Path-Degenerate Quantum Interferometry for Loss Resilience in Gravitational-Wave Detectors
The research proposes a path-degenerate quantum interferometry scheme to enhance gravitational-wave detector sensitivity by reducing optical losses and spatial mode mismatches. By reorganizing the optical layout, it eliminates the need for external components like Faraday isolators and intrinsically integrates variational output, leading to shot-noise-preserving signal enhancement even under significant measurement loss.