Disordered solid to Bose-glass transition in Bose-Hubbard model with disorder and long-range interactions
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866912364702466048 |
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| author | Pebam, Kohenjit Angom, Laxmi Thoudam, Bhumika Hrangbung, Momin Gaur, Deepak Angom, Dilip |
| author_facet | Pebam, Kohenjit Angom, Laxmi Thoudam, Bhumika Hrangbung, Momin Gaur, Deepak Angom, Dilip |
| contents | The introduction of disorder in Bose-Hubbard model gives rise to new glassy quantum phases, namely the Bose-glass (BG) and disordered solid (DS) phases. In this work, we present the rich phase diagram of interacting bosons in disordered two-dimensional optical lattice, modelled by the disordered Bose-Hubbard model. We systematically probe the effect of long-range interaction truncated to the nearest neighbors and next-nearest neighbors on the phase diagram. We investigate the zero-temperature ground-state quantum phases using the single-site Gutzwiller mean field (SGMF) theory. We also employ strong-coupling perturbative expansion to identify the nature of ground-state solid phases analytically. At sufficiently high disorder strength, we observe a quantum phase transition between the DS and BG phases. We have investigated this transition in greater detail using cluster Gutzwiller mean field theory to study the effect of inter-site correlations which is absent in the SGMF method. We have also studied this phase transition from the perspective of percolation theory. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2505_04476 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Disordered solid to Bose-glass transition in Bose-Hubbard model with disorder and long-range interactions Pebam, Kohenjit Angom, Laxmi Thoudam, Bhumika Hrangbung, Momin Gaur, Deepak Angom, Dilip Quantum Gases The introduction of disorder in Bose-Hubbard model gives rise to new glassy quantum phases, namely the Bose-glass (BG) and disordered solid (DS) phases. In this work, we present the rich phase diagram of interacting bosons in disordered two-dimensional optical lattice, modelled by the disordered Bose-Hubbard model. We systematically probe the effect of long-range interaction truncated to the nearest neighbors and next-nearest neighbors on the phase diagram. We investigate the zero-temperature ground-state quantum phases using the single-site Gutzwiller mean field (SGMF) theory. We also employ strong-coupling perturbative expansion to identify the nature of ground-state solid phases analytically. At sufficiently high disorder strength, we observe a quantum phase transition between the DS and BG phases. We have investigated this transition in greater detail using cluster Gutzwiller mean field theory to study the effect of inter-site correlations which is absent in the SGMF method. We have also studied this phase transition from the perspective of percolation theory. |
| title | Disordered solid to Bose-glass transition in Bose-Hubbard model with disorder and long-range interactions |
| topic | Quantum Gases |
| url | https://arxiv.org/abs/2505.04476 |