Atomic matter of non-zero momentum Bose-Einstein condensation and orbital current order

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dc.creatorLiu, W. Vincent
dc.creatorWu, Congjun
dc.date2006-01-19
dc.date2006-06-15
dc.date.accessioned2026-07-07T06:57:40Z
dc.date.available2026-07-07T06:57:40Z
dc.descriptionThe paradigm of Bose-Einstein condensation has been associated with zero momentum to which a macroscopic fraction of bosons condense. Here we propose a new quantum state where bosonic alkali-metal atoms condense at non-zero momenta, defying the paradigm. This becomes possible when the atoms are confined in the p-orbital Bloch band of an optical lattice rather than the usual s-orbital. The new condensate simultaneously forms an order of transversely staggered orbital currents, reminiscent of orbital antiferromagnetism or d-density wave in correlated electronic systems but different in fundamental ways. We discuss several approaches of preparing atoms to the p-orbital and propose an ``energy blocking'' mechanism by Feshbach resonance to protect them from decaying to the lowest s-orbital. Such a model system seems very unique and novel to atomic gases. It suggests a new concept of quantum collective phenomena of no prior example from solid state materials.
dc.description10 pages, 7 figures (with one in Appendix); added references and reorganized appendices in REVTeX
dc.identifierhttps://arxiv.org/abs/cond-mat/0601432
dc.identifierhttp://arxiv.org/abs/cond-mat/0601432
dc.identifierPhys. Rev. A 74, 013607 (2006)
dc.identifierdoi:10.1103/PhysRevA.74.013607
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/107055
dc.subjectOther Condensed Matter
dc.subjectStrongly Correlated Electrons
dc.titleAtomic matter of non-zero momentum Bose-Einstein condensation and orbital current order
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