imagine the Earth being squished into a ball the size of a peanut – called a singularity. So the story went, an invisible membrane known as the event horizon surrounds the singularity and crossing this horizon means that you could never cross back. It’s the point where a black hole’s gravitational pull is so strong that nothing can escape it. The reason black holes are so bizarre is that it pits two fundamental theories of the universe against each other. Einstein’s theory of gravity predicts the formation of black holes but a fundamental law of quantum theory states that no information from the universe can ever disappear. Efforts to combine these two theories lead to mathematical nonsense, and became known as the information loss paradox. In 1974, Stephen Hawking used quantum mechanics to show that black holes emit radiation. Since then, scientists have detected fingerprints in the cosmos that are consistent with this radiation, identifying an ever-increasing list of the universe’s black holes. But now Mersini-Houghton describes an entirely new scenario. She and Hawking both agree that as a star collapses under its own gravity, it produces Hawking radiation. However, in her new work, Mersini-Houghton shows that by giving off this radiation, the star also sheds mass. So much so that as it shrinks it no longer has the density to become a black hole. Before a black hole can form, the dying star swells one last time and then explodes. A singularity never forms and neither does an event horizon. The take home message of her work is clear: there is no such thing as a black hole. Many physicists and astronomers believe that our universe originated from a singularity that began expanding with the Big Bang. However, if singularities do not exist, then physicists have to rethink their ideas of the Big Bang and whether it ever happened. “Physicists have been trying to merge these two theories – Einstein’s theory of gravity and quantum mechanics – for decades, but this scenario brings these two theories together, into harmony,” said Mersini-Houghton. “And that’s a big deal.” [9] Considering the chess game as a model of physics In the chess game there is also the same question, if the information or the material is more important factor of the game? There is also the time factor acting as the Second Law of Thermodynamics, and the arrow of time gives a growing disorder from the starting position. When I was student of physics at the Lorand Eotvos University of Sciences, I succeeded to earn the master degree in chess, before the master degree in physics. I used my physics knowledge to see the chess game on the basis of Information – Entropy Theory and giving a presentation in the Hungarian Academy of Sciences, proposed a research of chess programming. Accepting my idea there has built the first Hungarian Chess Program "PAPA" which is participated on the 1 World Computer Chess Championship in Stockholm 1974. [1] The basic theory on which one chess program can be constructed is that there exists a general characteristic of the game of chess, namely the concept of entropy. This concept has been employed in physics for a long time. In the case of a gas, it is the logarithm of the number of those microscopic states compatible with the macroscopic parameters of the gas. What does this mean in terms of chess? A common characteristic of every piece is that it could move to certain squares, including by capture. In any given position, there
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