[ { "id": "authors:8e8bx-54847", "collection": "authors", "collection_id": "8e8bx-54847", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20140107-143746870", "type": "article", "title": "Atom-Light Interactions in Photonic Crystals", "author": [ { "family_name": "Goban", "given_name": "A.", "clpid": "Goban-Akihisa" }, { "family_name": "Hung", "given_name": "C.-L.", "orcid": "0000-0002-6879-3639", "clpid": "Hung-Chao-Ling" }, { "family_name": "Yu", "given_name": "S.-P.", "orcid": "0000-0003-1348-7447", "clpid": "Yu-Su-Peng" }, { "family_name": "Hood", "given_name": "J. D.", "clpid": "Hood-J-D" }, { "family_name": "Muniz", "given_name": "J. A.", "clpid": "Muniz-J-A" }, { "family_name": "Lee", "given_name": "J. H.", "clpid": "Lee-Jeff-H" }, { "family_name": "Martin", "given_name": "M. J.", "clpid": "Martin-M-J" }, { "family_name": "McClung", "given_name": "A. C.", "clpid": "McClung-A-C" }, { "family_name": "Choi", "given_name": "K. S.", "clpid": "Choi-Kyung-Soo" }, { "family_name": "Chang", "given_name": "D. E.", "clpid": "Chang-Dong-Eui" }, { "family_name": "Painter", "given_name": "O.", "orcid": "0000-0002-1581-9209", "clpid": "Painter-O" }, { "family_name": "Kimble", "given_name": "H. J.", "clpid": "Kimble-H-J" } ], "abstract": "The integration of nanophotonics and atomic physics has been a long-sought goal that would open new frontiers for optical physics, including novel quantum transport and many-body phenomena with photon-mediated atomic interactions. Reaching this goal requires surmounting diverse challenges in nanofabrication and atomic manipulation. Here we report the development of a novel integrated optical circuit with a photonic crystal capable of both localizing and interfacing atoms with guided photons. Optical bands of a photonic crystal waveguide are aligned with selected atomic transitions. From reflection spectra measured with average atom number N = 1.1 \u00b1 0.4, we infer that atoms are localized within the waveguide by optical dipole forces. The fraction of single-atom radiative decay into the waveguide is \u0393_(1D)/\u0393'\u2243(0.32\u00b10.08), where \u0393_(1D) is the rate of emission into the guided mode and \u0393' is the decay rate into all other channels. \u0393_(1D)/\u0393\u2032 is unprecedented in all current atom\u2013photon interfaces.", "doi": "10.1038/ncomms4808", "issn": "2041-1723", "publisher": "Nature Publishing Group", "publication": "Nature Communications", "publication_date": "2014-05", "series_number": "5", "volume": "5", "issue": "5", "pages": "Art. No. 3808" }, { "id": "authors:aqvss-z1f64", "collection": "authors", "collection_id": "aqvss-z1f64", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20130123-085549055", "type": "monograph", "title": "Corrections to our results for optical nanofiber traps in Cesium", "author": [ { "family_name": "Ding", "given_name": "D.", "clpid": "Ding-D" }, { "family_name": "Goban", "given_name": "A.", "clpid": "Goban-Akihisa" }, { "family_name": "Choi", "given_name": "K. S.", "clpid": "Choi-Kyung-Soo" }, { "family_name": "Kimble", "given_name": "H. J.", "clpid": "Kimble-H-J" } ], "abstract": "Several errors in Refs. [1, 2] are corrected related to the optical trapping potentials for a state-insensitive, compensated nanofiber trap for the D_2 transition of atomic Cesium. Section I corrects our basic formalism in Ref. [1] for calculating dipole-force potentials. Section II corrects erroneous values for a partial lifetime and a transition wavelength in Ref. [1]. Sections III and IV present corrected figures for various trapping configurations considered in Refs. [1] and [2], respectively.", "doi": "10.48550/arXiv.1212.4941", "publication_date": "2012-12-20" }, { "id": "authors:xc4s7-ean20", "collection": "authors", "collection_id": "xc4s7-ean20", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20120515-133717073", "type": "article", "title": "Demonstration of a state-insensitive, compensated nanofiber trap", "author": [ { "family_name": "Goban", "given_name": "A.", "clpid": "Goban-Akihisa" }, { "family_name": "Choi", "given_name": "K. S.", "clpid": "Choi-Kyung-Soo" }, { "family_name": "Alton", "given_name": "D. J.", "clpid": "Alton-D-J" }, { "family_name": "Ding", "given_name": "D.", "clpid": "Ding-D" }, { "family_name": "Lacro\u00fbte", "given_name": "C.", "clpid": "Lacro\u00fbte-C" }, { "family_name": "Pototschnig", "given_name": "M.", "clpid": "Pototschnig-M" }, { "family_name": "Thiele", "given_name": "T.", "clpid": "Thiele-T" }, { "family_name": "Stern", "given_name": "N. P.", "clpid": "Stern-N-P" }, { "family_name": "Kimble", "given_name": "H. J.", "clpid": "Kimble-H-J" } ], "abstract": "We report the experimental realization of an optical trap that localizes single Cs atoms \u2243 215\nnm from surface of a dielectric nanober. By operating at magic wavelengths for pairs of counterpropagating\nred- and blue-detuned trapping beams, dierential scalar light shifts are eliminated, and\nvector shifts are suppressed by \u2248 250. We thereby measure an absorption linewidth \u0393/2\u03c0 = 5.7 \u00b1 0.1\nMHz for the Cs 6S_(1/2), F = 4 \u2192 6P_(3/2), F' = 5 transition, where \u0393_0/2\u03c0 = 5.2 MHz in free space.\nOptical depth d \u2243 66 is observed, corresponding to an optical depth per atom d_1 \u2243 0.08. These\nadvances provide an important capability for the implementation of functional quantum optical\nnetworks and precision atomic spectroscopy near dielectric surfaces.", "doi": "10.1103/PhysRevLett.109.033603", "issn": "0031-9007", "publisher": "American Physical Society", "publication": "Physical Review Letters", "publication_date": "2012-07-19", "series_number": "3", "volume": "109", "issue": "3", "pages": "Art. No. 033603" }, { "id": "authors:4w7bk-pdb79", "collection": "authors", "collection_id": "4w7bk-pdb79", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20111107-134850810", "type": "article", "title": "A state-insensitive, compensated nanofiber trap", "author": [ { "family_name": "Lacro\u00fbte", "given_name": "C.", "clpid": "Lacro\u00fbte-C" }, { "family_name": "Choi", "given_name": "K. S.", "clpid": "Choi-Kyung-Soo" }, { "family_name": "Goban", "given_name": "A.", "clpid": "Goban-Akihisa" }, { "family_name": "Alton", "given_name": "D. J.", "clpid": "Alton-D-J" }, { "family_name": "Ding", "given_name": "D.", "clpid": "Ding-D" }, { "family_name": "Stern", "given_name": "N. P.", "clpid": "Stern-N-P" }, { "family_name": "Kimble", "given_name": "H. J.", "clpid": "Kimble-H-J" } ], "abstract": "Laser trapping and interfacing of laser-cooled atoms in an optical fiber network is an important tool for quantum information science. Following the pioneering work of Balykin et al (2004 Phys. Rev. A 70 011401) and Vetsch et al (2010 Phys. Rev. Lett. 104 203603), we propose a robust method for trapping single cesium atoms with a two-color state-insensitive evanescent wave around a dielectric nanofiber. Specifically, we show that vector light shifts (i.e. effective inhomogeneous Zeeman broadening of the ground states) induced by the inherent ellipticity of the forward-propagating evanescent wave can be effectively canceled by a backward-propagating evanescent wave. Furthermore, by operating the trapping lasers at the magic wavelengths, we remove the differential scalar light shift between ground and excited states, thereby allowing for resonant driving of the optical D_2 transition. This scheme provides a promising approach to trap and probe neutral atoms with long trap and coherence lifetimes with realistic experimental parameters.", "doi": "10.1088/1367-2630/14/2/023056", "issn": "1367-2630", "publisher": "IOP", "publication": "New Journal of Physics", "publication_date": "2012-02-28", "volume": "14", "pages": "Art. No. 023056" }, { "id": "authors:1n2as-xw772", "collection": "authors", "collection_id": "1n2as-xw772", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20110103-103740097", "type": "article", "title": "Entanglement of spin waves among four quantum memories", "author": [ { "family_name": "Choi", "given_name": "K. S.", "clpid": "Choi-Kyung-Soo" }, { "family_name": "Goban", "given_name": "A.", "clpid": "Goban-Akihisa" }, { "family_name": "Papp", "given_name": "S. B.", "clpid": "Papp-S-B" }, { "family_name": "van Enk", "given_name": "S. J.", "clpid": "van-Enk-S-J" }, { "family_name": "Kimble", "given_name": "H. J.", "clpid": "Kimble-H-J" } ], "abstract": "Quantum networks are composed of quantum nodes that interact coherently through quantum channels, and open a broad