Mobility edges and critical regions in a periodically kicked incommensurate optical Raman lattice

Yucheng Wang1,2,3

2022-11-15

10.1103/PhysRevA.106.053312

PHYSICAL REVIEW A   Impact Factor & Quartile

2469-9926

2469-9934

Conventionally the mobility edge (ME) separating extended states from localized ones is a central concept in understanding Anderson localization transition. The critical state, being delocalized and nonergodic, is a third type of fundamental state that is different from both the extended and localized states. Here we study the localization phenomena in a one-dimensional periodically kicked quasiperiodic optical Raman lattice by using fractal dimensions. We show a rich phase diagram including the pure extended, critical, and localized phases in the high-frequency regime, the MEs separating the critical regions from the extended (localized) regions, and the coexisting phase of extended, critical, and localized regions with increasing the kicked period. We also find the fragility of phase boundaries, which are more susceptible to the dynamical kick, and the phenomenon of the reentrant localization transition. Finally, we demonstrate how the studied model can be realized based on current cold atom experiments and how to detect rich physics by expansion dynamics. Our results provide insight into studying and detecting critical phases, MEs, coexisting quantum phases, and some other physics phenomena in the periodically kicked systems.

SCI

English

NI Journal Papers

First

[2022YFA1405800] ; [12104205] ; [2018B030326001] ; [2019B121203002]

Optics ; Physics

Optics ; Physics, Atomic, Molecular & Chemical

WOS:000916208500004

AMER PHYSICAL SOC

PHYSICS

Web of Science

1.Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
2.International Quantum Academy, Shenzhen 518048, China
3.Guangdong Provincial Key Laboratory of Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China

Yucheng Wang. Mobility edges and critical regions in a periodically kicked incommensurate optical Raman lattice[J]. PHYSICAL REVIEW A,2022,106(5).

Yucheng Wang.(2022).Mobility edges and critical regions in a periodically kicked incommensurate optical Raman lattice.PHYSICAL REVIEW A,106(5).

Yucheng Wang."Mobility edges and critical regions in a periodically kicked incommensurate optical Raman lattice".PHYSICAL REVIEW A 106.5(2022).