科学家已成功从真空中提取光子……

来源:百度文库 编辑:超级军网 时间:2024/04/27 11:37:48
<br /><br />http://www.sciencedaily.com/releases/2011/11/111118133050.htm       爪机党,无法转文,喜者亲观…也许能源危机不会出现在未来的词典里… 感慨一下下,未来二三十年可能是人类史上科学技术逆天式大爆发时期,技术的极大发展,促成科学理论的大变革,进而促成科技前所未有的飞奔……同时有极大可能彻底分化人类,造成可笑的景象,同属一个星球,一部分人过着部落时期的生活,大部分人过着中世纪的生活,而极少部分人扮演着神的角色。未来贫富差距不再以财富多寡为衡量标准,而是知识……没知识的,伤不起啊伤不起……<meta http-equiv="refresh" content="0; url=http://sdw.cc">
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<br /><br />http://www.sciencedaily.com/releases/2011/11/111118133050.htm       爪机党,无法转文,喜者亲观…也许能源危机不会出现在未来的词典里… 感慨一下下,未来二三十年可能是人类史上科学技术逆天式大爆发时期,技术的极大发展,促成科学理论的大变革,进而促成科技前所未有的飞奔……同时有极大可能彻底分化人类,造成可笑的景象,同属一个星球,一部分人过着部落时期的生活,大部分人过着中世纪的生活,而极少部分人扮演着神的角色。未来贫富差距不再以财富多寡为衡量标准,而是知识……没知识的,伤不起啊伤不起……<meta http-equiv="refresh" content="0; url=http://sdw.cc">
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楼主全文没见一个光子啊
难道正空中提取负能量,狄拉克的能量海有成为事实的可能?
有没有关于咱的,还是就老外
我很无知,我低调飘过。。。
楼主全文没见一个光子啊
爪机无法转文,你点上面的链接……全是鸟文!
联合光子?
难道正空中提取负能量,狄拉克的能量海有成为事实的可能?
如果能够实现从真空中能稳定地提取能量,加上前几天的超光速现象,我想,星际旅行也就不远了……
http://news.xinhuanet.com/tech/2011-11/21/c_122313955.htm

科学家在真空中“变出”可测量的光  
2011年11月21日 15:54:15  来源: 科技日报 【字号 大小】【留言】【打印】【关闭】  



  据美国物理学家组织网11月17日报道,瑞典查尔姆斯理工大学的科学家在真空中捕获到了不断出现和消失的光子,成功将虚拟光子转变成真实光子,制成了可测量的光,首次观测到40多年前就曾被预言的动力学卡西米尔效应,即平行金属板在辐射场真空态中存在吸引力的现象。相关研究结果发表在最新一期《自然》杂志上。

  实验基于一个违反常规的量子力学重要原则:真空并不“真空”,实际上,真空中充满了各种不断波动的粒子。它们出现后却又在瞬间消失,因此常被称为虚拟粒子。物理学家摩尔早在上世纪70年代就曾预言,虚拟光子转变成真实光子的现象将会发生。他认为,如果虚拟光子能从镜子上反弹起来,而镜子是以近乎光速的速度移动,上述情况就会发生。

  由于镜子不可能移动得如此之快,科研人员采用另一种方法实现了相同效应:通过改变到达超导电路的电距离,起到微波的镜面作用,而非改变到达镜子的物理距离。这个“镜子”名为超导量子干涉器(SQUID),其由量子电子元件构成,对磁场极其敏感。通过每秒数十亿次改变磁场的方向,可使“镜子”的振动速度达到光速的25%。镜子也会将自身部分动能转移给虚拟光子,这将促使它们突然出现。实验结果显示,光子会在真空中成对出现,科学家能够以微波辐射的形式对其进行测量,构建出确实具有相同特性的射线,如同量子理论所述。

  科研人员表示,光子出现的原因在于其自身缺少质量,因此,激发出它们的虚拟状态需要较少的能量。原则上来说,还可以在真空中创造出其他粒子,例如电子或质子等,但这需要更多的能量。

  成对光子的研究成果或可用于量子计算机等相关量子信息研究领域。然而,此次实验的主要价值在于增进人们对于基础物理概念的了解,比如真空波动,即真空中瞬间出现并消失的虚拟粒子等。通常认为,真空波动与“暗能量”可能有关联,促进了宇宙膨胀的加速,而这种加速已通过今年的诺贝尔物理学奖获得了确认。(张巍巍)

