Details
| Original language | English |
|---|---|
| Pages (from-to) | 557-560 |
| Number of pages | 4 |
| Journal | Nature |
| Volume | 443 |
| Issue number | 7111 |
| Publication status | Published - 5 Oct 2006 |
| Externally published | Yes |
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 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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In: Nature, Vol. 443, No. 7111, 05.10.2006, p. 557-560.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Quantum teleportation between light and matter
AU - Sherson, Jacob F.
AU - Krauter, Hanna
AU - Olsson, Rasmus K.
AU - Julsgaard, Brian
AU - Hammerer, Klemens
AU - Cirac, Ignacio
AU - Polzik, Eugene S.
N1 - Funding information: The experiment was performed at the Niels Bohr Institute, and was funded by the Danish National Research Foundation through the Center for Quantum Optics (QUANTOP), by EU grants COVAQIAL and QAP, and by the Carlsberg Foundation. I.C. and E.S.P. acknowledge the hospitality of the Institut de Ciències Fotòniques (ICFO) in Barcelona where ideas leading to this work were first discussed. The permanent address of K.H. is the Institut für theoretische Physik, Innsbruck, Austria.
PY - 2006/10/5
Y1 - 2006/10/5
N2 - 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 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.
AB - 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 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.
UR - http://www.scopus.com/inward/record.url?scp=33749512818&partnerID=8YFLogxK
U2 - 10.1038/nature05136
DO - 10.1038/nature05136
M3 - Article
AN - SCOPUS:33749512818
VL - 443
SP - 557
EP - 560
JO - Nature
JF - Nature
SN - 0028-0836
IS - 7111
ER -