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- Publisher Website: 10.1103/PhysRevA.98.041603
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Article: Geometric effects in the effective-mass theory and topological optical superlattices
Title | Geometric effects in the effective-mass theory and topological optical superlattices |
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Authors | |
Issue Date | 2018 |
Citation | Physical Review A, 2018, v. 98, n. 4, article no. 041603 How to Cite? |
Abstract | Cold atoms tailored by an optical lattice have become a fascinating arena for simulating quantum physics. In this area, one important and challenging problem is creating effective spin-orbit coupling (SOC), especially for fashioning a cold atomic gas into a topological phase, for which prevailing approaches mainly rely on the Raman coupling between the atomic internal states and a laser field. Herein, a strategy for realizing effective SOC is proposed by exploiting the geometric effects in the effective-mass theory, without resorting to internal atomic states. It is shown that the geometry of Bloch states can have nontrivial effects on the wave-mechanical states under external fields, leading to effective SOC and an effective Darwin term, which have been neglected in the standard effective-mass approximation. It is demonstrated that these relativisticlike effects can be employed to introduce effective SOC in a two-dimensional optical superlattice, and induce a nontrivial topological phase. |
Persistent Identifier | http://hdl.handle.net/10722/324063 |
ISSN | 2023 Impact Factor: 2.6 2023 SCImago Journal Rankings: 1.081 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Li, Chao Kai | - |
dc.contributor.author | Niu, Qian | - |
dc.contributor.author | Feng, Ji | - |
dc.date.accessioned | 2023-01-13T03:01:14Z | - |
dc.date.available | 2023-01-13T03:01:14Z | - |
dc.date.issued | 2018 | - |
dc.identifier.citation | Physical Review A, 2018, v. 98, n. 4, article no. 041603 | - |
dc.identifier.issn | 2469-9926 | - |
dc.identifier.uri | http://hdl.handle.net/10722/324063 | - |
dc.description.abstract | Cold atoms tailored by an optical lattice have become a fascinating arena for simulating quantum physics. In this area, one important and challenging problem is creating effective spin-orbit coupling (SOC), especially for fashioning a cold atomic gas into a topological phase, for which prevailing approaches mainly rely on the Raman coupling between the atomic internal states and a laser field. Herein, a strategy for realizing effective SOC is proposed by exploiting the geometric effects in the effective-mass theory, without resorting to internal atomic states. It is shown that the geometry of Bloch states can have nontrivial effects on the wave-mechanical states under external fields, leading to effective SOC and an effective Darwin term, which have been neglected in the standard effective-mass approximation. It is demonstrated that these relativisticlike effects can be employed to introduce effective SOC in a two-dimensional optical superlattice, and induce a nontrivial topological phase. | - |
dc.language | eng | - |
dc.relation.ispartof | Physical Review A | - |
dc.title | Geometric effects in the effective-mass theory and topological optical superlattices | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1103/PhysRevA.98.041603 | - |
dc.identifier.scopus | eid_2-s2.0-85056351390 | - |
dc.identifier.volume | 98 | - |
dc.identifier.issue | 4 | - |
dc.identifier.spage | article no. 041603 | - |
dc.identifier.epage | article no. 041603 | - |
dc.identifier.eissn | 2469-9934 | - |
dc.identifier.isi | WOS:000448910700002 | - |