frontier of scientific opportunities. For example, a quantum network can serve as a 'web' for connecting quantum processors for computation and communication, or as a 'simulator' allowing investigations of quantum critical phenomena arising from interactions among the nodes mediated by the channels. The physical realization of quantum networks generically requires dynamical systems capable of generating and storing entangled states among multiple quantum memories, and efficiently transferring stored entanglement into quantum channels for distribution across the network. Although such capabilities have been demonstrated for diverse bipartite systems, entangled states have not been achieved for interconnects capable of 'mapping' multipartite entanglement stored in quantum memories to quantum channels. Here we demonstrate measurement-induced entanglement stored in four atomic memories; user-controlled, coherent transfer of the atomic entanglement to four photonic channels; and characterization of the full quadripartite entanglement using quantum uncertainty relations. Our work therefore constitutes an advance in the distribution of multipartite entanglement across quantum networks. We also show that our entanglement verification method is suitable for studying the entanglement order of condensed-matter systems in thermal equilibrium.", "doi": "10.1038/nature09568", "issn": "0028-0836", "publisher": "Nature Publishing Group", "publication": "Nature", "publication_date": "2010-11-18", "series_number": "7322", "volume": "468", "issue": "7322", "pages": "412-416" }, { "id": "authors:nn44k-rjp22", "collection": "authors", "collection_id": "nn44k-rjp22", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20090903-122422330", "type": "article", "title": "Verifying multipartite mode entanglement of W states", "author": [ { "family_name": "Lougovski", "given_name": "Pavel", "clpid": "Lougovski-P" }, { "family_name": "van Enk", "given_name": "S. J.", "clpid": "van-Enk-S-J" }, { "family_name": "Choi", "given_name": "Kyung Soo", "clpid": "Choi-Kyung-Soo" }, { "family_name": "Papp", "given_name": "Scott B.", "clpid": "Papp-S-B" }, { "family_name": "Deng", "given_name": "Hui", "clpid": "Deng-Hui" }, { "family_name": "Kimble", "given_name": "H. J.", "clpid": "Kimble-H-J" } ], "abstract": "We construct a method for verifying mode entanglement of N-mode W states. The ideal W state contains exactly one excitation symmetrically shared between N modes, but our method takes the existence of higher numbers of excitations into account, as well as the vacuum state and other deviations from the ideal state. Moreover, our method distinguishes between full N-party entanglement and states with M-party entanglement with M", "doi": "10.1088/1367-2630/11/6/063029", "issn": "1367-2630", "publisher": "IOP", "publication": "New Journal of Physics", "publication_date": "2009-06-16", "series_number": "6", "volume": "11", "issue": "6", "pages": "Art, No. 063029" }, { "id": "authors:fr6eb-ta892", "collection": "authors", "collection_id": "fr6eb-ta892", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20090610-100904573", "type": "article", "title": "Characterization of multipartite entanglement for one photon shared among four optical modes", "author": [ { "family_name": "Papp", "given_name": "Scott B.", "clpid": "Papp-S-B" }, { "family_name": "Choi", "given_name": "Kyung Soo", "clpid": "Choi-Kyung-Soo" }, { "family_name": "Deng", "given_name": "Hui", "clpid": "Deng-Hui" }, { "family_name": "Lougovski", "given_name": "Pavel", "clpid": "Lougovski-P" }, { "family_name": "van Enk", "given_name": "S. J.", "clpid": "van-Enk-S-J" }, { "family_name": "Kimble", "given_name": "H. J.", "clpid": "Kimble-H-J" } ], "abstract": "Access to genuine multipartite entanglement of quantum states enables advances in quantum information science and also contributes to the understanding of strongly correlated quantum systems. We report the detection and characterization of heralded entanglement in a multipartite quantum state composed of four spatially distinct optical modes that share one photon, a so-called W state. By randomizing the relative phase between bipartite components of the W state, we observed the transitions from four- to three- to