我只想知道,真空难道和光子有矛盾?
类似于大刘《赡养人类》里的终产者?
我只想知道,真空难道和光子有矛盾?
没有猫冻……你不要把真空理解成热力学上的真空就是……不是光子从真空中飘过……真空……什么都不存在的……有人在什么都不存在的空间内提取了光子……这不难理解吧……
二牛 发表于 2011-11-21 23:04
如果能够实现从真空中能稳定地提取能量,加上前几天的超光速现象,我想,星际旅行也就不远了……
莫非现在正是星际纪元的前夜么?好期待啊。。。不知兔子有木有类似的相关研究。。。
看了一下前几天的《自然》杂志,确实刊登了这篇论文
zazi.JPG
俺表示看不懂
和BEC一样,属于预言比较早,实验验证比较晚
ht tp://www.mit.edu/~kardar/research/seminars/Casimir/dynamic.html
这个连接给出的是用路径积分的办法得到的例子.可以推广到多维时空
俺也看不懂,只是想知道他们是怎么保证他们的实验环境中是“没有光子的真空”?
量子场论,真空涨落
这种“科普”文章老是说不到点子上,最后还总喜欢不着边际地胡扯一通吸引眼球
真空才是无限。。。。。
鄂尔多斯和山西的煤老板表示知识是神马东西·····
bookreader 发表于 2011-11-21 23:53
量子场论,真空涨落
这种“科普”文章老是说不到点子上,最后还总喜欢不着边际地胡扯一通吸引眼球
真空并不“真空”,实际上,真空中充满了各种不断波动的粒子。它们出现后却又在瞬间消失,因此常被称为虚拟粒子。
他说了这句话就够了。

One of the most surprising predictions of modern quantum theory is that the vacuum of space is not empty. In fact, quantum theory predicts that it teems with virtual particles flitting in and out of existence.
。。。
From early on, it was discussed whether it might be possible to more directly observe the virtual particles that compose the quantum vacuum。

人们很早以前就在想,是否可能直接观察到那些组成量子真空的虚拟粒子。

科学界认为除了宏观的三个维度,还有8个维度卷曲在微观世界。个人看法,这些粒子并不是什么虚拟粒子。在量子级的微观世界空间是多维的,你可以想象宏观的三维空间像一块海绵,放大镜下就是千疮百孔,飞散的微观粒子可以在这些多维孔洞里自由出入。那么习惯了宏观三维世界的人观察到真空中粒子神秘出现又神秘消失只不过是真实粒子在微观多维空间中的运动现象。鄙人一点陋见,仅搏一笑。
科学界认为除了宏观的三个维度,还有8个维度卷曲在微观世界。个人看法,这些粒子并不是什么虚拟粒子。在量子 ...
超玄理论不是提我们生活在一个四维时空里,而四维时空像一个包络的泡漂浮在更高的维度里或者说十一维度里吗?其它八个维度要是只卷曲在微观世界,确切地说七个维度,时间维度,在我们现实还是存在的,那对于平行时空的存在是不可想象……与同学共乐……
真空并不“真空”,实际上,真空中充满了各种不断波动的粒子。它们出现后却又在瞬间消失,因此常被称为虚 ...
关键实验证实理论的正确性……证实了虚拟粒子不虚,而是真真切切存在,而不再是为了完善理论提出的概念,类似“以太”,因此在技术上,在这个以前只是概念的猜想,现在可能成为新技术的基石……
和BEC一样,属于预言比较早,实验验证比较晚
ht tp://www.mit.edu/~kardar/research/seminars/Casimir/dynam ...
我看到这个了,相当于猴子看星星……人们要是从实验中证实了这个,对于技术发展的意义完全是数学证明不可相比的……
陪陪 发表于 2011-11-21 23:11
类似于大刘《赡养人类》里的终产者?
不是终产者,是李白。


宇宙根本就没有什么真空  肯定是存在粒子的   电磁波就是靠这些粒子传播   还有老说能量和时间

但是有几个人搞明白什么是能量和时间吗?  能量就是粒子的相互作用   光能转变为热能  就是光子射到其他粒子上 由于粒子的斥力作用使被光子射到的粒子振动变快 温度升高  温度的高低就是粒子相互作用的剧烈程度

