Binary Bosonic Mixtures with Pair Hopping in Synthetic Dimension: Phase Transitions and Demixing Effects

• DOI: 10.48550/arxiv.2502.01125
• Publication Date: 2025-02-03
• Authors: Chenrong Liu; Zhi Lin
• Keywords: Quantum Gases (cond-mat.quant-gas); FOS: Physical sciences; Condensed Matter - Quantum Gases

We employ the cluster Gutzwiller mean-field method to investigate ground-state phase diagrams and demixing effects in binary boson mixtures with pair hopping synthetic dimensions. Our study reveals two novel interspecies paired superfluid phases: super-counter-fluid (PSCF) phase, featuring pairs of particles one species holes other, SCF* which combines PSCF (SCF) orders. These phases provide new insights into XY ferromagnet states from a pseudo-spin perspective, corresponding different depending on particle filling. also identify quantum quadruple critical point interexchange asymmetric case. Importantly, we demonstrate that mixed-demixed is phase-dependent due pairing hopping, differing normal two-component bosonic systems. Experimental schemes observe these are proposed.