Reply to 'Comment on 'Nonlinear band structure in Bose-Einstein condensates: Nonlinear Schroedinger equation with a Kronig-Penney potential'

Journal Article · Sun Jul 15 00:00:00 EDT 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.76.017602· OSTI ID:21011350

Seaman, B T; Holland, M J ^[1]; Carr, L D ^[2]

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1. JILA, National Institute of Standards and Technology and Department of Physics, University of Colorado, Boulder, Colorado 80309-0440 (United States)
2. Department of Physics, Colorado School of Mines, Golden, Colorado 80401 (United States)

In response to Danshita and Tsuchiya's comment on our work on nonlinear band theory, we show that the size of the region of the swallowtail with a negative effective mass is inversely proportional to the interaction strength, i.e., for large interaction strengths, the region becomes negligibly small. We explain why the appearance of swallowtails is not related to superfluidity, but instead to a more universal nonlinear feature valid for both signs of the underlying atomic interactions: period doubling.

• OSTI ID: 21011350
• Journal Information: Physical Review. A, Vol. 76, Issue 1; Other Information: DOI: 10.1103/PhysRevA.76.017602; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BAND THEORY
BOSE-EINSTEIN CONDENSATION
EFFECTIVE MASS
INTERACTIONS
NONLINEAR PROBLEMS
POTENTIALS
SCHROEDINGER EQUATION
SUPERFLUIDITY
WAVE FUNCTIONS