Tunable Chiral Bound States with Giant Atoms
Journal article, 2021

We propose tunable chiral bound states in a system composed of superconducting giant atoms and a Josephson photonic-crystal waveguide (PCW), with no analog in other quantum setups. The chiral bound states arise due to interference in the nonlocal coupling of a giant atom to multiple points of the waveguide. The chirality can be tuned by changing either the atom-waveguide coupling or the external bias of the PCW. Furthermore, the chiral bound states can induce directional dipole-dipole interactions between multiple giant atoms coupling to the same waveguide. Our proposal is ready to be implemented in experiments with superconducting circuits, where it can be used as a tunable toolbox to realize topological phase transitions and quantum simulations.


Xin Wang

Xi'an Jiaotong University


Tao Liu


Anton Frisk Kockum

Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics

Hong Rong Li

Xi'an Jiaotong University

F. Nori

University of Michigan


Physical Review Letters

0031-9007 (ISSN) 1079-7114 (eISSN)

Vol. 126 4 043602

Subject Categories

Atom and Molecular Physics and Optics

Theoretical Chemistry

Condensed Matter Physics





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Latest update

2/9/2021 1