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Tunable Chiral Bound States with Giant Atoms
Xin Wang1,2, Tao Liu1, Anton Frisk Kockum3
1Theoretical Quantum Physics Laboratory, RIKEN Cluster for Pioneering Research, Wako-shi, Saitama 351-0198, Japan.
Physical Review Letters
|February 12, 2021
Summary
We demonstrate tunable chiral bound states in superconducting circuits using giant atoms and a photonic crystal waveguide. This novel system enables controlled quantum interactions and simulations, paving the way for topological phase transitions.
Area of Science:
- Quantum physics
- Condensed matter physics
- Photonics
Background:
- Superconducting circuits offer a promising platform for quantum technologies.
- Giant atoms interacting with waveguides can exhibit unique quantum phenomena.
- Photonic crystal waveguides provide novel ways to control light-matter interactions.
Purpose of the Study:
- To propose and theoretically investigate a novel quantum system exhibiting tunable chiral bound states.
- To explore the potential of this system for quantum simulations and topological phase transitions.
Main Methods:
- Utilizing superconducting giant atoms coupled to a Josephson photonic-crystal waveguide.
- Analyzing the interference effects in nonlocal atom-waveguide coupling.
- Investigating the tunability of chirality via atom-waveguide coupling and external bias.
Main Results:
- Demonstrated the emergence of tunable chiral bound states.
- Showcased the ability to control chirality by adjusting system parameters.
- Established that chiral bound states can mediate directional dipole-dipole interactions between giant atoms.
Conclusions:
- The proposed system offers a unique and experimentally feasible platform for exploring quantum phenomena.
- Tunable chiral bound states can serve as a powerful tool for quantum simulations and realizing topological phases.
- This work opens new avenues for advancements in superconducting quantum technologies.
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