Orbital Optical Raman Lattice

• URL: http://arxiv.org/abs/2412.04009v2
• Date: Thu, 12 Dec 2024 06:04:51 GMT
• Title: Orbital Optical Raman Lattice
• Authors: Zhi-Hao Huang, Kou-Han Ma, Bao-Zong Wang, W. Vincent Liu, Xiong-Jun Liu,
• Abstract summary: We study exotic high-orbital Bose condensates with Raman-induced SOC in a square lattice.<n>We find that both the SOC and p-orbital interactions influence the condensed state of bosons.<n>Our findings may inspire a new avenue for exploring exotic SOC and high-orbital physics in optical lattices.
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• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The spin and orbital are two basic degrees of freedom, which play significant roles in exploring exotic quantum phases in optical lattices with synthetic spin-orbit coupling (SOC) and high orbital bands, respectively. Here, we propose an orbital optical Raman lattice to study exotic high-orbital Bose condensates with Raman-induced SOC in a square lattice. We find that both the SOC and p-orbital interactions influence the condensed state of bosons. Their interplay results in two novel high-orbital many-body quantum phases: the uniform angular momentum superfluid phase, which features a global topological chiral orbital current, and the two-dimensional spin-orbital supersolid phase, which is characterized by the spin and orbital angular momentum density wave patterns. The former has topological Bogoliubov excitations characterized by a uniform Chern number, while the spin-orbital supersolid phase hosts topological excitations with opposite Chern numbers which respectively protect the chiral and antichiral edge modes in the neighboring supersolid clusters. Our findings may inspire a new avenue for exploring exotic SOC and high-orbital physics in optical lattices, and shall also advance the experimental progress of novel supersolids in higher dimensions.

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