Quantum phases for bosons in a magnetic lattice with a harmonic trap
The phase diagram of ultracold bosons in a 2D optical lattice subjected to a uniform magnetic flux is studied by the inhomogeneous Gutzwiller variational method. With a harmonic external potential, the density profile exhibits wedding-cake shape and the Mott phase forms a series of circular platform...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2020-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/ab95e0 |
| _version_ | 1797750217929392128 |
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| author | Ya-Fei Song Shi-Jie Yang |
| author_facet | Ya-Fei Song Shi-Jie Yang |
| author_sort | Ya-Fei Song |
| collection | DOAJ |
| description | The phase diagram of ultracold bosons in a 2D optical lattice subjected to a uniform magnetic flux is studied by the inhomogeneous Gutzwiller variational method. With a harmonic external potential, the density profile exhibits wedding-cake shape and the Mott phase forms a series of circular platforms with integer fillings. There are annular rings of superfluid between these platforms. We identify a lot of phases, including the unicirculation phase, the Meissner phase, the vortex phase, the reversed current phase and the vortex superfluid phase, by examining the super-currents. The circular chiral currents of the reversed current phase are opposite to other phases in annular superfluid and we analyzed the transitions between different phases. |
| first_indexed | 2024-03-12T16:30:29Z |
| format | Article |
| id | doaj.art-64ed0917bd444d619b2a699bcde2c21e |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:30:29Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-64ed0917bd444d619b2a699bcde2c21e2023-08-08T15:32:32ZengIOP PublishingNew Journal of Physics1367-26302020-01-0122707300110.1088/1367-2630/ab95e0Quantum phases for bosons in a magnetic lattice with a harmonic trapYa-Fei Song0https://orcid.org/0000-0002-4642-1666Shi-Jie Yang1Department of Physics, Beijing Normal University , Beijing 100875, People’s Republic of ChinaDepartment of Physics, Beijing Normal University , Beijing 100875, People’s Republic of ChinaThe phase diagram of ultracold bosons in a 2D optical lattice subjected to a uniform magnetic flux is studied by the inhomogeneous Gutzwiller variational method. With a harmonic external potential, the density profile exhibits wedding-cake shape and the Mott phase forms a series of circular platforms with integer fillings. There are annular rings of superfluid between these platforms. We identify a lot of phases, including the unicirculation phase, the Meissner phase, the vortex phase, the reversed current phase and the vortex superfluid phase, by examining the super-currents. The circular chiral currents of the reversed current phase are opposite to other phases in annular superfluid and we analyzed the transitions between different phases.https://doi.org/10.1088/1367-2630/ab95e0phase transitionsBose gasessynthetic gauge fieldschiral symmetryvortex lattices |
| spellingShingle | Ya-Fei Song Shi-Jie Yang Quantum phases for bosons in a magnetic lattice with a harmonic trap New Journal of Physics phase transitions Bose gases synthetic gauge fields chiral symmetry vortex lattices |
| title | Quantum phases for bosons in a magnetic lattice with a harmonic trap |
| title_full | Quantum phases for bosons in a magnetic lattice with a harmonic trap |
| title_fullStr | Quantum phases for bosons in a magnetic lattice with a harmonic trap |
| title_full_unstemmed | Quantum phases for bosons in a magnetic lattice with a harmonic trap |
| title_short | Quantum phases for bosons in a magnetic lattice with a harmonic trap |
| title_sort | quantum phases for bosons in a magnetic lattice with a harmonic trap |
| topic | phase transitions Bose gases synthetic gauge fields chiral symmetry vortex lattices |
| url | https://doi.org/10.1088/1367-2630/ab95e0 |
| work_keys_str_mv | AT yafeisong quantumphasesforbosonsinamagneticlatticewithaharmonictrap AT shijieyang quantumphasesforbosonsinamagneticlatticewithaharmonictrap |