c****t
发帖数: 19049 | 1 呈现出单光子不能旅行比光速更快，科学家证明时间旅行是不可能的。
香港的物理学家说，他们已经证明了的单光子，不能旅行比光速更快。
他们说，这表明，时间旅行是不可能的
香港的物理学家说，他们已经证明，单光子服从爱因斯坦的理论，没有什么能比光速旅
行更快 - 证明以外的科幻小说，时间旅行是不可能的。
香港大学的科学和技术都绳网领导的研究小组说，他们已经证明，单光子，或轻单位，
“遵守交通法的宇宙。”
“爱因斯坦声称，光速是宇宙的交通法，或用简单的语言，没有什么可行驶速度超过光
速，”大学在其网站上说。
经新闻：驱动发动机将前往比光还快
“杜教授的研究表明，一个单一的光子，光的基本量子，也遵守交通法的宇宙一样经典
的EM（电磁）波。”
提出时间旅行的可能性是10年前，当科学家们发现了超光速 - 或快于光 - 光脉冲在某
些特定的介质传播，团队说。
后来发现是一种视觉效果，但研究人员认为，它可能仍然是单光子可能超过光速。
，然而，都认为爱因斯坦是正确的，并决心通过测量单个光子的终极速度，没有这样做
之前结束辩论。
照片：5从电影的时间旅行方法
大学说：“这项研究表明，单光子也遵守车速限制为C，证实了爱因斯坦的因果关系，
效果不能发生之前，其原因，”。
“通过我们的研究结果显示，单光子不能旅行比光速更快，带来一个封闭的单个光子携
带的信息的真实速度的辩论，都表示，物理学助理教授。”
“我们的研究结果也将可能有潜在的应用，使科学家对量子信息的传输更好的画面。”
该小组的研究结果发表在美国的同行评议的科学期刊物理评论快报“。 | c****t
发帖数: 19049 | 2 THE GIST
Hong Kong physicists say they have proven a single photon cannot travel
faster than the speed of light.
This demonstrates that time travel is impossible, they say.
Hong Kong physicists say they have proved that a single photon obeys
Einstein's theory that nothing can travel faster than the speed of light --
demonstrating that outside science fiction, time travel is impossible.
The Hong Kong University of Science and Technology research team led by Du
Shengwang said they had proved that a single photon, or unit of light, "
obeys the traffic law of the universe."
"Einstein claimed that the speed of light was the traffic law of the
universe or in simple language, nothing can travel faster than light," the
university said on its website.
NEWS: Warp Drive Engine Would Travel Faster Than Light
"Professor Du's study demonstrates that a single photon, the fundamental
quanta of light, also obeys the traffic law of the universe just like
classical EM (electromagnetic) waves."
The possibility of time travel was raised 10 years ago when scientists
discovered superluminal -- or faster-than-light -- propagation of optical
pulses in some specific medium, the team said.
It was later found to be a visual effect, but researchers thought it might
still be possible for a single photon to exceed light speed.
Du, however, believed Einstein was right and determined to end the debate by
measuring the ultimate speed of a single photon, which had not been done
before.
PHOTOS: Top 5 Time Travel Methods From the Movies
"The study, which showed that single photons also obey the speed limit c,
confirms Einstein's causality; that is, an effect cannot occur before its
cause," the university said.
"By showing that single photons cannot travel faster than the speed of light
, our results bring a closure to the debate on the true speed of information
carried by a single photon," said Du, assistant professor of physics.
"Our findings will also likely have potential applications by giving
scientists a better picture on the transmission of quantum information."
The team's study was published in the U.S. peer-reviewed scientific journal
Physical Review Letters. | k*****a
发帖数: 7110 | 3 这个...
记得早先看过一个科普文章说，在限定条件下，有可能出现比光子快的...比如似乎在
某某介质中，某种粒子会比光在这种介质中的速度快...- -b
again,偶不是专业的，纯粹道听途说...
travel
-
【在 c****t 的大作中提到】
: THE GIST
: Hong Kong physicists say they have proven a single photon cannot travel
: faster than the speed of light.
: This demonstrates that time travel is impossible, they say.
: Hong Kong physicists say they have proved that a single photon obeys
: Einstein's theory that nothing can travel faster than the speed of light --
: demonstrating that outside science fiction, time travel is impossible.
: The Hong Kong University of Science and Technology research team led by Du
: Shengwang said they had proved that a single photon, or unit of light, "
: obeys the traffic law of the universe."
| c****t
发帖数: 19049 | 4 "The possibility of time travel was raised 10 years ago when scientists
discovered superluminal -- or faster-than-light -- propagation of optical
pulses in some specific medium, the team said.
It was later found to be a visual effect, but researchers thought it might
still be possible for a single photon to exceed light speed."
you didn't read it...
【在 k*****a 的大作中提到】
: 这个...
: 记得早先看过一个科普文章说，在限定条件下，有可能出现比光子快的...比如似乎在
: 某某介质中，某种粒子会比光在这种介质中的速度快...- -b
: again,偶不是专业的，纯粹道听途说...
:
: travel
: -
| k*****a
发帖数: 7110 | 5 看不懂...google翻译的也看不懂...泪飘...
似乎和偶说的那个不是一回事...偶说的那个粒子不是光子，印象中...那个超光速也没
有超过c，只是说某粒子比光子快罢了...
这个算是定义的分歧？光速是定义为光子的速度还是定义为c...- -b
【在 c****t 的大作中提到】
: "The possibility of time travel was raised 10 years ago when scientists
: discovered superluminal -- or faster-than-light -- propagation of optical
: pulses in some specific medium, the team said.
: It was later found to be a visual effect, but researchers thought it might
: still be possible for a single photon to exceed light speed."
: you didn't read it...
| k*****a
发帖数: 7110 | 6 偶说的是这个：http://baike.baidu.com/view/464020.htm
而文中香港教授引的是这个王力军实验：http://baike.baidu.com/view/24725.htm
【在 k*****a 的大作中提到】
: 看不懂...google翻译的也看不懂...泪飘...
: 似乎和偶说的那个不是一回事...偶说的那个粒子不是光子，印象中...那个超光速也没
: 有超过c，只是说某粒子比光子快罢了...
: 这个算是定义的分歧？光速是定义为光子的速度还是定义为c...- -b
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