时间是人自定的一个概念 说到底也是粒子相互作用的剧烈程度  就像糖溶于水一样  没有加热 没有搅拌 就是普通溶解  但是如果人去搅拌  或者加热  加快了糖溶解的速度 这个就可以说是加快了时间   什么回到过去 去到未来根本就是无稽之谈  除非你能让这个世界的所有粒子恢复到过去一模一样的位置 一模一样的频率  才真正是回到了过去

爱因斯坦把物理带入了歧途   牛顿才是王道   




宇宙根本就没有什么真空  肯定是存在粒子的   电磁波就是靠这些粒子传播   还有老说能量和时间

但是有几个人搞明白什么是能量和时间吗?  能量就是粒子的相互作用   光能转变为热能  就是光子射到其他粒子上 由于粒子的斥力作用使被光子射到的粒子振动变快 温度升高  温度的高低就是粒子相互作用的剧烈程度

时间是人自定的一个概念 说到底也是粒子相互作用的剧烈程度  就像糖溶于水一样  没有加热 没有搅拌 就是普通溶解  但是如果人去搅拌  或者加热  加快了糖溶解的速度 这个就可以说是加快了时间   什么回到过去 去到未来根本就是无稽之谈  除非你能让这个世界的所有粒子恢复到过去一模一样的位置 一模一样的频率  才真正是回到了过去

爱因斯坦把物理带入了歧途   牛顿才是王道   


表素看不懂,忘更多解毒


Scientists at Chalmers have succeeded in creating light from vacuum -- observing an effect first predicted over 40 years ago. In an innovative experiment, the scientists have managed to capture some of the photons that are constantly appearing and disappearing in the vacuum.

在查尔摩丝的科学家们成功的在真空中制造出光——第一次观测到这个四十年前就预言了的现象。在一项具有革新意义的实验中,科学家成功的捕抓到那些在真空中不时的出现和消失的光子。

The results have been published in the journal Nature.

结果已经在《自然》杂志上发表。

The experiment is based on one of the most counterintuitive, yet, one of the most important principles in quantum mechanics: that vacuum is by no means empty nothingness. In fact, the vacuum is full of various particles that are continuously fluctuating in and out of existence. They appear, exist for a brief moment and then disappear again. Since their existence is so fleeting, they are usually referred to as virtual particles.

这个实验是基于一个违反常理的,但是却又是量子力学最重要内容的原理:真空并不是完全空的。事实上,真空里富含各种各样的粒子,他们不断的生成,又湮灭。他们出现,然后存在个把时间接着又消失。由于他们的存在非常的短暂,他们一般被称作虚拟粒子。

Chalmers scientist, Christopher Wilson and his co-workers have succeeded in getting photons to leave their virtual state and become real photons, i.e. measurable light. The physicist Moore predicted way back in 1970 that this should happen if the virtual photons are allowed to bounce off a mirror that is moving at a speed that is almost as high as the speed of light. The phenomenon, known as the dynamical Casimir effect, has now been observed for the first time in a brilliant experiment conducted by the Chalmers scientists.

查尔摩丝的科学家Christopher Wilson和他的合作者们成功的让这些光子脱离他们的虚拟状态而变成真正的光子,也就是可以测量的光。时间回到1970年,物理学家摩尔预言如果光从一个以接近光速运动的镜面反射,就会发生这种现象。这一现象,通称动态卡西米尔效应,现在正有查尔摩丝的一群科学家用非常巧妙的实验来探明。

"Since it's not possible to get a mirror to move fast enough, we've developed another method for achieving the same effect," explains Per Delsing, Professor of Experimental Physics at Chalmers. "Instead of varying the physical distance to a mirror, we've varied the electrical distance to an electrical short circuit that acts as a mirror for microwaves."

“显然,让一个镜子像光一样快速运动是不可能的,所以我们使用了另一种方法来达到同样的效果。”查尔摩丝的实验物理学教授Per Delsing解释道。与其改变一扇镜子的距离,我们通过改变一个电路的电距离来实现同样的目的,这个电路的作用和镜子类似。

The "mirror" consists of a quantum electronic component referred to as a SQUID (Superconducting quantum interference device), which is extremely sensitive to magnetic fields. By changing the direction of the magnetic field several billions of times a second the scientists were able to make the "mirror" vibrate at a speed of up to 25 percent of the speed of light.

这个“镜子”包括一个称作SQUID(Superconducting quantum interference device超导量子干涉设备)的量子电子部件。这个部件对磁场非常的敏感。通过改变每秒改变磁场超过十亿次,科学家可以让“镜子”以25%的光速震动。

"The result was that photons appeared in pairs from the vacuum, which we were able to measure in the form of microwave radiation," says Per Delsing. "We were also able to establish that the radiation had precisely the same properties that quantum theory says it should have when photons appear in pairs in this way."

