Triangular and honeycomb lattices of cold atoms in optical cavities
We consider a two-dimensional homogeneous ensemble of cold bosonic atoms loaded inside two optical cavities and pumped by a far-detuned external laser field. We examine the conditions for these atoms to self-organize into triangular and honeycomb lattices as a result of superradiance. By collectivel...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2015
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| Online Access: | https://hdl.handle.net/10356/81111 http://hdl.handle.net/10220/39129 |
| _version_ | 1811677983809732608 |
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| author | Safaei, Shabnam Miniatura, Christian Grémaud, Benoît |
| author2 | Institute of Advanced Studies |
| author_facet | Institute of Advanced Studies Safaei, Shabnam Miniatura, Christian Grémaud, Benoît |
| author_sort | Safaei, Shabnam |
| collection | NTU |
| description | We consider a two-dimensional homogeneous ensemble of cold bosonic atoms loaded inside two optical cavities and pumped by a far-detuned external laser field. We examine the conditions for these atoms to self-organize into triangular and honeycomb lattices as a result of superradiance. By collectively scattering the pump photons, the atoms feed the initially empty cavity modes. As a result, the superposition of the pump and cavity fields creates a space-periodic light-shift external potential and atoms self-organize into the potential wells of this optical lattice. Depending on the phase of the cavity fields with respect to the pump laser, these minima can either form a triangular or a hexagonal lattice. By numerically solving the dynamical equations of the coupled atom-cavity system, we have shown that the two stable atomic structures at long times are the triangular lattice and the honeycomb lattice with equally populated sites. We have also studied how to drive atoms from one lattice structure to another by dynamically changing the phase of the cavity fields with respect to the pump laser. |
| first_indexed | 2024-10-01T02:46:02Z |
| format | Journal Article |
| id | ntu-10356/81111 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:46:02Z |
| publishDate | 2015 |
| record_format | dspace |
| spelling | ntu-10356/811112020-09-26T21:54:49Z Triangular and honeycomb lattices of cold atoms in optical cavities Safaei, Shabnam Miniatura, Christian Grémaud, Benoît Institute of Advanced Studies We consider a two-dimensional homogeneous ensemble of cold bosonic atoms loaded inside two optical cavities and pumped by a far-detuned external laser field. We examine the conditions for these atoms to self-organize into triangular and honeycomb lattices as a result of superradiance. By collectively scattering the pump photons, the atoms feed the initially empty cavity modes. As a result, the superposition of the pump and cavity fields creates a space-periodic light-shift external potential and atoms self-organize into the potential wells of this optical lattice. Depending on the phase of the cavity fields with respect to the pump laser, these minima can either form a triangular or a hexagonal lattice. By numerically solving the dynamical equations of the coupled atom-cavity system, we have shown that the two stable atomic structures at long times are the triangular lattice and the honeycomb lattice with equally populated sites. We have also studied how to drive atoms from one lattice structure to another by dynamically changing the phase of the cavity fields with respect to the pump laser. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) Published version 2015-12-17T06:10:20Z 2019-12-06T14:21:37Z 2015-12-17T06:10:20Z 2019-12-06T14:21:37Z 2015 Journal Article Safaei, S., Miniatura, C., & Grémaud, B. (2015). Triangular and honeycomb lattices of cold atoms in optical cavities. Physical Review A, 92(4), 043810-. 1050-2947 https://hdl.handle.net/10356/81111 http://hdl.handle.net/10220/39129 10.1103/PhysRevA.92.043810 en Physical Review A © 2015 American Physical Society. This paper was published in Physical Review A and is made available as an electronic reprint (preprint) with permission of American Physical Society. The published version is available at: [http://dx.doi.org/10.1103/PhysRevA.92.043810]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. 16 p. application/pdf |
| spellingShingle | Safaei, Shabnam Miniatura, Christian Grémaud, Benoît Triangular and honeycomb lattices of cold atoms in optical cavities |
| title | Triangular and honeycomb lattices of cold atoms in optical cavities |
| title_full | Triangular and honeycomb lattices of cold atoms in optical cavities |
| title_fullStr | Triangular and honeycomb lattices of cold atoms in optical cavities |
| title_full_unstemmed | Triangular and honeycomb lattices of cold atoms in optical cavities |
| title_short | Triangular and honeycomb lattices of cold atoms in optical cavities |
| title_sort | triangular and honeycomb lattices of cold atoms in optical cavities |
| url | https://hdl.handle.net/10356/81111 http://hdl.handle.net/10220/39129 |
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