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Topic Area: Physics

Displaying records 81 to 90 of 733 records.
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81. Nonequilibrium dynamics of arbitrary-range Ising models with decoherence: An exact analytic solution
Topic: Physics
Published: 4/3/2013
Authors: John J Bollinger, Michael Foss-Feig, Kaden R. Hazzard, Ana Maria Rey
Abstract: Understanding the interplay between interactions and decoherence in many-body systems is of fundamental importance in quantum physics: Decoherence can degrade correlations, but can also give rise to a variety of rich dynamical and steady-state beha ...

82. Arbitrary waveform generator for quantum information processing with trapped ions
Topic: Physics
Published: 3/20/2013
Authors: Ryan Steven Bowler, Ulrich J. Warring, Joseph Wright Britton, J. M. Amini
Abstract: Ions confined in a multi-electrode trap design have been proposed as a possible basis for quantum information processing. This scheme involves transporting ions between spatially distinct locations using time varying electric potentials combined with ...

83. A frequency-stabilized Yb:KYW femtosecond laser frequency comb and its application to low-phase noise microwave generation
Topic: Physics
Published: 3/16/2013
Authors: Scott A Diddams, Stephanie Meyer, Tara Michele Fortier, Steve Lecomte
Abstract: We present an optically-stabilized Yb:KYW fs-laser frequency comb. We use an f-2f nonlinear interferometer to measure the carrier envelope offset frequency (f^d0^) and the heterodyne beatnote between the comb and a stable CW laser at 1068 nm to detec ...

84. Exploiting shot noise correlations in the photodetection of ultrashort optical pulse trains
Topic: Physics
Published: 3/10/2013
Authors: Franklyn J Quinlan, Tara Michele Fortier, Haifeng (Haifeng) Jiang, Archita Hati, Craig W Nelson, Yang Fu, Joe Campbell, Scott A Diddams
Abstract: Photocurrent shot noise represents the fundamental quantum limit of amplitude, phase and timing measurements of optical signals. It is generally assumed that non-classical states of light must be employed to alter the standard, time-invariant shot no ...

85. Shifts of optical frequency references based on spectral hole burning in Eu3+:Y2SiO5
Topic: Physics
Published: 3/6/2013
Authors: David R Leibrandt, Michael J. (Michael) Thorpe, Till P Rosenband
Abstract: Spectral hole burning laser frequency stabilization in Eu3+:Y2SiO5 is performed in a cryogenic environment with high temperature stability and low levels of vibration. Several properties of Eu3+:Y2SiO5 spectral holes are measured, including magnetic ...

86. Atom numbers in magneto-optic traps with millimeter scale laser beams
Topic: Physics
Published: 2/22/2013
Authors: Gregory William Hoth, Elizabeth A Donley, John E Kitching
Abstract: We measure the number of atoms, N, that can be trapped in a conventional vapor cell MOT using beams that have a diameter d in the range 1-5 mm. We show that the N \propto d^u3.6^ scaling law observed for larger MOTs is a robust approximation for opti ...

87. Cavity-stabilized laser with acceleration sensitivity below 10^u-12^/g^u-1^
Topic: Physics
Published: 2/21/2013
Authors: David R Leibrandt, James C Bergquist, Till P Rosenband
Abstract: We characterize the frequency-sensitivity of a cavity-stabilized laser to inertial forces and temperature fluctuations, and perform real-time feed-forward to correct for these sources of noise. We measure the sensitivity of the cavity to linear acce ...

88. Use of the Grand Canonical Transition-Matrix Monte Carlo Method to Model Gas Adsorption in Porous Materials
Topic: Physics
Published: 2/21/2013
Authors: Daniel W Siderius, Vincent K Shen
Abstract: We present grand canonical transition-matrix Monte Carlo (GC-TMMC) as an efficient method for simulating gas adsorption processes, with particular emphasis on subcritical gas adsorption in which capillary phase transitions are present. As in other a ...

89. A One-Kilogram Quartz Resonator as a Mass Standard
Topic: Physics
Published: 2/1/2013
Authors: David Allan Howe, J Vig
Abstract: The unit of mass, the kilogram, is the last remaining SI base unit defined by an artifactŠ [1]. This artifact, the primary mass standard, suffers from long term instabilities that are neither well understood, nor easily monitored [2]. A mass stand ...

90. Techniques for microwave near-field quantum control of trapped ions
Topic: Physics
Published: 1/31/2013
Authors: Ulrich J. Warring, C. Ospelkaus, Yves Colombe, Kenton R. Brown, Jason Amini, M Carsjens, Dietrich G Leibfried, David J Wineland
Abstract: In Ospelkaus et al. [Nature 476, 181 (2011)] a microwave near-field quantum control of spin and motional degrees of freedom of one and two 25Mg+ ions enabled two-ion entanglement. In this report, we extend on the description of the experimental setup ...

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