Sensitive enhancement of cat state quantum illumination

Area of Science:

• Quantum Optics
• Quantum Sensing
• Quantum Information Science

Background:

• Quantum illumination utilizes binary hypothesis testing for detecting low-reflective objects.
• Both cat and Gaussian states offer a theoretical 3dB sensitivity gain over coherent states at low intensities.

Purpose of the Study:

• To enhance the quantum advantage of quantum illumination by optimizing illuminating cat states.
• To investigate the impact of larger illuminating intensities on quantum advantage.

Main Methods:

• Optimization of generic cat states for quantum illumination.
• Comparison of quantum Fisher information and error exponent to evaluate sensitivity.

Main Results:

• Demonstrated further optimization of quantum illumination sensitivity using proposed cat states.
• Achieved a 10.3% sensitive enhancement compared to previous cat state illumination methods.

Conclusions:

• Optimized cat states offer improved sensitivity in quantum illumination for object detection.
• The findings pave the way for more effective quantum sensing applications.