Dynamical instability and loss of p-band bosons in optical lattices

Abstract

We study how the bosonic atoms on the excited p-band of an optical lattice are coupled to the lowest s-band and the 2nd excited d-band. We find that in some parameter regimes the atom-atom interactions can cause a dynamical instability of the p-band atoms towards decay to the s- and d-bands. Furthermore, even when dynamical instability is not expected s- and d-bands can become substantially populated.

7 figures, minor changes to the earlier version

References in corpus (6)

• Many-Body Physics with Ultracold Gases
• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• Ultracold atomic gases in optical lattices: mimicking condensed matter physics and beyond
• State preparation and dynamics of ultracold atoms in higher lattice orbitals
• Incommensurate superfluidity of bosons in a double-well optical lattice
• Strongly Interacting Atoms and Molecules in a 3D Optical Lattice

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• Complex and real unconventional Bose-Einstein condensations in high orbital bands
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• Bath-induced band decay of a Hubbard lattice gas
• Formation and decay of Bose-Einstein condensates in an excited band of a double-well optical lattice
• Stability of $p$-orbital Bose-Einstein condensates in optical checkerboard and square lattices
• Observation of Chiral-Mode Domains in a Frustrated XY Model on Optical Triangular Lattices
• Unconventional Bose-Einstein Condensation in a System of Two-species Bosons in the $p$-orbital Bands of a Bipartite Lattice
• Loading of bosons in optical lattices into the p band
• Phase diagram of strongly attractive $p$-orbital fermions on optical lattices