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http://www.cnn.com/2006/TECH/science/10/04/teleportation.reut/index.html
Ученые из Дании впервые телепортировали объект, состояший из тысяч миллиардов атомов. Ранее удавалось это сделать только для отдельных атомов.
Ученые из Дании впервые телепортировали объект, состояший из тысяч миллиардов атомов. Ранее удавалось это сделать только для отдельных атомов.
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no subject
Date: 2006-10-06 03:42 pm (UTC)From:я немного не пойму. что такое телепортация. обьект стерли в одном месте и перенесли мгновенно(?) в другое?
no subject
Date: 2006-10-06 04:05 pm (UTC)From:Сейчас читаю http://plato.stanford.edu/entries/qt-entangle/
no subject
Date: 2006-10-06 04:30 pm (UTC)From:no subject
Date: 2006-10-06 08:07 pm (UTC)From:- До сих пор не было у ортодоксальных ученых твердых оснований применять такой же подход и к материи. Пока не понимаю, что они там сделали. На первый взгляд, настоящий "beam up", с переходом вещества в излучение и обратно: "It is one step further because for the first time it involves teleportation between light and matter, two different objects. One is the carrier of information and the other one is the storage medium". Ну, превратить-то все в излучение давно могли, и передать информацию (описание) чтобы "вручную" построить на новом месте тоже можно. А что там у них получилось? Пытаюсь понять этот загадочный для меня Quantum Entanglement.
Обязательно вернусь к этому вопросу, когда будет, что сказать.
p.s.
Date: 2006-10-06 04:33 pm (UTC)From:Re: p.s.
Date: 2006-10-06 08:08 pm (UTC)From:Re: p.s.
Date: 2006-10-06 08:11 pm (UTC)From:Quantum Entanglement
Date: 2006-10-06 08:37 pm (UTC)From:"Schrödinger coined the term ‘entanglement’ to describe this peculiar connection between quantum systems (Schrödinger, 1935; p. 555):
When two systems, of which we know the states by their respective representatives, enter into temporary physical interaction due to known forces between them, and when after a time of mutual influence the systems separate again, then they can no longer be described in the same way as before, viz. by endowing each of them with a representative of its own. I would not call that one but rather the characteristic trait of quantum mechanics, the one that enforces its entire departure from classical lines of thought. By the interaction the two representatives [the quantum states] have become entangled."
no subject
Date: 2006-10-06 08:50 pm (UTC)From:"In the second part of the paper, Schrödinger showed that, in general, a sophisticated experimenter can, by a suitable choice of operations carried out on one system, ‘steer’ the second system into any chosen ‘mixture’ of quantum states. That is, the second system cannot be steered into any particular state at the whim of the experimenter, but the experimenter can constrain the state into which the second system evolves to lie in any chosen set of states, with a probability distribution fixed by the entangled state. He found this conclusion sufficiently unsettling to suggest that the entanglement between two separating systems would persist only for distances small enough that the time taken by light to travel from one system to the other could be neglected, compared with the characteristic time periods associated with other changes in the composite system. He speculated that for longer distances each of the two systems might in fact be in a state associated with a certain mixture, determined by the precise form of the entangled state."
Quantum Teleportation
Date: 2006-10-06 09:08 pm (UTC)From:"Consider again Schrödinger's realization that an entangled state could be used to steer a distant particle into one of a set of states, with a certain probability. In fact, this possibility of ‘remote steering’ is even more dramatic than Schrödinger demonstrated. Suppose Alice and Bob share an entangled state of the sort considered by Bell, say two photons in an entangled state of polarization. That is, Alice has in her possession one of the entangled photons, and Bob the other. Suppose that Alice has an additional photon in an unknown state of polarization, u. It is possible for Alice to perform an operation on the two photons in her possession that will transform Bob's photon into one of four states, depending on the four possible (random) outcomes of Alice's operation: either the state u, or a state that is related to u in a definite way. Alice's operation entangles the two photons in her possession, and disentangles Bob's photon, steering it into a state u*. After Alice communicates the outcome of her operation to Bob, Bob knows either that u* = u, or how to transform u* to u by a local operation. This phenomenon is known as ‘quantum teleportation.’"