Abstract
Entanglement has been recognised as a puzzling yet central element of quantum physics. While photons serve as flying qubits to distribute entanglement, the entanglement of stationary qubits at remote sites is a key resource for envisioned applications like distributed quantum computing [1]. In our experiment we create remote entanglement between a single atom located inside a high-finesse optical cavity and a Bose-Einstein condensate (BEC). To this end we generate a single photon in the atom-cavity system, entangling the photon polarisation with the atomic Zeeman state [2,3]. The photon is transported to a different laboratory in an optical fiber, where it is stored in a BEC employing electromagnetically induced transparency (EIT) [4-6]. This converts the atom-photon entanglement into remote matter-matter entanglement. Subsequently we map the matter-matter entanglement onto photon-photon entanglement. The experimental setup is sketched in Fig. 1.
© 2011 IEEE
PDF ArticleMore Like This
Mandip Singh
QWE3 Quantum-Atom Optics Downunder (QAO) 2007
N. J. van Druten, D. S. Durfee, K. B. Davis, M.-O. Mewes, M. R. Andrews, D. M. Kurn, and W. Ketterle
QWD2 Quantum Electronics and Laser Science Conference (CLEO:FS) 1996
L. Deng, E. Hagley, K. Helmerson, Y. Ovchinnikov, W. D. Philips, S. L. Rolston, and J. Simsarian
QTuD1 Quantum Electronics and Laser Science Conference (CLEO:FS) 1999