Tunable and Robust Long-Range Coherent Interactions between Quantum Emitters Mediated by Weyl Bound States

Area of Science:

• Quantum physics
• Photonics
• Condensed matter theory

Background:

• Long-range coherent interactions are crucial for quantum information processing and simulation.
• Isolating these interactions from environmental dissipation remains a significant challenge.

Purpose of the Study:

• To propose a method for achieving long-range coherent interactions between quantum emitters in a photonic Weyl environment.
• To investigate the properties and potential applications of an exotic bound state mediating these interactions.

Main Methods:

• Utilizing an exact formalism to analyze the behavior of a topologically protected bound state in a photonic Weyl system.
• Investigating the spatial confinement, energy transfer dynamics, and robustness of the bound state.

Main Results:

• An exotic bound state with power-law spatial confinement mediates coherent excitation transfer between emitters with minimal dissipation.
• The interaction range is tunable, and the mediated interactions are robust against bath energy disorder.
• The transfer rate scales with distance according to the bound state's wave function.

Conclusions:

• This work presents the first photonic setup combining coherence, tunability, long range, and robustness for quantum interactions.
• The findings offer a pathway for developing advanced quantum entanglement protocols and quantum simulations of long-range interacting systems.