Single-Atom Single-Photon Quantum Interface

A major challenge for a scalable quantum computing architecture is the faithful transfer of information from one node to another. We report on the realization of an atom-photon quantum interface based on an optical cavity, using it to entangle a single atom with a single photon and then to map the quantum state of the atom onto a second single photon. The latter step disentangles the atom from the light and produces an entangled photon pair. Our scheme is intrinsically deterministic and establishes the basic element required to realize a distributed quantum network with individual atoms at rest as quantum memories and single flying photons as quantum messengers.

[1]  J. Cirac,et al.  Quantum State Transfer and Entanglement Distribution among Distant Nodes in a Quantum Network , 1996, quant-ph/9611017.

[2]  Wolfgang Dür,et al.  Quantum Repeaters: The Role of Imperfect Local Operations in Quantum Communication , 1998 .

[3]  P. Knight,et al.  Proposal for teleportation of an atomic state via cavity decay , 1999, quant-ph/9908004.

[4]  C. Monroe,et al.  Experimental entanglement of four particles , 2000, Nature.

[5]  Kuhn,et al.  Vacuum-stimulated raman scattering based on adiabatic passage in a high-finesse optical cavity , 2000, Physical review letters.

[6]  E. Knill,et al.  A scheme for efficient quantum computation with linear optics , 2001, Nature.

[7]  Andrew G. White,et al.  Measurement of qubits , 2001, quant-ph/0103121.

[8]  J. Raimond,et al.  Manipulating quantum entanglement with atoms and photons in a cavity , 2001 .

[9]  Axel Kuhn,et al.  Kuhn, Hennrich, and Rempe Reply to Comment on "Deterministic single-photon source for distributed quantum networking" , 2002 .

[10]  H. Kimble,et al.  Efficient engineering of multiatom entanglement through single-photon detections. , 2003, Physical review letters.

[11]  M. B. Plenio,et al.  Robust creation of entanglement between ions in spatially separate cavities. , 2003 .

[12]  C. Monroe,et al.  Observation of entanglement between a single trapped atom and a single photon , 2004, Nature.

[13]  A. D. Boozer,et al.  Deterministic Generation of Single Photons from One Atom Trapped in a Cavity , 2004, Science.

[14]  Herbert Walther,et al.  Continuous generation of single photons with controlled waveform in an ion-trap cavity system , 2004, Nature.

[15]  G. Rempe,et al.  Photon statistics of a non-stationary periodically driven single-photon source , 2004, quant-ph/0406034.

[16]  Paul G. Kwiat,et al.  Photonic State Tomography , 2005 .

[17]  G. Rempe,et al.  Vacuum-stimulated cooling of single atoms in three dimensions , 2005, quant-ph/0506067.

[18]  P Grangier,et al.  Controlled Single-Photon Emission from a Single Trapped Two-Level Atom , 2005, Science.

[19]  F. Verstraete,et al.  Sequential generation of entangled multiqubit states. , 2005, Physical review letters.

[20]  Y. Lim,et al.  Repeat-until-success linear optics distributed quantum computing. , 2005, Physical review letters.

[21]  Alessio Serafini,et al.  Distributed quantum computation via optical fibers. , 2006, Physical review letters.

[22]  H. Weinfurter,et al.  Observation of entanglement of a single photon with a trapped atom. , 2006, Physical review letters.

[23]  Polarization-controlled single photons. , 2006, Physical review letters.

[24]  A. Kuhn,et al.  A Single-Photon Server with Just One Atom , 2007, 2007 European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference.