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Displaying records 541 to 550 of 789 records.
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541. Preparation of nanocomposite plasmonic films made from cellulose nanocrystals or mesoporous silica decorated with unidirectionally aligned gold nanorods
Topic: Physics
Published: 4/11/2014
Authors: Michael Campbell, Qingkun Liu, Aric Warner Sanders, Julian Evans, Ivan I. Smalyukh
Abstract: Using liquid crystalline self-assembly of cellulose nanocrystals, we achieve long-range alignment of anisotropic metal nanoparticles in colloidal nanocrystal dispersions that are then used to deposit thin structured films with ordering features h ...

542. Preserving quantum coherence using optimized open-loop control techniques
Topic: Physics
Published: 5/16/2010
Authors: Michael J. Biercuk, Hermann Uys, Aaron Vandevender, Nobuyasu Shiga, Wayne M Itano, John J Bollinger
Abstract: We describe experimental and theoretical studies of open-loop quantum control techniques known as dynamical decoupling (DD) for the suppression of decoherence-induced errors in quantum systems. Our experiments on trapped atomic ion qubits demonstra ...

543. Probing interactions between ultracold fermions
Topic: Physics
Published: 4/17/2009
Authors: G K. Campbell, M M. Boyd, J W Thomsen, M J Martin, S Blatt, M D Swallows, Travis L Nicholson, Tara Michele Fortier, Christopher W Oates, Scott A Diddams, Nathan D. Lemke, Pascal Naidon, Paul S Julienne, Jun Ye, Andrew D Ludlow
Abstract: At ultracold temperatures, the Pauli exclusion principle suppresses collisions between identical fermions. This has motivated the development of atomic clocks using fermionic isotopes. However, by probing an optical clock transition with thousands ...

544. Progress Toward Corrugated Feed Horn Arrays in Silicon
Topic: Physics
Published: 12/16/2009
Authors: Joseph Wright Britton, Ki W. Yoon, James A Beall, Daniel T Becker, Hsiao-Mei Cho, Gene C Hilton, Michael D. Niemack, Kent D Irwin
Abstract: We are developing monolithic arrays of corrugated feed horns fabricated in silicon for dual-polarization single mode operation at 90, 145 and 220 GHz. The arrays consist of hundreds of platelet feed horns assembled from gold coated stacks of micromac ...

545. Progress Toward a Cryogenic ^u199^Hg^u+^ Ion Frequency Standard
Topic: Physics
Published: 6/27/1994
Authors: M E Poitzsch, James C Bergquist, Wayne M Itano, David J Wineland

546. Progress Towards ^u199^Hg^u+^ Optical Frequency Standard
Topic: Physics
Published: 4/13/1999
Authors: R J Rafac, B C Young, F C Cruz, J A Beall, James C Bergquist, Wayne M Itano, David J Wineland

547. Progress at NIST in measuring the D-lines of Li isotopes using an optical frequency comb
Topic: Physics
Published: 12/20/2010
Authors: Clayton Simien, Samuel Middleton Brewer, Joseph N Tan, John D Gillaspy, Craig J Sansonetti
Abstract: Precise spectroscopic experiments with light atoms can provide information about nuclear properties that are very difficult to obtain in electron scattering experiments. For example, relative nuclear radii of low-Z isotopes can be determined accurat ...

548. Progress on a Cryogenic Linear Trap for ^u199^Hg^u+^ Ions
Topic: Physics
Published: 5/31/1995
Authors: J D Miller, M E Poitzsch, F C Cruz, D J Berkeland, James C Bergquist, Wayne M Itano, David J Wineland

549. Progress on a Portable Rubidium Fountain Frequency Standard
Topic: Physics
Published: 11/16/2009
Authors: Paul David Kunz, Thomas Patrick Heavner, Steven R Jefferts
Abstract: We are developing a transportable laser-cooled rubidium (Rb) atomic fountain frequency standard. We have a complete optical package, and have recently shown cooled, launched, and detected atoms. Additionally, a new physics package has been designed ...

550. Progress on a portable rubidium fountain frequency standard
Topic: Physics
Published: 12/1/2008
Authors: Paul David Kunz, Thomas Patrick Heavner, Steven R Jefferts
Abstract: We are developing a simple and transportable laser-cooled rubidium (Rb) atomic fountain frequency standard. The optical package for this system uses DFB (distributed feedback) diode lasers and a frequency offset locking scheme to generate the optica ...

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