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Displaying 34026 - 34050 of 74175

Experimental purification of two-atom entanglement

October 19, 2006
Author(s)
Rainer Reichle, Dietrich G. Leibfried, Emanuel H. Knill, Joseph W. Britton, Brad R. Blakestad, John D. Jost, C. Langer, R Ozeri, Signe Seidelin, David J. Wineland
Entanglement is one of the most counterintuitive features of quantum mechanics. It is a necessary resource for quantum communication and quantum information processing. Entanglement established between different locations enables private communication and

Kilohertz-level spectroscopy of cold atoms with a femtosecond optical frequency comb

October 19, 2006
Author(s)
Tara Fortier, Yann Le Coq, Jason Stalnaker, Davi Ortega, Scott Diddams, Christopher W. Oates, Leo W. Hollberg
We have performed sub-Doppler spectroscopy on the narrow intercombination line of cold calcium atoms using the amplified output of a femtosecond laser frequency comb. Injection locking of a 657-nm diode laser with a femtosecond comb allowed for two regimes

Overview of the TREC 2005 Robust Retrieval Track

October 16, 2006
Author(s)
Ellen M. Voorhees
The robust retrieval track explores methods for improving the consistency of retrieval technology by focusing on poorly performing topics. The retrieval task in the track is a traditional ad~hoc retrieval task where the evaluation methodology emphasizes a

Overview of the TREC-2005 Enterprise Track

October 16, 2006
Author(s)
Nick Craswell, Arjen P. Vries, Ian Soboroff
The goal of the enterprise track it to conduct experiments with enterprise data-- intranet pages, email archives, document repositories -- that reflect the experiences of real users in real organizations. Such that, for example, an email ranking technique

Fiber-laser frequency combs with subhertz relative linewidths

October 15, 2006
Author(s)
William C. Swann, John J. McFerran, Ian R. Coddington, Nathan R. Newbury, Ingmar Hartl, Martin E. Fermann, Paul S. Westbrook, Jeffrey W. Nicholson, K Feder, Carston Langrock, Martin M. Fejer
We investigate the comb linewidths of self-referenced, fiber-laser-based frequency combs by measuring the heterodyne beat signal between two independent frequency combs that are phase locked to a common cw optical reference. We demonstrate that the optical

Continuous light shift correction in modualted coherent opoulation trapping clocks

October 13, 2006
Author(s)
V Shah, Vladislav Gerginov, P Schwindt, Svenja A. Knappe, Leo W. Hollberg, John E. Kitching
We demonstrate a simple technique to significantly improve the long term frequency stability of atomic clocks based on coherent population trapping (CPT). In this technique, the CPT feilds are created by a modulated diode laser and a slow servo is used to

Continuous Light Shift Correction in Modulated CPT clocks

October 13, 2006
Author(s)
V Shah, Vladislav Gerginov, P Schwindt, Svenja A. Knappe, Leo W. Hollberg, John E. Kitching
We demonstrate a simple technique to significantly improve the long-term frequency stability of atomic clocks based on coherent population trapping (CPT). In this technique, the CPT feilds are created by a modulated diode laser and a slow servo is used to

Automatic Message Classification

October 11, 2006
Author(s)
Arthur Griesser
Rising automation means fewer humans, maintaining more equipment, which is exchanging more information. This information torrent is expected to increase even further, with the implementation of advanced process control and new information transfer

New Global Communication Process in Thermodynamics: Impact on Quality of Published Experimental Data

October 11, 2006
Author(s)
Michael D. Frenkel, Robert D. Chirico, Vladimir Diky, Chris D. Muzny, Qian Dong, K N. Marsh, John H. Dymond, William A. Wakeham, Stephen E. Stein, Erich Koenigsberger, Anthony R. Goodwin, Joe W. Magee, Michiel Thijssen, William M. Haynes, Suphat Watanasiri, Marco Satyro, Martin Schmidt, Andrew I. Johns, Gary R. Hardin
Thermodynamic data often represent a key resource in the search for new relationships between properties of chemical systems that constitutes the basis of the scientific discovery process. In addition, thermodynamic information is critical for development

Cationic Surfactants for the Control of Overfill Bumps in Cu Superfilling

October 10, 2006
Author(s)
Soo K. Kim, Daniel Josell, Thomas P. Moffat
Electroanalytical measurements and feature filling experiments have been conducted to study the effect of dodecyltrimethylammonium chloride (DTAC), a quaternary ammonium cationic surfactant, on Cu deposition in the presence of various combinations of

Determination of Levoglucosan in Particulate Matter Reference Materials

October 10, 2006
Author(s)
R Larsen, III, Michele M. Schantz, Stephen Wise
Source identification is critical for the effective management of air pollution. The ratio of levoglucosan (1,6-anhydro-B-D-glucose) to organic carbon has been used to identify and quantify the contribution of biomass combustion to the organic carbon

RF, Analog, and Mixed Signal Technologies for Communication ICs - An ITRS Perspective

October 10, 2006
Author(s)
Margaret Huang, Herbert S. Bennett, Julio Costa, Peter Cotrell, Anthony A. Immorlica, Jan-Erik Meuller, Charles E. Weitzel, Marco Racaneli, Hisashi Schichijo, Bin Zhao
The International Technology Roadmap for Semiconductor (ITRS) Radio Frequency and Analog/Mixed-Signal (RF and AMS) Wireless Technology Working Group (TWG) addresses device technologies for wireless communications covering both silicon-based and III-V
Displaying 34026 - 34050 of 74175
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