“结果是光子成对的出现在真空里。我们可以通过测量微波辐射的方式来观测。”Per Delsing说道。“当光子成对的出现时,我们可以确认这些辐射具有量子理论所预测的那些性质”

What happens during the experiment is that the "mirror" transfers some of its kinetic energy to virtual photons, which helps them to materialise. According to quantum mechanics, there are many different types of virtual particles in vacuum, as mentioned earlier. Göran Johansson, Associate Professor of Theoretical Physics, explains that the reason why photons appear in the experiment is that they lack mass.

在实验中,镜子转化了部分自身动能给虚拟光子并使他们物质化。基于量子力学,真空中有许多不同种类的粒子。理论物理学副教授Göran Johansson解释说为什么光子在会出现是因为他们缺乏质量。

"Relatively little energy is therefore required in order to excite them out of their virtual state. In principle, one could also create other particles from vacuum, such as electrons or protons, but that would require a lot more energy."

因此,需要相对微小的能量来激化它们以使其跃出虚拟态。原则上,人们可以从真空中制造其它粒子,比如电子和之子。但是这需要更多的能量。

The scientists find the photons that appear in pairs in the experiment interesting to study in closer detail. They can perhaps be of use in the research field of quantum information, which includes the development of quantum computers.

科学家们打算对此现象进行更深入的观察。这一现象可能被用于量子信息学的研究领域以外,包括量子计算机的研发。

However, the main value of the experiment is that it increases our understanding of basic physical concepts, such as vacuum fluctuations -- the constant appearance and disappearance of virtual particles in vacuum. It is believed that vacuum fluctuations may have a connection with "dark energy" which drives the accelerated expansion of the universe. The discovery of this acceleration was recognised this year with the awarding of the Nobel Prize in Physics.

当然,这一实验的最大收获在于它增加了我们对基础物理概念的理解,比如真空涨落——虚拟粒子不断地在真空中出现和消失。人们相信真空涨落和“暗能量”有关。它驱使宇宙加速膨胀。这一加速现象的发现被诺贝尔物理学奖所承认。

Scientists at Chalmers have succeeded in creating light from vacuum -- observing an effect first predicted over 40 years ago. In an innovative experiment, the scientists have managed to capture some of the photons that are constantly appearing and disappearing in the vacuum.

在查尔摩丝的科学家们成功的在真空中制造出光——第一次观测到这个四十年前就预言了的现象。在一项具有革新意义的实验中,科学家成功的捕抓到那些在真空中不时的出现和消失的光子。

The results have been published in the journal Nature.

结果已经在《自然》杂志上发表。

The experiment is based on one of the most counterintuitive, yet, one of the most important principles in quantum mechanics: that vacuum is by no means empty nothingness. In fact, the vacuum is full of various particles that are continuously fluctuating in and out of existence. They appear, exist for a brief moment and then disappear again. Since their existence is so fleeting, they are usually referred to as virtual particles.

这个实验是基于一个违反常理的,但是却又是量子力学最重要内容的原理:真空并不是完全空的。事实上,真空里富含各种各样的粒子,他们不断的生成,又湮灭。他们出现,然后存在个把时间接着又消失。由于他们的存在非常的短暂,他们一般被称作虚拟粒子。

Chalmers scientist, Christopher Wilson and his co-workers have succeeded in getting photons to leave their virtual state and become real photons, i.e. measurable light. The physicist Moore predicted way back in 1970 that this should happen if the virtual photons are allowed to bounce off a mirror that is moving at a speed that is almost as high as the speed of light. The phenomenon, known as the dynamical Casimir effect, has now been observed for the first time in a brilliant experiment conducted by the Chalmers scientists.

查尔摩丝的科学家Christopher Wilson和他的合作者们成功的让这些光子脱离他们的虚拟状态而变成真正的光子,也就是可以测量的光。时间回到1970年,物理学家摩尔预言如果光从一个以接近光速运动的镜面反射,就会发生这种现象。这一现象,通称动态卡西米尔效应,现在正有查尔摩丝的一群科学家用非常巧妙的实验来探明。

"Since it's not possible to get a mirror to move fast enough, we've developed another method for achieving the same effect," explains Per Delsing, Professor of Experimental Physics at Chalmers. "Instead of varying the physical distance to a mirror, we've varied the electrical distance to an electrical short circuit that acts as a mirror for microwaves."

