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RESEARCH PRODUCT
Sub-Diffractive Band-Edge Solitons in Bose-Einstein Condensates in Periodic Potentials
Germa~¡n J. De ValcárcelKestutis StaliunasRamon Herrerosubject
PhysicsDiffractionCondensed matter physicsBand gapFOS: Physical sciencesPhysics::OpticsAtomic masslaw.inventionCondensed Matter - Other Condensed MatterlawLattice (order)Matter waveElectronic band structureBose–Einstein condensateOther Condensed Matter (cond-mat.other)description
A new type of matter wave diffraction management is presented that leads to sub-diffractive soliton-like structures. The proposed management technique uses two counter-moving, identical periodic potentials (e.g. optical lattices). For suitable lattice parameters a novel type of atomic band-gap structure appears in which the effective atomic mass becomes infinite at the lowest edge of an energy band. This way normal matter-wave diffraction (proportional to the square of the atomic momentum) is replaced by fourth-order diffraction, and hence the evolution of the system becomes sub-diffractive.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2006-06-20 |