Emergent supercounterfluid and quantum phase diagram of two-component interacting bosons in one-dimensional optical lattice
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arXiv
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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866916776943550464 |
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| author | He, Saisai Liu, Yang Xi, Bin Luo, Hong-Gang Luo, Qiang Zhao, Jize |
| author_facet | He, Saisai Liu, Yang Xi, Bin Luo, Hong-Gang Luo, Qiang Zhao, Jize |
| contents | Motivated by a recent experiment that realizes nearest-neighbor dipolar couplings in an optical lattice [C. Lagoin, $\textit{et al.}$, Nature $\textbf{609}$, 485 (2022)], we study a one-dimensional version of the two-component extended Bose-Hubbard model via the density-matrix renormalization group method. By using the nearest-neighbor and on-site interaction parameters from the experiment, we start by mapping the quantum phase diagram in the hopping parameters $t_{A}\mbox{-}t_{B}$ plane with boson densities $ρ_{A}=ρ_{B}=1/2$. In addition to the density wave phase reported in the experiment, we find several regimes of superfluidity when one or two hopping parameters are large enough, and interestingly there is a supercounterfluid phase at moderate and comparable hopping parameters. The universality classes of these phase transitions are analyzed from the correlation functions, excitation gaps, and entanglement entropy. In particular, a Berezinskii-Kosterlitz-Thouless type is recognized several gapped-to-gapless transitions. In addition, we also study the quantum phase transitions when varying $ρ_{B}$ from 0 to 1 while keeping $ρ_A = 1/2$. We identify a supersolid phase in a wide range of $1/2<ρ_B<1$. Our work paves the way for realizing exotic many-body phases in cold atom experiments upon proper tuning of experimental parameters. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_18154 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Emergent supercounterfluid and quantum phase diagram of two-component interacting bosons in one-dimensional optical lattice He, Saisai Liu, Yang Xi, Bin Luo, Hong-Gang Luo, Qiang Zhao, Jize Quantum Gases Strongly Correlated Electrons Motivated by a recent experiment that realizes nearest-neighbor dipolar couplings in an optical lattice [C. Lagoin, $\textit{et al.}$, Nature $\textbf{609}$, 485 (2022)], we study a one-dimensional version of the two-component extended Bose-Hubbard model via the density-matrix renormalization group method. By using the nearest-neighbor and on-site interaction parameters from the experiment, we start by mapping the quantum phase diagram in the hopping parameters $t_{A}\mbox{-}t_{B}$ plane with boson densities $ρ_{A}=ρ_{B}=1/2$. In addition to the density wave phase reported in the experiment, we find several regimes of superfluidity when one or two hopping parameters are large enough, and interestingly there is a supercounterfluid phase at moderate and comparable hopping parameters. The universality classes of these phase transitions are analyzed from the correlation functions, excitation gaps, and entanglement entropy. In particular, a Berezinskii-Kosterlitz-Thouless type is recognized several gapped-to-gapless transitions. In addition, we also study the quantum phase transitions when varying $ρ_{B}$ from 0 to 1 while keeping $ρ_A = 1/2$. We identify a supersolid phase in a wide range of $1/2<ρ_B<1$. Our work paves the way for realizing exotic many-body phases in cold atom experiments upon proper tuning of experimental parameters. |
| title | Emergent supercounterfluid and quantum phase diagram of two-component interacting bosons in one-dimensional optical lattice |
| topic | Quantum Gases Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2503.18154 |