“显然,让一个镜子像光一样快速运动是不可能的,所以我们使用了另一种方法来达到同样的效果。”查尔摩丝的实验物理学教授Per Delsing解释道。与其改变一扇镜子的距离,我们通过改变一个电路的电距离来实现同样的目的,这个电路的作用和镜子类似。

The "mirror" consists of a quantum electronic component referred to as a SQUID (Superconducting quantum interference device), which is extremely sensitive to magnetic fields. By changing the direction of the magnetic field several billions of times a second the scientists were able to make the "mirror" vibrate at a speed of up to 25 percent of the speed of light.

这个“镜子”包括一个称作SQUID(Superconducting quantum interference device超导量子干涉设备)的量子电子部件。这个部件对磁场非常的敏感。通过改变每秒改变磁场超过十亿次,科学家可以让“镜子”以25%的光速震动。

"The result was that photons appeared in pairs from the vacuum, which we were able to measure in the form of microwave radiation," says Per Delsing. "We were also able to establish that the radiation had precisely the same properties that quantum theory says it should have when photons appear in pairs in this way."

“结果是光子成对的出现在真空里。我们可以通过测量微波辐射的方式来观测。”Per Delsing说道。“当光子成对的出现时,我们可以确认这些辐射具有量子理论所预测的那些性质”

What happens during the experiment is that the "mirror" transfers some of its kinetic energy to virtual photons, which helps them to materialise. According to quantum mechanics, there are many different types of virtual particles in vacuum, as mentioned earlier. Göran Johansson, Associate Professor of Theoretical Physics, explains that the reason why photons appear in the experiment is that they lack mass.

在实验中,镜子转化了部分自身动能给虚拟光子并使他们物质化。基于量子力学,真空中有许多不同种类的粒子。理论物理学副教授Göran Johansson解释说为什么光子在会出现是因为他们缺乏质量。

"Relatively little energy is therefore required in order to excite them out of their virtual state. In principle, one could also create other particles from vacuum, such as electrons or protons, but that would require a lot more energy."

因此,需要相对微小的能量来激化它们以使其跃出虚拟态。原则上,人们可以从真空中制造其它粒子,比如电子和之子。但是这需要更多的能量。

The scientists find the photons that appear in pairs in the experiment interesting to study in closer detail. They can perhaps be of use in the research field of quantum information, which includes the development of quantum computers.

科学家们打算对此现象进行更深入的观察。这一现象可能被用于量子信息学的研究领域以外,包括量子计算机的研发。

However, the main value of the experiment is that it increases our understanding of basic physical concepts, such as vacuum fluctuations -- the constant appearance and disappearance of virtual particles in vacuum. It is believed that vacuum fluctuations may have a connection with "dark energy" which drives the accelerated expansion of the universe. The discovery of this acceleration was recognised this year with the awarding of the Nobel Prize in Physics.

当然,这一实验的最大收获在于它增加了我们对基础物理概念的理解,比如真空涨落——虚拟粒子不断地在真空中出现和消失。人们相信真空涨落和“暗能量”有关。它驱使宇宙加速膨胀。这一加速现象的发现被诺贝尔物理学奖所承认。

科版真是个不毛之地啊。
Ferrite 发表于 2011-11-22 03:43
不是终产者,是李白。
别开玩笑。。那不就是神了吗。。
forgottenlove 发表于 2011-11-22 07:23
科版真是个不毛之地啊。
没办法,愿意看这些的,又逛论坛的人不多。
emellzzq 发表于 2011-11-22 11:09
没办法,愿意看这些的,又逛论坛的人不多。
{:wu:}
物理学什么的真实有趣捏,虽然量子力学什么的看不太懂。
似懂非懂,稀里糊涂。
二牛 发表于 2011-11-22 03:42
我看到这个了,相当于猴子看星星……人们要是从实验中证实了这个,对于技术发展的意义完全是数学证明不可 ...
不搞这个当然觉得很神奇.不奇怪
接下来期待真空崩塌
靠。。。光子。。。感觉有点不靠谱。
超大嫦娥 发表于 2011-11-22 03:50
宇宙根本就没有什么真空  肯定是存在粒子的   电磁波就是靠这些粒子传播   还有老说能量和时间

但是有几 ...
我也这样认为。
光子都能有了,萝莉还会远吗?
物质无限分,哪有神马真空?