two-mode entanglement with increasing phase noise. These observations are possible for our system because our entanglement verification protocol makes use of quantum uncertainty relations to detect the entangled states that span the Hilbert space of interest.", "doi": "10.1126/science.1172260", "issn": "0036-8075", "publisher": "American Association for the Advancement of Science", "publication": "Science", "publication_date": "2009-05-08", "series_number": "5928", "volume": "324", "issue": "5928", "pages": "764-768" }, { "id": "authors:2x3yp-90t12", "collection": "authors", "collection_id": "2x3yp-90t12", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160504-124937057", "type": "book_section", "title": "Matter-matter entanglement for quantum networks", "book_title": "Quantum communication, measurement and computing (QCMC): the ninth international conference", "author": [ { "family_name": "Laurat", "given_name": "Julien", "clpid": "Laurat-J" }, { "family_name": "Choi", "given_name": "Kyung Soo", "clpid": "Choi-Kyung-Soo" }, { "family_name": "Deng", "given_name": "Hui", "clpid": "Deng-Hui" }, { "family_name": "Kimble", "given_name": "H. J.", "clpid": "Kimble-H-J" } ], "contributor": [ { "family_name": "Lvovsky", "given_name": "Alexander", "clpid": "Lvovsky-A" } ], "abstract": "Developments in quantum information science rely critically on entanglement, as its distribution between different parties enables quantum communication protocols, such as quantum key distribution or teleportation. This talk focused on two different ways to generate heralded entanglement between matter systems, a critical requirement for scalable quantum networking.", "doi": "10.1063/1.3131316", "isbn": "978-0-7354-0647-6", "publisher": "American Institute of Physics", "place_of_publication": "Melville, NY", "publication_date": "2009-04-13", "pages": "239-244" }, { "id": "authors:m5ypb-wz792", "collection": "authors", "collection_id": "m5ypb-wz792", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20121024-091021991", "type": "book_section", "title": "Generation and distribution of heralded entanglement between atomic ensembles for scalable quantum networks", "book_title": "2008 Conference on Lasers and Electro-Optics & Quantum Electronics and Laser Science Conference", "author": [ { "family_name": "Choi", "given_name": "Kyung Soo", "clpid": "Choi-Kyung-Soo" }, { "family_name": "Laurat", "given_name": "Julien", "clpid": "Laurat-J" }, { "family_name": "Deng", "given_name": "Hui", "clpid": "Deng-Hui" }, { "family_name": "Chou", "given_name": "Chin-Wen", "clpid": "Chou-Chin-Wen" }, { "family_name": "de Riedmatten", "given_name": "Hugues", "clpid": "de-Riedmatten-H" }, { "family_name": "Felinto", "given_name": "Daniel", "clpid": "Felinto-D" }, { "family_name": "Kimble", "given_name": "H. Jeff", "clpid": "Kimble-H-J" } ], "abstract": "Entanglement is generated by path-erasing detection of single photon emitted indistinguishably by two atomic ensembles. We characterize relationship of degree of entanglement to local dephasing. Parallel pairs of entanglement are distributed to polarization entanglement via conditional control.", "isbn": "978-1-55752-859-9", "publisher": "Optical Society of America", "place_of_publication": "Washington, DC", "publication_date": "2008-05", "pages": "3510-3511" }, { "id": "authors:wrck3-9q789", "collection": "authors", "collection_id": "wrck3-9q789", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20121024-093723578", "type": "book_section", "title": "Mapping entanglement in and out of quantum memories", "book_title": "2008 Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference", "author": [ { "family_name": "Deng", "given_name": "Hui", "clpid": "Deng-Hui" }, { "family_name": "Choi", "given_name": "Kyung S.", "clpid": "Choi-Kyung-Soo" }, { "family_name": "Laurat", "given_name": "Julien", "clpid": "Laurat-J" }, { "family_name": "Kimble", "given_name": "H. Jeff", "clpid": "Kimble-H-J" } ], "abstract": "We report entanglement generation in atomic quantum memories via deterministic mapping of photonic entanglement. The atomic entanglement is retrieved back into photon modes after a programmable storage time, with an overall efficiency of 17%.", "isbn": "978-1-55752-859-9", "publisher": "Optical