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Nonlinear Chiral-like State Transfer realized with a minimal set of parameters
1Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan, 430072, China.
Nature Communications
|July 2, 2025
Summary
This study introduces nonlinear chiral-like state transfer (NCST) without adiabatic evolution, simplifying experimental setups. This breakthrough in nonlinear exceptional points offers new pathways for miniaturizing quantum devices.
Area of Science:
- Quantum physics
- Nonlinear dynamics
- Circuit quantum electrodynamics
Background:
- Chiral state transfers (CSTs) linked to exceptional points are crucial in quantum physics.
- Conventional CSTs necessitate adiabatic parameter steering, leading to complex experiments and long evolution times, hindering device integration.
Purpose of the Study:
- To demonstrate a novel nonlinear-exceptional-point-associated chiral-like state transfer (NCST) scheme.
- To reduce experimental complexity and evolution time for CSTs.
Main Methods:
- Theoretical analysis of nonlinear Hamiltonians.
- Circuit-based experiments to validate the theoretical model.
- Investigation of parameter steering trajectories and basins of attraction.
Main Results:
- Demonstrated nonlinear chiral-like state transfer (NCST) independent of adiabatic evolution.
- Reduced steering trajectory to three distinct points by varying a single parameter.
- Showcased that NCSTs arise from nonlinear Hamiltonian basins of attraction, distinct from linear systems.
Conclusions:
- The developed NCST scheme significantly lowers experimental complexity and evolution time.
- This finding challenges conventional understanding of CSTs and their associated exceptional points.
- Paves the way for miniaturized quantum devices and novel applications leveraging nonlinear dynamics.
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