Collisionless drag for a one-dimensional two-component Bose-Hubbard model
We theoretically investigate the elusive Andreev-Bashkin collisionless drag for a two-component one-dimensional Bose-Hubbard model on a ring. By means of tensor network algorithms, we calculate the superfluid stiffness matrix as a function of intra- and interspecies interactions and of the lattice f...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2021-05-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.3.L022017 |
| _version_ | 1797210973867606016 |
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| author | Daniele Contessi Donato Romito Matteo Rizzi Alessio Recati |
| author_facet | Daniele Contessi Donato Romito Matteo Rizzi Alessio Recati |
| author_sort | Daniele Contessi |
| collection | DOAJ |
| description | We theoretically investigate the elusive Andreev-Bashkin collisionless drag for a two-component one-dimensional Bose-Hubbard model on a ring. By means of tensor network algorithms, we calculate the superfluid stiffness matrix as a function of intra- and interspecies interactions and of the lattice filling. We then focus on the most promising region close to the so-called pair-superfluid phase, where we observe that the drag can become comparable with the total superfluid density. We elucidate the importance of the drag in determining the long-range behavior of the correlation functions and the spin speed of sound. In this way, we are able to provide an expression for the spin Luttinger parameter K_{S} in terms of drag and the spin susceptibility. Our results are promising in view of implementing the system by using ultracold Bose mixtures trapped in deep optical lattices, where the size of the sample is of the same order of the number of particles we simulate. Importantly, the mesoscopicity of the system, far from being detrimental, appears to favor a large drag, avoiding the Berezinskii-Kosterlitz-Thouless jump at the transition to the pair-superfluid phase which would reduce the region where a large drag can be observed. |
| first_indexed | 2024-04-24T10:19:06Z |
| format | Article |
| id | doaj.art-158fe69515f84425b46bfe79a0a8bae5 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:19:06Z |
| publishDate | 2021-05-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-158fe69515f84425b46bfe79a0a8bae52024-04-12T17:10:17ZengAmerican Physical SocietyPhysical Review Research2643-15642021-05-0132L02201710.1103/PhysRevResearch.3.L022017Collisionless drag for a one-dimensional two-component Bose-Hubbard modelDaniele ContessiDonato RomitoMatteo RizziAlessio RecatiWe theoretically investigate the elusive Andreev-Bashkin collisionless drag for a two-component one-dimensional Bose-Hubbard model on a ring. By means of tensor network algorithms, we calculate the superfluid stiffness matrix as a function of intra- and interspecies interactions and of the lattice filling. We then focus on the most promising region close to the so-called pair-superfluid phase, where we observe that the drag can become comparable with the total superfluid density. We elucidate the importance of the drag in determining the long-range behavior of the correlation functions and the spin speed of sound. In this way, we are able to provide an expression for the spin Luttinger parameter K_{S} in terms of drag and the spin susceptibility. Our results are promising in view of implementing the system by using ultracold Bose mixtures trapped in deep optical lattices, where the size of the sample is of the same order of the number of particles we simulate. Importantly, the mesoscopicity of the system, far from being detrimental, appears to favor a large drag, avoiding the Berezinskii-Kosterlitz-Thouless jump at the transition to the pair-superfluid phase which would reduce the region where a large drag can be observed.http://doi.org/10.1103/PhysRevResearch.3.L022017 |
| spellingShingle | Daniele Contessi Donato Romito Matteo Rizzi Alessio Recati Collisionless drag for a one-dimensional two-component Bose-Hubbard model Physical Review Research |
| title | Collisionless drag for a one-dimensional two-component Bose-Hubbard model |
| title_full | Collisionless drag for a one-dimensional two-component Bose-Hubbard model |
| title_fullStr | Collisionless drag for a one-dimensional two-component Bose-Hubbard model |
| title_full_unstemmed | Collisionless drag for a one-dimensional two-component Bose-Hubbard model |
| title_short | Collisionless drag for a one-dimensional two-component Bose-Hubbard model |
| title_sort | collisionless drag for a one dimensional two component bose hubbard model |
| url | http://doi.org/10.1103/PhysRevResearch.3.L022017 |
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