Society of America", "place_of_publication": "Washington, DC", "publication_date": "2008-05", "pages": "3512-3513" }, { "id": "authors:x4mzq-qk860", "collection": "authors", "collection_id": "x4mzq-qk860", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20121024-090153274", "type": "article", "title": "Mapping photonic entanglement into and out of a quantum memory", "author": [ { "family_name": "Choi", "given_name": "K. S.", "clpid": "Choi-Kyung-Soo" }, { "family_name": "Deng", "given_name": "H.", "clpid": "Deng-Hui" }, { "family_name": "Kimble", "given_name": "H. J.", "clpid": "Kimble-H-J" } ], "abstract": "Developments in quantum information science rely critically on entanglement\u2014a fundamental aspect of quantum mechanics that causes parts of a composite system to show correlations stronger than can be explained classically. In particular, scalable quantum networks require the capability to create, store and distribute entanglement among distant matter nodes by means of photonic channels. Atomic ensembles can play the role of such nodes. So far, in the photon-counting regime, heralded entanglement between atomic ensembles has been successfully demonstrated through probabilistic protocols. But an inherent drawback of this approach is the compromise between the amount of entanglement and its preparation probability, leading to intrinsically low count rates for high entanglement. Here we report a protocol where entanglement between two atomic ensembles is created by coherent mapping of an entangled state of light. By splitting a single photon and performing subsequent state transfer, we separate the generation of entanglement and its storage. After a programmable delay, the stored entanglement is mapped back into photonic modes with overall efficiency of 17%. Together with improvements in single-photon sources, our protocol will allow 'on-demand' entanglement of atomic ensembles, a powerful resource for quantum information science.", "doi": "10.1038/nature06670", "issn": "0028-0836", "publisher": "Nature Publishing Group", "publication": "Nature", "publication_date": "2008-03-06", "series_number": "7183", "volume": "452", "issue": "7183", "pages": "67-71" }, { "id": "authors:jner2-xp487", "collection": "authors", "collection_id": "jner2-xp487", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:LAUprl07", "type": "article", "title": "Heralded Entanglement between Atomic Ensembles: Preparation, Decoherence, and Scaling", "author": [ { "family_name": "Laurat", "given_name": "J.", "clpid": "Laurat-J" }, { "family_name": "Choi", "given_name": "K. S.", "clpid": "Choi-Kyung-Soo" }, { "family_name": "Deng", "given_name": "H.", "clpid": "Deng-Hui" }, { "family_name": "Chou", "given_name": "C. W.", "clpid": "Chou-Chin-Wen" }, { "family_name": "Kimble", "given_name": "H. J.", "clpid": "Kimble-H-J" } ], "abstract": "Heralded entanglement between collective excitations in two atomic ensembles is probabilistically generated, stored, and converted to single-photon fields. By way of the concurrence, quantitative characterizations are reported for the scaling behavior of entanglement with excitation probability and for the temporal dynamics of various correlations resulting in the decay of entanglement. A lower bound of the concurrence for the collective atomic state of 0.9\u00b10.3 is inferred. The decay of entanglement as a function of storage time is also observed, and related to the local dynamics.", "doi": "10.1103/PhysRevLett.99.180504", "issn": "0031-9007", "publisher": "American Physical Society", "publication": "Physical Review Letters", "publication_date": "2007-11-02", "series_number": "18", "volume": "99", "issue": "18", "pages": "Art. No. 180504" }, { "id": "authors:b05yt-2qm24", "collection": "authors", "collection_id": "b05yt-2qm24", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20141118-075249737", "type": "article", "title": "Functional Quantum Nodes for Entanglement Distribution over Scalable Quantum Networks", "author": [ { "family_name": "Chou", "given_name": "Chin-Wen", "clpid": "Chou-Chin-Wen" }, { "family_name": "Laurat", "given_name": "Julien", "clpid": "Laurat-J" }, { "family_name": "Deng", "given_name": "Hui", "clpid": "Deng-Hui" }, { "family_name": "Choi", "given_name": "Kyung