Quantized motion of cold cesium atoms in two- and three-dimensional optical potentials

Grynberg, G.; Lounis, Brahim; Verkerk, P.; Courtois, J.-Y.; Salomon, Christophe

doi:10.1103/physrevlett.70.2249

Cited by 312 publications

(184 citation statements)

References 15 publications

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“…Honeycomb optical lattices were realized using three interfering traveling laser beams [38][39][40][41][42]. The staggered sublattice potential can be precisely adjusted.…”

mentioning

confidence: 99%

Bosonic edge states in gapped honeycomb lattices

et al. 2016

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Using quantum Monte Carlo simulations of bosons in gapped honeycomb lattices, we prove the existence of bosonic edge states. For single-layer honeycomb lattices, bosonic edge states can be created, cross the gap, and merge into bulk states using an on-site potential applied to the outermost sites of the boundary. On the bilayer honeycomb lattice, bosonic edge states traversing the gap at half filling are demonstrated. The topological origin of the bosonic edge states is discussed in terms of the pseudo-Berry curvature. The results will simulate experimental studies of these exotic bosonic edge states using ultracold bosons trapped in honeycomb optical lattices. Introduction.-Many important phenomena in condensed matter physics share the same intriguing feature, namely, the presence of edge states in the gap. Well-known examples include the quantum Hall effect (QHE), topological insulators, and graphene systems [1][2][3][4]. The appearance of an edge state is the consequence of the non-trivial topological properties of the bulk band. Edge states have been created in various systems such as quantum wells and graphene [5][6][7][8]; the existence of edge states constitutes a central motivation for studying these kinds of materials. Edge states are perfectly conducting channels and play an important role in electronic transport [9]. Edge states can be engineered to create onedimensional topological superconductors, which support localized Majorana fermions [10].

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“…Honeycomb optical lattices were realized using three interfering traveling laser beams [38][39][40][41][42]. The staggered sublattice potential can be precisely adjusted.…”

mentioning

confidence: 99%

Bosonic edge states in gapped honeycomb lattices

et al. 2016

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“…1). More involved diagnostics will be necessary to study the quantum degenerate regime, such as stimulated Raman spectroscopy [31][32][33], which we leave for future work.…”

Section: Experimental Results and Comparison To Scaling Lawsmentioning

confidence: 99%

Evaporative cooling of a small number of atoms in a single-beam microscopic dipole trap

et al. 2013

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We demonstrate experimentally the evaporative cooling of a few hundred rubidium 87 atoms in a single-beam microscopic dipole trap. Starting from 800 atoms at a temperature of 125 µK, we produce an unpolarized sample of 40 atoms at 110 nK, within 3 s. The phase-space density at the end of the evaporation reaches unity, close to quantum degeneracy. The gain in phase-space density after evaporation is 10 3 . We find that the scaling laws used for much larger numbers of atoms are still valid despite the small number of atoms involved in the evaporative cooling process. We also compare our results to a simple kinetic model describing the evaporation process and find good agreement with the data.

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“…In optical lattices, the hexagonal structure can be created by appropriate laser beam configurations. One possibility is to interfere three coplanar beams of the same frequency and polarization having wavevectors k i , i = 1, 2, 3, oriented at an angle of 2p/3 with respect to one another [15,16]. For wavevectors of equal magnitude k L and the configuration of figure 2b, the resultant optical lattice has reciprocal primitive vectors…”

Section: Phil Trans R Soc a (2012)mentioning

confidence: 99%

A glimpse of quantum phenomena in optical lattices

Vishveshwara

2012

Phil. Trans. R. Soc. A.

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Optical lattices in cold atomic systems offer an excellent setting for realizing quantum condensed matter phenomena. Here, a glimpse of such a setting is provided for the nonspecialist. Some basic aspects of cold atomic gases and optical lattices are reviewed. Quantum many-body physics is explored in the case of interacting bosons on a lattice. Quantum behaviour in the presence of a potential landscape is examined for three different cases: a hexagonal lattice potential, a quasi-periodic potential and a disorder potential.

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Quantized motion of cold cesium atoms in two- and three-dimensional optical potentials

Cited by 312 publications

References 15 publications

Bosonic edge states in gapped honeycomb lattices

Bosonic edge states in gapped honeycomb lattices

Evaporative cooling of a small number of atoms in a single-beam microscopic dipole trap

A glimpse of quantum phenomena in optical lattices

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