The Experts below are selected from a list of 34404 Experts worldwide ranked by ideXlab platform
Mark Hoefer - One of the best experts on this subject based on the ideXlab platform.
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generation of dark bright soliton trains in superfluid superfluid counterflow
Physical Review Letters, 2011Co-Authors: Chris Hamner, Jiajia Chang, Peter Engels, Mark HoeferAbstract:The dynamics of two penetrating superfluids exhibit an intriguing variety of nonlinear effects. Using two distinguishable components of a Bose-Einstein condensate, we investigate the counterflow of two superfluids in a Narrow Channel. We present the first experimental observation of trains of dark-bright solitons generated by the counterflow. Our observations are theoretically interpreted by three-dimensional numerical simulations for the coupled Gross-Pitaevskii equations and the analysis of a jump in the two relatively flowing components' densities. Counterflow-induced modulational instability for this miscible system is identified as the central process in the dynamics.
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generation of dark bright soliton trains in superfluid superfluid counterflow
Physical Review Letters, 2011Co-Authors: Chris Hamner, Jiajia Chang, Peter Engels, Mark HoeferAbstract:The dynamics of two penetrating superfluids exhibit an intriguing variety of nonlinear effects. Using two distinguishable components of a Bose-Einstein condensate, we investigate the counterflow of two superfluids in a Narrow Channel. We present the first experimental observation of trains of dark-bright solitons generated by the counterflow. Our observations are theoretically interpreted by three-dimensional numerical simulations for the coupled Gross-Pitaevskii equations and the analysis of a jump in the two relatively flowing components' densities. Counterflow-induced modulational instability for this miscible system is identified as the central process in the dynamics.
M A Moore - One of the best experts on this subject based on the ideXlab platform.
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glasslike behavior of a hard disk fluid confined to a Narrow Channel
Physical Review E, 2016Co-Authors: Joshua F Robinson, M J Godfrey, M A MooreAbstract:Disks moving in a Narrow Channel have many features in common with the glassy behavior of hard spheres in three dimensions. In this paper we study the caging behavior of the disks that sets in at characteristic packing fraction ϕ(d). Four-point overlap functions similar to those studied when investigating dynamical heterogeneities have been determined from event-driven molecular dynamics simulations and the time-dependent dynamical length scale has been extracted from them. The dynamical length scale increases with time and, on the equilibration time scale, it is proportional to the static length scale associated with the zigzag ordering in the system, which grows rapidly above ϕ(d). The structural features responsible for the onset of caging and the glassy behavior are easy to identify as they show up in the structure factor, which we have determined exactly from the transfer-matrix approach.
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static and dynamical properties of a hard disk fluid confined to a Narrow Channel
Physical Review E, 2014Co-Authors: M J Godfrey, M A MooreAbstract:The thermodynamic properties of disks moving in a Channel sufficiently Narrow that they can collide only with their nearest neighbors can be solved exactly by determining the eigenvalues and eigenfunctions of an integral equation. Using it, we have determined the correlation length ? of this system. We have developed an approximate solution which becomes exact in the high-density limit. It describes the system in terms of defects in the regular zigzag arrangement of disks found in the high-density limit. The correlation length is then effectively the spacing between the defects. The time scales for defect creation and annihilation are determined with the help of transition-state theory, as is the diffusion coefficient of the defects, and these results are found to be in good agreement with molecular dynamics simulations. On compressing the system with the Lubachevsky-Stillinger procedure, jammed states are obtained whose packing fractions ?J are a function of the compression rate ?. We find a quantitative explanation of this dependence by making use of the Kibble-Zurek hypothesis. We have also determined the point-to-set length scale ?PS for this system. At a packing fraction ? close to its largest value ?max, ?PS has a simple power law divergence, ?PS?1/(1??/?max), while ? diverges much faster, ln(?)?1/(1??/?max).
Chris Hamner - One of the best experts on this subject based on the ideXlab platform.
