Quantum teleportation between light and matter

By Jacob Friis Sherson, H. Krauter, R. Olsson, B. Julsgaard, Klemens Hammerer, I. Cirac, Eugene Simon Polzik. Nature, 2006

730 citations recorded by the source corpus.

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.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/21d42aba90be2aa55c3b20aa56d01010a8285fed

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Citations in the corpus

Quantum storage of photonic entanglement in a crystal (2010, neutral): “[15] Sherson, J.”
Single-Molecule Magnets: From Mn12-ac to dysprosium metallocenes, a travel in time (2021, background): “Combining SMM and CPL features is captivating due to the fact that, just like SMMs (see next section), systems showing this chiroptical property are potential candidates for spintronic devices [179] and information storage [180] among other applications [181,182].”
Quantum interface between light and atomic ensembles (2008, methodology): “The measurement of and the feedback on more than one mode can be described by an immediate generalization of (67) as shown in (Hammerer et al., 2005a; Sherson et al., 2006c), provided the measurement involves commuting observables only.”