Complex and real unconventional Bose-Einstein condensations in high orbital bands

Abstract

We perform the theoretical study on the unconventional Bose-Einstein condensations (UBEC) in the high bands of optical lattices observed by Hemmerich's group. These exotic states are characterized by complex-valued condensate wavefunctions with nodal points, or real-valued ones with nodal lines, thus are beyond the {\it "no-node"} paradigm of the conventional BECs. A quantum phase transition is driven by the competition between the single particle band and interaction energies. The complex UBECs spontaneously break time-reversal symmetry, exhibiting a vortex-antivortex lattice structure.

4.2 pages

References in corpus (12)

• Flat bands and Wigner crystallization in the honeycomb optical lattice
• A lattice of double wells for manipulating pairs of cold atoms
• Orbital superfluidity in the $P$-band of a bipartite optical square lattice
• State preparation and dynamics of ultracold atoms in higher lattice orbitals
• Unconventional Bose-Einstein Condensations Beyond the "No-node" Theorem
• Prediction of quantum stripe ordering in optical lattices
• Incommensurate superfluidity of bosons in a double-well optical lattice
• Nonlinear tunneling of BEC in an optical lattice: signatures of quantum collapse and revival
• Condensates induced by interband coupling in a double-well lattice
• Effective action approach to the p-band Mott insulator and superfluid transition
• Quantum switching at a mean-field instability of a Bose-Einstein condensate in an optical lattice
• Dynamical instability and loss of p-band bosons in optical lattices

Cited by in corpus (31)

• Non-standard Hubbard models in optical lattices: a review
• Topological orbital ladders
• Unconventional states of bosons with synthetic spin-orbit coupling
• Physics of higher orbital bands in optical lattices: a review
• Topologically induced avoided band crossing in an optical chequerboard lattice
• Interaction-induced chiral p_x \pm i p_y superfluid order of bosons in an optical lattice
• Observing Chiral Superfluid Order by Matter-Wave Interference
• Interaction Quench Induced Multimode Dynamics of Finite Atomic Ensembles
• Time reversal symmetry breaking of $p$-orbital bosons in a one-dimensional optical lattice
• Orbital optical lattices with bosons
• Formation and decay of Bose-Einstein condensates in an excited band of a double-well optical lattice
• Exotic phases of interacting p-band bosons
• Formation and detection of a chiral orbital Bose liquid in an optical lattice
• Geometry-dependent skin effect and anisotropic Bloch oscillations in a non-Hermitian optical lattice
• Multi-orbital bosons in bipartite optical lattices
• Loop Structure Stability of a Double-Well-Lattice BEC
• The nonlinear Dirac equation in Bose-Einstein condensates: Superfluid fluctuations and emergent theories from relativistic linear stability equations
• High-order Time-Reversal Symmetry Breaking Normal State
• Frustrated Bose-Einstein condensates with non-collinear orbital ordering
• Phase-Sensitive Detection for Unconventional Bose-Einstein Condensations
• Renormalization group analysis of $p$-orbital Bose-Einstein condensates in a square optical lattice
• Stability of $p$-orbital Bose-Einstein condensates in optical checkerboard and square lattices
• One-dimensional s-p superlattice
• Unconventional Bose-Einstein Condensation in a System of Two-species Bosons in the $p$-orbital Bands of a Bipartite Lattice
• Bosons condensed in two modes with flavour-changing interaction
• Phonon-like excitations in the two-state Bose-Hubbard model
• Magnetic phases of orbital bipartite optical lattices
• Bose-Einstein condensation in a frustrated triangular optical lattice
• State diagram and the phase transition of $p$-bosons in a square bi-partite optical lattice
• Critical behavior of a chiral superfluid in a bipartite square lattice
• Hidden chiral symmetry protected $\mathbb{Z}\oplus \mathbb{Z}$ topological insulators in a ladder dimer model