Microwave Tunneling and Robust Information Transfer Based on Parity-Time-Symmetric Absorber-Emitter Pairs

Area of Science:

• Physics
• Electromagnetics
• Quantum Mechanics

Background:

• Robust signal transfer is crucial for modern technology but faces channel-induced modifications.
• Parity-time (PT) symmetric systems offer a novel approach by balancing active and passive elements.

Purpose of the Study:

• To demonstrate a PT-symmetric microwave system for overcoming channel obstacles.
• To achieve full information restoration and transparency despite a shorted channel.

Main Methods:

• Utilizing a PT-symmetric microwave system with a shorted channel (small reactance obstacle).
• Implementing a gain element behind the obstacle and a balanced lossy element in front.
• Conducting theoretical analysis, simulations, and experimental validation.

Main Results:

• Observed full restoration of information and overall transparency.
• Demonstrated stable and robust wave tunneling and information transfer.
• Showcased the effectiveness of PT symmetry in overcoming significant channel impedance.

Conclusions:

• PT symmetry enables robust wave tunneling and information transfer through severely obstructed channels.
• This approach opens opportunities for efficient communication in dynamic environments.
• Potential applications include active filtering and advanced metamaterial technologies.