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â€?Beam me up, Scotty! - Teleportation, and Personal Identity

Johnson, Charles W.

Published Jan 1, 2002• 0 citations

Abstract

Near the end of the Nineteenth Century a Prussian\nwoman arrived at her local telegraph office with a bowl of\nsauerkraut she wanted sent to her son. She insisted that,\nif soldiers could be sent to the front by telegraph, certainly\nher sauerkraut could be sent the same way. (Standage,\n1998)\nThe Prussian woman thought that communication\nand transportation could coincide. She may have been\ncorrect. In 1993 an IBM scientist, Charles H. Bennett,\npredicted that quantum teleportation is possible, but only if\nthe original object is destroyed. More recently, in October,\n1998, Caltech scientist H. Jeff Kimble succeeded in\ninstantaneously transporting information contained in the\nquantum state of a photon one meter across a lab bench\nwithout it traversing any physical medium in between.\nKimble and his colleagues used an extremely delicate\nquantum mechanical phenomenon, â€?quantum\nentanglement.â€? Kimble"s findings suggest that\nteleportation of the sort depicted in the Star Trek television\nseries and movies is theoretically possible.

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The dream of teleportation is to be able to travelby simply reappearing at some distant location. Itmight appear that one could scan the object andsend the information so that the object can bereconstructed at the destination. In conventionalfacsimile transmission an original object isscanned to extract partial information about it.The scanned information is sent to the receivingstation, where it is used to produce anapproximate copy of the original object. Theoriginal remains intact after the scanning process.By contrast, in quantum teleportation, theuncertainty principle forbids any scanningprocess from extracting all the information in aquantum state. Charles H. Bennett and hiscoworkers showed that a quantum state can beteleported provides one does not know that stateusing a celebrated and paradoxical feature ofquantum mechanics known as the Einstein-Podolsky-Rosen (EPR) effect. In brief, they found away to scan out part of the information from anobject

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Quantum teleportation is the disembodied transport of an unknown quantum state |ψ〉 from one place to another. All protocols for accomplishing such transport require nonlocal correlations, or entanglement, between systems shared by sender and receiver. The sender is normally called Alice and the receiver is called Bob . Most attention has focused on teleporting the states of finite-dimensional systems, such as the two-dimensional polarization of a photon or the discrete level structure of an atom. First proposed in 1993 by Charles Bennett and his colleagues [17, 24, 138] quantum teleporation thus allows physicists to take a photon or any other quantum scale particle such as an atom and transfer its properties (such as the polarization) to another photon even if the two photons are on opposite sides of the galaxy. This scheme transports the particle’s properties to the remote location and not the particle itself. The state of the original particle must be destroyed to create an exact reconstruction at the other end. This is a consequence of the no cloning theorem. A role in the teleportation scheme is played by an entangled ancillary pair of particles which will be initially shared by Alice and Bob.

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Teleportation und dichte Kodierung

AuszugUnter Teleportation versteht man die Überwindung des Raumes, ohne dass Zeit vergeht oder ein Weg zurückgelegt wird. Ein Teleportationsverfahren ist durch die Serie Raumschiff Enterprise populär geworden. Scotty, beam me up, there is no intelligent life on this planet! ist unter Science Fiction Fans zu einem geflügelten Wort geworden. Auf dieses Kommando hin wird eine exakte Beschreibung Captain Kirks ermittelt. Mit diesen Informationen wird die Person an Bord des Raumschiffs wieder zusammengesetzt, während sie zeitgleich von dem trostlosen Planeten verschwindet (eine ähnliche Situation illustriert Abbildung 5.1).

Vieweg+Teubner eBooks•Feb 11, 2009•0 citations

Near the end of the Nineteenth Century a Prussian\nwoman arrived at her local telegraph office with a bowl of\nsauerkraut she wanted sent to her son. She insisted that,\nif soldiers could be sent to the front by telegraph, certainly\nher sauerkraut could be sent the same way. (Standage,\n1998)\nThe Prussian woman thought that communication\nand transportation could coincide. She may have been\ncorrect. In 1993 an IBM scientist, Charles H. Bennett,\npredicted that quantum teleportation is possible, but only if\nthe original object is destroyed. More recently, in October,\n1998, Caltech scientist H. Jeff Kimble succeeded in\ninstantaneously transporting information contained in the\nquantum state of a photon one meter across a lab bench\nwithout it traversing any physical medium in between.\nKimble and his colleagues used an extremely delicate\nquantum mechanical phenomenon, â€?quantum\nentanglement.â€? Kimble"s findings suggest that\nteleportation of the sort depicted in the Star Trek television\nseries and movies is theoretically possible.

The dream of teleportation is to be able to travelby simply reappearing at some distant location. Itmight appear that one could scan the object andsend the information so that the object can bereconstructed at the destination. In conventionalfacsimile transmission an original object isscanned to extract partial information about it.The scanned information is sent to the receivingstation, where it is used to produce anapproximate copy of the original object. Theoriginal remains intact after the scanning process.By contrast, in quantum teleportation, theuncertainty principle forbids any scanningprocess from extracting all the information in aquantum state. Charles H. Bennett and hiscoworkers showed that a quantum state can beteleported provides one does not know that stateusing a celebrated and paradoxical feature ofquantum mechanics known as the Einstein-Podolsky-Rosen (EPR) effect. In brief, they found away to scan out part of the information from anobject

Quantum teleportation is the disembodied transport of an unknown quantum state |ψ〉 from one place to another. All protocols for accomplishing such transport require nonlocal correlations, or entanglement, between systems shared by sender and receiver. The sender is normally called Alice and the receiver is called Bob . Most attention has focused on teleporting the states of finite-dimensional systems, such as the two-dimensional polarization of a photon or the discrete level structure of an atom. First proposed in 1993 by Charles Bennett and his colleagues [17, 24, 138] quantum teleporation thus allows physicists to take a photon or any other quantum scale particle such as an atom and transfer its properties (such as the polarization) to another photon even if the two photons are on opposite sides of the galaxy. This scheme transports the particle’s properties to the remote location and not the particle itself. The state of the original particle must be destroyed to create an exact reconstruction at the other end. This is a consequence of the no cloning theorem. A role in the teleportation scheme is played by an entangled ancillary pair of particles which will be initially shared by Alice and Bob.

AuszugUnter Teleportation versteht man die Überwindung des Raumes, ohne dass Zeit vergeht oder ein Weg zurückgelegt wird. Ein Teleportationsverfahren ist durch die Serie Raumschiff Enterprise populär geworden. Scotty, beam me up, there is no intelligent life on this planet! ist unter Science Fiction Fans zu einem geflügelten Wort geworden. Auf dieses Kommando hin wird eine exakte Beschreibung Captain Kirks ermittelt. Mit diesen Informationen wird die Person an Bord des Raumschiffs wieder zusammengesetzt, während sie zeitgleich von dem trostlosen Planeten verschwindet (eine ähnliche Situation illustriert Abbildung 5.1).