Soo", "clpid": "Choi-Kyung-Soo" }, { "family_name": "de Riedmatten", "given_name": "Hugues", "clpid": "de-Riedmatten-H" }, { "family_name": "Felinto", "given_name": "Daniel", "clpid": "Felinto-D" }, { "family_name": "Kimble", "given_name": "H. Jeff", "clpid": "Kimble-H-J" } ], "abstract": "We demonstrated entanglement distribution between two remote quantum nodes located 3 meters apart. This distribution involves the asynchronous preparation of two pairs of atomic memories and the coherent mapping of stored atomic states into light fields in an effective state of near-maximum polarization entanglement. Entanglement is verified by way of the measured violation of a Bell inequality, and it can be used for communication protocols such as quantum cryptography. The demonstrated quantum nodes and channels can be used as segments of a quantum repeater, providing an essential tool for robust long-distance quantum communication.", "doi": "10.1126/science.1140300", "issn": "0036-8075", "publisher": "American Association for the Advancement of Science", "publication": "Science", "publication_date": "2007-06-01", "series_number": "5829", "volume": "316", "issue": "5829", "pages": "1316-1320" }, { "id": "authors:91f9b-d8g30", "collection": "authors", "collection_id": "91f9b-d8g30", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170420-133920024", "type": "book_section", "title": "Quantum Networking with Atomic Ensembles in the Single Excitation Regime", "book_title": "2007 European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference", "author": [ { "family_name": "Laurat", "given_name": "J.", "clpid": "Laurat-J" }, { "family_name": "Chou", "given_name": "C. W.", "clpid": "Chou-Chin-Wen" }, { "family_name": "Deng", "given_name": "H.", "clpid": "Deng-Hui" }, { "family_name": "Choi", "given_name": "K. S.", "clpid": "Choi-Kyung-Soo" }, { "family_name": "de Riedmatten", "given_name": "H.", "clpid": "de-Riedmatten-H" }, { "family_name": "Felinto", "given_name": "D.", "clpid": "Felinto-D" }, { "family_name": "Kimble", "given_name": "H. J.", "clpid": "Kimble-H-J" } ], "abstract": "Quantum networks hold the promise for revolutionary advances in information processing with entanglement distributed over remote locations via quantum repeaters. We report two milestones in this direction: the conditional control of memories and the implementation of functional nodes.", "doi": "10.1109/CLEOE-IQEC.2007.4386782", "isbn": "978-1-4244-0930-3", "publisher": "IEEE", "place_of_publication": "Piscataway, NJ", "publication_date": "2007-06" }, { "id": "authors:8e9cv-k6013", "collection": "authors", "collection_id": "8e9cv-k6013", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:LAUnjp07", "type": "article", "title": "Towards experimental entanglement connection with atomic ensembles in the single excitation regime", "author": [ { "family_name": "Laurat", "given_name": "Julien", "clpid": "Laurat-J" }, { "family_name": "Chou", "given_name": "Chin-Wen", "clpid": "Chou-Chin-Wen" }, { "family_name": "Deng", "given_name": "Hui", "clpid": "Deng-Hui" }, { "family_name": "Choi", "given_name": "Kyung Soo", "clpid": "Choi-Kyung-Soo" }, { "family_name": "Felinto", "given_name": "Daniel", "clpid": "Felinto-D" }, { "family_name": "de Riedmatten", "given_name": "Hugues", "clpid": "de-Riedmatten-H" }, { "family_name": "Kimble", "given_name": "H. J.", "clpid": "Kimble-H-J" } ], "abstract": "We present a protocol for performing entanglement connection between pairs of atomic ensembles in the single excitation regime. Two pairs are prepared in an asynchronous fashion and then connected via a Bell measurement. The resulting state of the two remaining ensembles is mapped to photonic modes and a reduced density matrix is then reconstructed. Our observations confirm for the first time the creation of coherence between atomic systems that never interacted, a first step towards entanglement connection, a critical requirement for quantum networking and long distance quantum communications.", "doi": "10.1088/1367-2630/9/6/207", "issn": "1367-2630", "publisher": "IOP", "publication": "New Journal of Physics", "publication_date": "2007-06", "series_number": "6", "volume": "9", "issue": "6", "pages": "Art. No. 207" } ]