Chiral topological phases in optical lattices without synthetic fields
| Autor: | Mengsu Chen, Sumanta Tewari, Hoi-Yin Hui, Vito Scarola |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Condensed Matter::Quantum Gases
Physics Optical lattice Strongly Correlated Electrons (cond-mat.str-el) Entropy (statistical thermodynamics) Mott insulator FOS: Physical sciences Fermion Topology 01 natural sciences 010305 fluids & plasmas Condensed Matter - Strongly Correlated Electrons Dipole T-symmetry Quantum Gases (cond-mat.quant-gas) Electric field Phase (matter) 0103 physical sciences Condensed Matter - Quantum Gases 010306 general physics |
| Zdroj: | Physical Review A. 98 |
| ISSN: | 2469-9934 2469-9926 |
| DOI: | 10.1103/physreva.98.023609 |
| Popis: | Synthetic fields applied to ultracold quantum gases can realize topological phases that transcend conventional Bose and Fermi-liquid paradigms. Raman laser beams in particular are under scrutiny as a route to create synthetic fields in neutral gases to mimic ordinary magnetic and electric fields acting on charged matter. Yet external laser beams can impose heating and losses that make cooling into many-body topological phases challenging. We propose that atomic or molecular dipoles placed in optical lattices can realize a topological phase without synthetic fields by placing them in certain frustrated lattices. We use numerical modeling on a specific example to show that the interactions between dipolar fermions placed in a kagome optical lattice spontaneously break time reversal symmetry to lead to a topological Mott insulator, a chiral topological phase generated entirely by interactions. We estimate realistic entropy and trapping parameters to argue that this intriguing phase of matter can be probed with quantum gases using a combination of recently implemented technologies. Comment: 7 pages, 4 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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