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Realization and Detection of Nonergodic Critical Phases in an Optical Raman Lattice
- Source :
- Physical Review Letters. 125
- Publication Year :
- 2020
- Publisher :
- American Physical Society (APS), 2020.
-
Abstract
- The critical phases, being delocalized but non-ergodic, are fundamental phases which are different from both the many-body localization and ergodic extended quantum phases, and have so far not been realized in experiment. Here we propose to realize such critical phases with and without interaction based on a topological optical Raman lattice scheme, which possesses one-dimensional spin-orbit coupling and an incommensurate Zeeman potential. We demonstrate the existence of both the noninteracting and many-body critical phases, which can coexist with the topological phase, and show that the critical-localization transition coincides with the topological phase boundary in noninteracting regime. The dynamical detection of the critical phases is proposed and studied in detail. Finally, we demonstrate how the proposed critical phases can be achieved based on the current cold atom experiments. This work paves the way to observe the novel critical phases.<br />Comment: 5 pages (4 figures) + Supplementary Material (6 figures). Discussions are updated
- Subjects :
- Condensed Matter::Quantum Gases
Physics
Quantum Physics
Phase boundary
Zeeman effect
Strongly Correlated Electrons (cond-mat.str-el)
Condensed matter physics
FOS: Physical sciences
General Physics and Astronomy
Disordered Systems and Neural Networks (cond-mat.dis-nn)
Quantum phases
Condensed Matter - Disordered Systems and Neural Networks
01 natural sciences
Condensed Matter - Strongly Correlated Electrons
symbols.namesake
Delocalized electron
Ultracold atom
Lattice (order)
0103 physical sciences
symbols
Ergodic theory
Quantum Physics (quant-ph)
010306 general physics
Raman spectroscopy
Subjects
Details
- ISSN :
- 10797114 and 00319007
- Volume :
- 125
- Database :
- OpenAIRE
- Journal :
- Physical Review Letters
- Accession number :
- edsair.doi.dedup.....55e1d03a3396cd00775243fcac4e816d