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Updated: Nov 2, 2025
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Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
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Floquet dynamical quantum phase transitions in periodically quenched systems
1Department of Physics, College of Information Science and Engineering, Ocean University of China, Qingdao, 266100, People's Republic of China.
Summary
Researchers discovered multiple dynamical quantum phase transitions (DQPTs) in periodically driven systems. These Floquet DQPTs are linked to quantized topological properties and are observable in quantum simulators.
Area of Science:
- Quantum physics
- Condensed matter physics
- Topological phases of matter
Background:
- Dynamical quantum phase transitions (DQPTs) exhibit nonanalytic behavior in physical observables over time.
- Periodically driven systems can exhibit recurring DQPT signatures, known as Floquet DQPTs.
Purpose of the Study:
- To systematically explore Floquet DQPTs in one-dimensional systems with chiral symmetry under periodic quenching.
- To investigate the relationship between Floquet DQPTs, topological invariants, and dynamical topological order parameters.
Main Methods:
- Theoretical exploration of periodically quenched one-dimensional systems with chiral symmetry.
- Tuning quench strength to identify and characterize multiple Floquet DQPTs within a driving period.
- Analyzing the behavior of a dynamical topological order parameter during Floquet DQPTs.
Main Results:
- Discovery of multiple Floquet DQPTs within a single driving period, dependent on quench strength.
- Observation that more DQPTs appear with larger initial topological invariants.
- Each Floquet DQPT is associated with a quantized jump in a dynamical topological order parameter, which remains quantized in gapped topological phases.
Conclusions:
- The study demonstrates Floquet DQPTs in a piecewise quenched lattice model, realizable in quantum simulators.
- Findings offer a new perspective on Floquet engineering of DQPTs.
- The work provides a method for the dynamical detection of topological phase transitions in Floquet systems.
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