Bose-Fermi $N$-polaron state emergence from correlation-mediated blocking of phase separation
Fuente:
arXiv
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866910851300065280 |
|---|---|
| author | Gómez-Lozada, Felipe Hiyane, Hoshu Busch, Thomas Fogarty, Thomás |
| author_facet | Gómez-Lozada, Felipe Hiyane, Hoshu Busch, Thomas Fogarty, Thomás |
| contents | We study $N$ fermionic impurities in a one-dimensional lattice bosonic bath at unit filling. Using DMRG and mixed boundary conditions-periodic for bosons, open for fermions -- we find an $N$-polaron ground state replacing phase separation at high interspecies repulsion. This tightly bound state of clustered particles emerges due to strong impurity-bath correlations, which induce large impurity-impurity correlations that we quantify via the von Neumann entropy and bipartite mutual information, respectively. This system also reveals a fermionic self-localization effect from a Mott insulator background due to local correlations between the impurities and the bath. The growth of long-range correlations breaks this Mott phase, resulting in the transition to impurity clusters delocalized along the system. Finally, we show that there is a critical impurity number, which depends on intraspecies bosonic interaction, beyond which phase separation is recovered. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_13785 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Bose-Fermi $N$-polaron state emergence from correlation-mediated blocking of phase separation Gómez-Lozada, Felipe Hiyane, Hoshu Busch, Thomas Fogarty, Thomás Quantum Gases Quantum Physics We study $N$ fermionic impurities in a one-dimensional lattice bosonic bath at unit filling. Using DMRG and mixed boundary conditions-periodic for bosons, open for fermions -- we find an $N$-polaron ground state replacing phase separation at high interspecies repulsion. This tightly bound state of clustered particles emerges due to strong impurity-bath correlations, which induce large impurity-impurity correlations that we quantify via the von Neumann entropy and bipartite mutual information, respectively. This system also reveals a fermionic self-localization effect from a Mott insulator background due to local correlations between the impurities and the bath. The growth of long-range correlations breaks this Mott phase, resulting in the transition to impurity clusters delocalized along the system. Finally, we show that there is a critical impurity number, which depends on intraspecies bosonic interaction, beyond which phase separation is recovered. |
| title | Bose-Fermi $N$-polaron state emergence from correlation-mediated blocking of phase separation |
| topic | Quantum Gases Quantum Physics |
| url | https://arxiv.org/abs/2409.13785 |