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Godlike Productions - News: Faster-than-light pulsar radio waves found
Godlike Productions - News: Quantum teleportation achieved over ten miles of free space
Quantum teleportation has achieved a new milestone or, should we say, a new ten-milestone: scientists have recently had success teleporting information between photons over a free space distance of nearly ten miles, an unprecedented length. The researchers who have accomplished this feat note that this brings us closer to communicating information without needing a traditional signal, and that the ten miles they have reached could span the distance between the surface of the earth and space.
As we've explained before, "quantum teleportation" is quite different from how many people imagine teleportation to work. Rather than picking one thing up and placing it somewhere else, quantum teleportation involves entangling two things, like photons or ions, so their states are dependent on one another and each can be affected by the measurement of the other's state.
When one of the items is sent a distance away, entanglement ensures that changing the state of one causes the other to change as well, allowing the teleportation of quantum information, if not matter. However, the distance particles can be from each other has been limited so far to a number of meters.''
''Astrophysicists working out of the University of Texas at Brownsville have been studying an interesting pulsar about 10,000 light years away from us (a pulsar is a highly magnetic, spinning corpse of a dead star). Over the course of three days of monitoring, radio waves emitted from the pulsar seem to have been traveling faster than the speed of light.
You might have heard that faster-than-light travel is impossible. This is not entirely true -- there are a couple of catches which allow for F.T.L velocities. One such catch, as originally proposed by Mr. Einstein, is that something can travel faster than light if it does not contain information.''
Both these things can't be true. Any thoughts?
Godlike Productions - News: Quantum teleportation achieved over ten miles of free space
Quantum teleportation has achieved a new milestone or, should we say, a new ten-milestone: scientists have recently had success teleporting information between photons over a free space distance of nearly ten miles, an unprecedented length. The researchers who have accomplished this feat note that this brings us closer to communicating information without needing a traditional signal, and that the ten miles they have reached could span the distance between the surface of the earth and space.
As we've explained before, "quantum teleportation" is quite different from how many people imagine teleportation to work. Rather than picking one thing up and placing it somewhere else, quantum teleportation involves entangling two things, like photons or ions, so their states are dependent on one another and each can be affected by the measurement of the other's state.
When one of the items is sent a distance away, entanglement ensures that changing the state of one causes the other to change as well, allowing the teleportation of quantum information, if not matter. However, the distance particles can be from each other has been limited so far to a number of meters.''
''Astrophysicists working out of the University of Texas at Brownsville have been studying an interesting pulsar about 10,000 light years away from us (a pulsar is a highly magnetic, spinning corpse of a dead star). Over the course of three days of monitoring, radio waves emitted from the pulsar seem to have been traveling faster than the speed of light.
You might have heard that faster-than-light travel is impossible. This is not entirely true -- there are a couple of catches which allow for F.T.L velocities. One such catch, as originally proposed by Mr. Einstein, is that something can travel faster than light if it does not contain information.''
Both these things can't be true. Any thoughts?
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