تفنگداران دستگیر شده امریکایی، در آبهای بین المللی رها شدند+تصاویر
به گزارش حوزه در بخشی از این اطلاعیه آمده است:در پی ورود غیر قانونی و غیر مجاز دو
فروند شناور رزمی امریکایی به آبهای سرزمینی جمهوری اسلامی ایران در خلیج
فارس و در حوالی جزیزه فارسی در عصر روز گذشته (سهشنبه مورخ 94/10/22 )
این شناورها پس از تمکین اخطار شناورهای رزمی نیروی دریایی سپاه متوقف و
سرنشینان آن که 9 تفنگدار مرد و یک تفنگدار زن بودند، دستگیر شدند. این اطلاعیه افزوده است:همانگونه که در اطلاعیههای قبلی تصریح شده بود در هنگام توقیف این دو شناور رزمی، ناوگروه هواپیمابر "ترومن" امریکا و ناوگروه هواپیمابر "شارل دو گل " فرانسه در آبهای بین المللی منطقه حضور داشتهاند و همزمان ناو گروه هواپیمابر امریکایی اقدام به تحرکات انفعالی و احساسی هوایی و دریایی نمود که با هوشمندی و مدیریت مقتدرانه نیروی دریایی سپاه کنترل و آرامش در منطقه تأمین شد.
در ادامه این اطلاعیه با بیان اینکه "در شناورهای امریکایی سلاحهای سبک و نیمه سنگین وجود داشته است" تصریح شده است: پس از انتقال و استقرار تفنگداران دستگیر شده در محل پایگاه نیروی دریایی سپاه، بررسیهای لازم پیرامون چرایی و چگونگی ورود غیر قانونی آنان آغاز گردید و همزمان مقامات سیاسی امریکا در تماسهای مکرر با مقامات سیاسی کشورمان با غیر عمدی خواندن اقدام شناورهای رزمی خود، آزادی تفنگداران امریکایی را در خواست کردند.
این اطلاعیه افزوده است: پس از بررسیهای فنی و عملیاتی در تعامل با مراجع ذیصلاح سیاسی و امنیت ملی کشور و مشخص شدن سهوی و غیر عمدی بودن ورود شناورهای رزمی امریکا به آبهای جمهوری اسلامی ایران و عذر خواهی آنها؛ تصمیم به رها سازی آنان گرفته شد.
این اطلاعیه با تأکید بر اینکه "امریکاییها متعهد شدند که دچار اشتباهات مجدد نشوند" آورده است: تفنگداران دریایی دستگیر شده لحظاتی قبل با نظارت شناورهای رزمی نیروی دریایی سپاه پاسداران انقلاب اسلامی در آبهای بین المللی رها شدند.
در پایان این اطلاعیه تأکید شده است رزمندگان غیور نیروی دریایی سپاه پاسداران انقلاب اسلامی به مانند گذشته در پهنای خلیج فارس و تنگه هرمز با اقتدار و صلابت از سیادت دریایی و مرزهای آبی جمهوری اسلامی ایران دفاع خواهند کرد.
How to Teleport Info Out of a Black Hole
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This artist's impression illustrates how high-speed jets from a supermassive black hole would look. Credit: ESA/Hubble, L. Calçada (ESO) |
Quantum teleportation of subatomic particles could be used to retrieve information from a black hole, a new algorithm suggests.
The information that can be extracted from this hypothetical black hole is quantum information, meaning that instead of existing in either a 0 or 1 state, like a classical bit, the data collected would exist as a superposition of all potential states.
"We've demonstrated concretely that it is possible, in principle, to retrieve some quantum information from a black hole," said study co-author Adam Jermyn, a doctoral candidate at the University of Cambridge in England. [The 9 Biggest Unsolved Mysteries in Physics]
But don't go tossing your computer into the nearest black hole just yet. The amount of information that can be retrieved is tiny — just one quantum bit, or qubit. What's more, getting that bit would likely mean sacrificing the possibility of retrieving other quantum information from the black hole, the researchers reported in October 2015 in the preprint journal arXiv.
Gravitational vacuum
Most people think that nothing can escape from black holes— compact, enormously dense celestial objects such as collapsed stars whose gargantuan gravitational field prevents light and matter from escaping. But it turns out that's not quite true — some information can be retrieved from the clutches of a black hole.
Though a person or even an atom cannot escape a black hole, physicists believe that the universe does not destroy information, which means that, in principle, information sucked into a black hole could be spit back out. (This requirement stems from the fact that most physicists believe the laws of physics should be applicable both backward and forward in time.)
In the 1970s, physicist Stephen Hawking predicted how this might work. Because quantum particles act like waves, their position is described as a probability range of all locations — including positions both inside and outside the black hole. Thus, it remains possible, though improbable, for some subatomic particles to use quantum tunneling to escape a black hole.
In this case of quantum tunneling, quantum radiation leaks from the edges of a black hole in a process dubbed "Hawking radiation." That radiation is thought to be incredibly dim — so dim, in fact, that it has never been detected, though most scientists are confident it's real. [Video: Black Holes Warping Space-Time]
Classical vs. quantum information
Scientists have long known that classical information can be eked from a black hole. For instance, if someone were to toss a particle into a black hole, before-and-after measurements of the black hole's mass could be used to calculate the lost particle's mass — considered "classical information," Jermyn said.
But things get trickier when the piece of data is a qubit because of the weird way quantum mechanics works. A qubit exists in multiple entangled states at once, but the very act of measuring the tiny particle's state forces the qubit to "choose" one state, which would then eliminate the other information it carried.
Jermyn and his colleagues tried to deduce one single piece of quantum information — the spin, or angular momentum direction, of a particle tossed into a black hole. (Classically, a black hole may have one angular momentum, but in reality, its angular momentum can be described using quantum mechanics as a superposition of multiple possibilities.)
Teleporting data
To do so, they relied on an algorithm that uses quantum teleportation in a black hole, or Hawking radiation. When someone tosses a particle into a black hole, Hawking radiation creates two new, ghostly particles in response: One of the phantom particles is consumed by the black hole, and the other escapes.
So, by looking at the state of the outgoing particle from the Hawking radiation, physicists could theoretically deduce information about the incoming particle.
"The trick is to do all this without 'looking,'" Jermyn told Live Science. If they directly measure the spin state of the outgoing Hawking radiation, they force it to choose a spin state, and they lose the quantum information it carries and, with it, the ability to deduce the original particle's spin state.
So instead, the algorithm took an indirect measurement of the spin of the black hole, the original infalling particle and the Hawking radiation that was swept in as well. The trick? They don't measure everything they could; the measurements only tell the researchers whether the angular momentum has changed or not, but not in which direction, Jermyn said.
These nonmeasurements "give you some information, but not so much that you lose all the quantum mechanical information in it," Jermyn told Live Science.
From the measurements, they could back-calculate the angular momentum spin orientation of the original qubit that fell in, showing how, in theory, someone could retrieve quantum information from a black hole.
Practical applications
The practical applications of the new method are limited, to say the least.
For one, "you can't accidentally throw [a qubit] in and then say 'whoops' and try to get it back; you have to have been planning to throw it in," Jermyn said. So, people who accidentally wiped their data by tossing it into a black hole would be out of luck, he added.
Their method also retrieves just one qubit of information, and it's likely that not much more could be retrieved even if the algorithm were developed further, Jermyn added.
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