5,243 research outputs found
Quantum and Classical Dynamics of a BEC in a Large-Period Optical Lattice
We experimentally investigate diffraction of a Rb-87 Bose-Einstein condensate
from a 1D optical lattice. We use a range of lattice periods and timescales,
including those beyond the Raman-Nath limit. We compare the results to quantum
mechanical and classical simulations, with quantitative and qualitative
agreement, respectively. The classical simulation predicts that the envelope of
the time-evolving diffraction pattern is shaped by caustics: singularities in
the phase space density of classical trajectories. This behavior becomes
increasingly clear as the lattice period grows.Comment: 7 pages, 6 figure
The new physiology of vision - Chapter XXVII. The colours of interference
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Science in Eastern Europe: II
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Some acoustical observations
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The new physiology of vision. Chapter XXXV. The faintest observable spectrum
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New methods in the study of light scattering - Part I. Basic ideas
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The new physiology of vision. Chapter XX. Superposition and masking of colours
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The diamond and its teachings
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The role of the retina in vision
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