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29 March 2024
 
  » arxiv » 2009.11671

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Double Parameters Modulated Optical Lattice Clock: Interference and Topology
Xiao-Tong Lu ; Tao Wang ; Ting Li ; Chi-Hua Zhou ; Mo-Juan Yin ; Ye-Bing Wang ; Xue-Feng Zhang ; Hong Chang ;
Date 24 Sep 2020
AbstractThe quantum system under periodical modulation is the simplest path to understand the quantum non-equilibrium system, because it can be well described by the effective static Floquet Hamiltonian. Under the stroboscopic measurement, the initial phase is usually irrelevant. However, if two uncorrelated parameters are modulated, their relative phase can not be gauged out, so that it can dramatically change physics. Here, we simultaneously modulate the frequency of lattice laser and Rabi frequency in the optical lattice clock (OLC) system. Thanks to ultra-high precision and ultra-stability of OLC, the relative phase could be fine-tuned. As a smoking gun, we observed the interference between two Floquet channels. At last, we discuss the relation between effective Floquet Hamiltonian and 1-D topological insulator with high winding numbers. Our experiment not only provides a direction for detecting the phase effect, but also paves a way in simulating quantum topological phase in OLC platform.
Source arXiv, 2009.11671
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