Superfluid-Mott transition in a frustrated triangular optical lattice
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866918147346399232 |
|---|---|
| author | Hasan, Mehedi Donini, Luca Shanokprasith, Sompob Braund, Daniel Marozsak, Tobias Epping, Moritz Reed, Daniel Melchner, Max Harte, Tiffany Schneider, Ulrich |
| author_facet | Hasan, Mehedi Donini, Luca Shanokprasith, Sompob Braund, Daniel Marozsak, Tobias Epping, Moritz Reed, Daniel Melchner, Max Harte, Tiffany Schneider, Ulrich |
| contents | Geometric frustration can significantly increase the complexity and richness of many-body physics and, for instance, suppress antiferromagnetic order in quantum magnets. Here, we employ ultracold bosonic $^{39}$K atoms in a triangular optical lattice to study geometric frustration by stabilizing the gas at the frustrated upper band edge using negative absolute temperatures. We find that geometric frustration suppresses the critical interaction strength for the (chiral-)superfluid to Mott insulator ($χ$-SF-MI) quantum phase transition by a factor of 2.7(3) and furthermore changes the critical dynamics of the transition. Although the emergence of coherence during fast ramps from MI to the ($χ$-)SF regime is continuous in both cases, for ramps longer than a few tunnelling times, significant differences emerge. In the \frs case, no long-range order emerges on the studied timescales, highlighting a significantly reduced rate or even saturation of the emerging coherence. This work opens the door to quantum simulations of frustrated systems that are often intractable by classical simulations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_20352 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Superfluid-Mott transition in a frustrated triangular optical lattice Hasan, Mehedi Donini, Luca Shanokprasith, Sompob Braund, Daniel Marozsak, Tobias Epping, Moritz Reed, Daniel Melchner, Max Harte, Tiffany Schneider, Ulrich Quantum Gases Statistical Mechanics Strongly Correlated Electrons Quantum Physics Geometric frustration can significantly increase the complexity and richness of many-body physics and, for instance, suppress antiferromagnetic order in quantum magnets. Here, we employ ultracold bosonic $^{39}$K atoms in a triangular optical lattice to study geometric frustration by stabilizing the gas at the frustrated upper band edge using negative absolute temperatures. We find that geometric frustration suppresses the critical interaction strength for the (chiral-)superfluid to Mott insulator ($χ$-SF-MI) quantum phase transition by a factor of 2.7(3) and furthermore changes the critical dynamics of the transition. Although the emergence of coherence during fast ramps from MI to the ($χ$-)SF regime is continuous in both cases, for ramps longer than a few tunnelling times, significant differences emerge. In the \frs case, no long-range order emerges on the studied timescales, highlighting a significantly reduced rate or even saturation of the emerging coherence. This work opens the door to quantum simulations of frustrated systems that are often intractable by classical simulations. |
| title | Superfluid-Mott transition in a frustrated triangular optical lattice |
| topic | Quantum Gases Statistical Mechanics Strongly Correlated Electrons Quantum Physics |
| url | https://arxiv.org/abs/2509.20352 |