Influence of the next-nearest neighbor and the boson–boson interactions on U-shaped, W-shaped profile and modulation instability gain spectra in a zig–zag optical lattice

2021 ◽  
pp. 1-14
Author(s):  
Alphonse Houwe ◽  
Souleymanou Abbagari ◽  
Serge Yamigno Doka ◽  
Mustafa Inc ◽  
Kofane Timoleon Crepin
Keyword(s):  
Optical Lattice ◽  
Nearest Neighbor ◽  
Modulation Instability ◽  
Gain Spectra

Quantum signature of breathers in 1D ultracold bosons in optical lattices involving next-nearest neighbor interactions

2017 ◽  
Vol 31 (20) ◽  
pp. 1750140 ◽  
Author(s):  
Z. I. Djoufack ◽  
A. Kenfack-Jiotsa ◽  
J.-P. Nguenang
Keyword(s):  
Energy Spectrum ◽  
Optical Lattice ◽  
Bound States ◽  
Optical Lattices ◽  
Nearest Neighbor ◽  
Laser Light ◽  
Energy Spectra ◽  
System Parameters ◽  
Quantum Breathers ◽  
Bosonic Atoms

The dynamics and the energy spectrum of an ultracold gas of bosonic atoms in an optical lattice can be described by a Bose–Hubbard model for which the system parameters can be controlled by laser light. We study by means of the perturbation theory in addition to the numerical diagonalization, the energy spectrum and the related features of the band structures of the ultracold bosons in optical lattices containing a few number of quanta interacting with next-nearest neighbor interactions (NNNI) modeled by the Bose–Hubbard Hamiltonian. The energy spectra of such system display the bound states signature, which are analyzed in the first Brillouin zone for different wave numbers. The finding, i.e., quantum breathers, shows that their probabilities’ weight depends on the wave vector. The influence of NNNI on both the probabilities’ amplitude and the correlation function is also realized in case of a system with a small number of sites, respectively.

scholarly journals Nearest-Neighbor Detection of Atoms in a 1D Optical Lattice by Fluorescence Imaging

2009 ◽  
Vol 102 (5) ◽  
Author(s):  
M. Karski ◽  
L. Förster ◽  
J. M. Choi ◽  
W. Alt ◽  
A. Widera ◽  
...  
Keyword(s):  
Fluorescence Imaging ◽  
Optical Lattice ◽  
Nearest Neighbor

scholarly journals Probing Nearest-Neighbor Correlations of Ultracold Fermions in an Optical Lattice

2011 ◽  
Vol 106 (14) ◽  
Author(s):  
Daniel Greif ◽  
Leticia Tarruell ◽  
Thomas Uehlinger ◽  
Robert Jördens ◽  
Tilman Esslinger
Keyword(s):  
Optical Lattice ◽  
Nearest Neighbor

scholarly journals Cold atoms in a rotating optical lattice with nearest-neighbor interactions

2010 ◽  
Vol 82 (6) ◽  
Author(s):  
Rashi Sachdeva ◽  
Sonika Johri ◽  
Sankalpa Ghosh
Keyword(s):  
Optical Lattice ◽  
Cold Atoms ◽  
Nearest Neighbor

scholarly journals Modulation Instability of Two-Dimensional Dipolar Bose-Einstein Condensate in a Deep Optical Lattice

2009 ◽  
Vol 116 (4) ◽  
pp. 519-521 ◽  
Author(s):  
A. Wöllert ◽  
G. Gligorić ◽  
M.M. Škorić ◽  
A. Maluckov ◽  
N. Raičević ◽  
...  
Keyword(s):  
Optical Lattice ◽  
Modulation Instability ◽  
Einstein Condensate ◽  
Two Dimensional ◽  
Bose Einstein Condensate ◽  
Bose Einstein

Observation of Superlattice Dislocations on Cube Planes in Ni3Al

1973 ◽  
Vol 31 ◽  
pp. 174-175 ◽  
Author(s):  
J. M. Oblak ◽  
W. H. Rand
Keyword(s):  
Nearest Neighbor ◽  
Antiphase Boundary ◽  
Nearest Neighbors ◽  
High Energy ◽  
Cross Slip ◽  
Octahedral Plane ◽  
Trapping Mechanism ◽  
Slip Traces

The energy of an a/2 <110> shear antiphase. boundary in the Ll2 expected to be at a minimum on {100} cube planes because here strue ture is there is no violation of nearest-neighbor order. The latter however does involve the disruption of second nearest neighbors. It has been suggested that cross slip of paired a/2 <110> dislocations from octahedral onto cube planes is an important dislocation trapping mechanism in Ni3Al; furthermore, slip traces consistent with cube slip are observed above 920°K.Due to the high energy of the {111} antiphase boundary (> 200 mJ/m2), paired a/2 <110> dislocations are tightly constricted on the octahedral plane and cannot be individually resolved.

Application of Lattice Imaging Techniques to Amorphous Films

1975 ◽  
Vol 33 ◽  
pp. 8-9
Author(s):  
S. R. Herd ◽  
P. Chaudhari
Keyword(s):  
Nearest Neighbor ◽  
Random Network ◽  
Imaging Techniques ◽  
Network Models ◽  
Accurate Method ◽  
Direct Transmission ◽  
Lattice Imaging ◽  
Transmission Electron ◽  
Lattice Planes ◽  
Nearest Neighbor Distances

Electron diffraction and direct transmission have been used extensively to study the local atomic arrangement in amorphous solids and in particular Ge. Nearest neighbor distances had been calculated from E.D. profiles and the results have been interpreted in terms of the microcrystalline or the random network models. Direct transmission electron microscopy appears the most direct and accurate method to resolve this issue since the spacial resolution of the better instruments are of the order of 3Å. In particular the tilted beam interference method is used regularly to show fringes corresponding to 1.5 to 3Å lattice planes in crystals as resolution tests.

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