Frustrated Bose-Einstein condensates with non-collinear orbital ordering

Abstract

We investigate the unconventional Bose-Einstein condensations (BEC) with the orbital degree of freedom in the 3D cubic optical lattice, which give rise to various exotic features absent in conventional scalar and spinor BECs. Orbital angular momentum moments are formed on lattice sites breaking time-reversal symmetry spontaneously. Furthermore, they exhibit orbital frustrations and develop a chiral ordering selected by the "order-from-disorder" mechanism.

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Cited by in corpus (6)

• Physics of higher orbital bands in optical lattices: a review
• XYZ quantum Heisenberg models with p-orbital bosons
• Massless collective excitations in frustrated multi-band superconductors
• Chiral orbital magnetism of $p$-orbital bosons in optical lattices
• Four-coloring model and frustrated superfluidity in the diamond lattice
• Phase diagram of strongly attractive $p$-orbital fermions on optical lattices