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generation of dark bright soliton trains in superfluid superfluid counterflow
Physical Review Letters, 2011Co-Authors: Chris Hamner, Jiajia Chang, Peter Engels, Mark HoeferAbstract:The dynamics of two penetrating superfluids exhibit an intriguing variety of nonlinear effects. Using two distinguishable components of a Bose-Einstein condensate, we investigate the counterflow of two superfluids in a Narrow Channel. We present the first experimental observation of trains of dark-bright solitons generated by the counterflow. Our observations are theoretically interpreted by three-dimensional numerical simulations for the coupled Gross-Pitaevskii equations and the analysis of a jump in the two relatively flowing components' densities. Counterflow-induced modulational instability for this miscible system is identified as the central process in the dynamics.
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generation of dark bright soliton trains in superfluid superfluid counterflow
Physical Review Letters, 2011Co-Authors: Chris Hamner, Jiajia Chang, Peter Engels, Mark HoeferAbstract:The dynamics of two penetrating superfluids exhibit an intriguing variety of nonlinear effects. Using two distinguishable components of a Bose-Einstein condensate, we investigate the counterflow of two superfluids in a Narrow Channel. We present the first experimental observation of trains of dark-bright solitons generated by the counterflow. Our observations are theoretically interpreted by three-dimensional numerical simulations for the coupled Gross-Pitaevskii equations and the analysis of a jump in the two relatively flowing components' densities. Counterflow-induced modulational instability for this miscible system is identified as the central process in the dynamics.
Peter Engels - One of the best experts on this subject based on the ideXlab platform.
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generation of dark bright soliton trains in superfluid superfluid counterflow
Physical Review Letters, 2011Co-Authors: Chris Hamner, Jiajia Chang, Peter Engels, Mark HoeferAbstract:The dynamics of two penetrating superfluids exhibit an intriguing variety of nonlinear effects. Using two distinguishable components of a Bose-Einstein condensate, we investigate the counterflow of two superfluids in a Narrow Channel. We present the first experimental observation of trains of dark-bright solitons generated by the counterflow. Our observations are theoretically interpreted by three-dimensional numerical simulations for the coupled Gross-Pitaevskii equations and the analysis of a jump in the two relatively flowing components' densities. Counterflow-induced modulational instability for this miscible system is identified as the central process in the dynamics.
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generation of dark bright soliton trains in superfluid superfluid counterflow
Physical Review Letters, 2011Co-Authors: Chris Hamner, Jiajia Chang, Peter Engels, Mark HoeferAbstract:The dynamics of two penetrating superfluids exhibit an intriguing variety of nonlinear effects. Using two distinguishable components of a Bose-Einstein condensate, we investigate the counterflow of two superfluids in a Narrow Channel. We present the first experimental observation of trains of dark-bright solitons generated by the counterflow. Our observations are theoretically interpreted by three-dimensional numerical simulations for the coupled Gross-Pitaevskii equations and the analysis of a jump in the two relatively flowing components' densities. Counterflow-induced modulational instability for this miscible system is identified as the central process in the dynamics.
Jiajia Chang - One of the best experts on this subject based on the ideXlab platform.
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generation of dark bright soliton trains in superfluid superfluid counterflow
Physical Review Letters, 2011Co-Authors: Chris Hamner, Jiajia Chang, Peter Engels, Mark HoeferAbstract:The dynamics of two penetrating superfluids exhibit an intriguing variety of nonlinear effects. Using two distinguishable components of a Bose-Einstein condensate, we investigate the counterflow of two superfluids in a Narrow Channel. We present the first experimental observation of trains of dark-bright solitons generated by the counterflow. Our observations are theoretically interpreted by three-dimensional numerical simulations for the coupled Gross-Pitaevskii equations and the analysis of a jump in the two relatively flowing components' densities. Counterflow-induced modulational instability for this miscible system is identified as the central process in the dynamics.
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generation of dark bright soliton trains in superfluid superfluid counterflow
Physical Review Letters, 2011Co-Authors: Chris Hamner, Jiajia Chang, Peter Engels, Mark HoeferAbstract:The dynamics of two penetrating superfluids exhibit an intriguing variety of nonlinear effects. Using two distinguishable components of a Bose-Einstein condensate, we investigate the counterflow of two superfluids in a Narrow Channel. We present the first experimental observation of trains of dark-bright solitons generated by the counterflow. Our observations are theoretically interpreted by three-dimensional numerical simulations for the coupled Gross-Pitaevskii equations and the analysis of a jump in the two relatively flowing components' densities. Counterflow-induced modulational instability for this miscible system is identified as the central process in the dynamics.
