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Displaying records 21 to 29.
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21. Dynamics of coupled ultraslow optical solitons in a coherent four-state double-¿ system
Topic: Atomic Physics
Published: 8/15/2009
Authors: Lu Deng, Guoxiang Huang
Abstract: We present a systematical investigation, both analytical and numerical, on the dynamics of two nearly lossless and distortion-free weak nonlinear optical pulses in a cold, lifetime-broadened four-state double-Λ system via electromagnetically ...

22. Ratio of the Al^u+^ and Hg^u+^ Optical Clock Frequencies to 17 Decimal Places
Topic: Atomic Physics
Published: 8/25/2008
Authors: Wayne M Itano, Till P Rosenband, David Hume, P.O. Schmidt, Chin W. Chou, A. Brusch, Luca Lorini, Windell Oskay, Robert Eugene Drullinger, Sarah Bickman, Tara Michele Fortier, Jason Stalnaker, Scott A Diddams, William C Swann, Nathan Reynolds Newbury, David J Wineland, James C Bergquist
Abstract: Frequency standards (atomic clocks) based on narrow optical transitions in ^u27^Al^u+^ and ^u199^Hg^u+^ have been developed over the past several years at NIST. These two types of standards are both based on single ions confined in Paul traps, but di ...

23. Gain-assisted superluminal optical solitons at very low light intensity
Topic: Atomic Physics
Published: 1/30/2008
Authors: Lu Deng, Guoxiang Huang, C Hang
Abstract: We show the possibility of generating gain-assisted superluminal optical solitons in a room- temperature three-state active Raman gain medium. We demonstrate both analytically and numerically that under appropriate conditions a signal field of v ...

24. Propagation of shape-preserving optical pulses in inhomogeneously broadened multi-level systems
Topic: Atomic Physics
Published: 7/12/2006
Authors: Lu Deng, Guoxiang Huang, C Hang
Abstract: We study stable propagation of multiple shape-preserving optical pulses in an inhomogeneously broadened multi-level atomic medium. By analytically solving the Maxwell-Schr¿odinger equations governing the evolution of N coupled optical fields and ...

25. Highly efficient inelastic four-wave mixing using dual induced transparency and coherently prepared states
Topic: Atomic Physics
Published: 3/13/2006
Authors: Lu Deng, M. G. Payne
Abstract: We investigate a life time broadened and coherently prepared five-state system for multi-wave mixing processes. We show that very efficient wave mixing occurs, producing an unconventional mixing wave that has the characteristics of both conventi ...

26. Achieving induced transparency with one- and three-photon destructive interference in a two-mode, three-level, double-L system
Topic: Atomic Physics
Published: 1/28/2005
Authors: Lu Deng, M G Payne
Abstract: We show that in a two-mode, three-level, double-L system an efficient multiphoton destructive interference involving one- and three-photon pumping pathways occurs, leading to a unique type of induced transparency. Unlike the conventional electr ...

27. Ultraviolet single-photons on demand and entanglement of photons with a large frequency difference
Topic: Atomic Physics
Published: 12/20/2004
Authors: Lu Deng, Edward W Hagley, M. G. Payne, Ying Wu
Abstract: We investigate an efficient scheme for generating ultraviolet single-photons s,300 nmd. The scheme combines the highly efficient single-photon four-wave mixing scheme and fast developing quantum dot singlephotons on demand source technology. We ...

28. Achieving multi-frequency state entanglement with ultra-slow multi-wave mixing
Topic: Atomic Physics
Published: 1/1/2004
Authors: Y Wu, Lu Deng
Abstract: We propose a scheme to achieve the entanglement of N photon modes (frequency modes) with perfectly efficient ultraslow multiwave mixing in a cold atomic medium. In addition, the method provides an efficient approach to realizing frequency tunab ...

29. Quantum Entanglement of Fock States with Perfectly Efficient Ultraslow Single-Probe Photon Four-Wave Mixing
Topic: Atomic Physics
Published: 9/18/2003
Authors: Lu Deng, M. G. Payne
Abstract: We propose a method to achieve quantum entanglement of two Fock states with perfectly efficient, ultraslow propagation enhanced four-wave mixing. A cold atomic medium is illuminated with a twomode cw control laser to produce coherent mixtures o ...

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