dorsal/arxiv
View SchemaQuantum teleportation between light and matter
| Authors | Jacob Sherson, Hanna Krauter, Rasmus K. Olsson, Brian Julsgaard, Klemens Hammerer, Ignacio Cirac, Eugene S. Polzik |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0605095 |
| URL | https://arxiv.org/abs/quant-ph/0605095 |
| DOI | 10.1038/nature05136 |
| Journal | Nature 443, 557-560 (5 October 2006) |
Abstract
Quantum teleportation is an important ingredient in distributed quantum networks, and can also serve as an elementary operation in quantum computers. Teleportation was first demonstrated as a transfer of a quantum state of light onto another light beam; later developments used optical relays and demonstrated entanglement swapping for continuous variables. The teleportation of a quantum state between two single material particles (trapped ions) has now also been achieved. Here we demonstrate teleportation between objects of a different nature - light and matter, which respectively represent 'flying' and 'stationary' media. A quantum state encoded in a light pulse is teleported onto a macroscopic object (an atomic ensemble containing 10^12 caesium atoms). Deterministic teleportation is achieved for sets of coherent states with mean photon number (n) up to a few hundred. The fidelities are 0.58+-0.02 for n=20 and 0.60+-0.02 for n=5 - higher than any classical state transfer can possibly achieve. Besides being of fundamental interest, teleportation using a macroscopic atomic ensemble is relevant for the practical implementation of a quantum repeater. An important factor for the implementation of quantum networks is the teleportation distance between transmitter and receiver; this is 0.5 metres in the present experiment. As our experiment uses propagating light to achieve the entanglement of light and atoms required for teleportation, the present approach should be scalable to longer distances.
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"abstract": "Quantum teleportation is an important ingredient in distributed quantum\nnetworks, and can also serve as an elementary operation in quantum computers.\nTeleportation was first demonstrated as a transfer of a quantum state of light\nonto another light beam; later developments used optical relays and\ndemonstrated entanglement swapping for continuous variables. The teleportation\nof a quantum state between two single material particles (trapped ions) has now\nalso been achieved. Here we demonstrate teleportation between objects of a\ndifferent nature - light and matter, which respectively represent \u0027flying\u0027 and\n\u0027stationary\u0027 media. A quantum state encoded in a light pulse is teleported onto\na macroscopic object (an atomic ensemble containing 10^12 caesium atoms).\nDeterministic teleportation is achieved for sets of coherent states with mean\nphoton number (n) up to a few hundred. The fidelities are 0.58+-0.02 for n=20\nand 0.60+-0.02 for n=5 - higher than any classical state transfer can possibly\nachieve. Besides being of fundamental interest, teleportation using a\nmacroscopic atomic ensemble is relevant for the practical implementation of a\nquantum repeater. An important factor for the implementation of quantum\nnetworks is the teleportation distance between transmitter and receiver; this\nis 0.5 metres in the present experiment. As our experiment uses propagating\nlight to achieve the entanglement of light and atoms required for\nteleportation, the present approach should be scalable to longer distances.",
"arxiv_id": "quant-ph/0605095",
"authors": [
"Jacob Sherson",
"Hanna Krauter",
"Rasmus K. Olsson",
"Brian Julsgaard",
"Klemens Hammerer",
"Ignacio Cirac",
"Eugene S. Polzik"
],
"categories": [
"quant-ph"
],
"doi": "10.1038/nature05136",
"journal_ref": "Nature 443, 557-560 (5 October 2006)",
"title": "Quantum teleportation between light and matter",
"url": "https://arxiv.org/abs/quant-ph/0605095"
},
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