Non‐Hermitian Photon‐Phonon Quantization Evolution Controlled by QWP Polarization Phase in Sm 3+ : BiPO 4

Abstract

ABSTRACT Non‐Hermitian quantum dynamics provide powerful approaches for controlling gain and loss in open quantum systems. However, experimental methods for tuning non‐Hermitian quantization remain limited. In this work, we investigate the evolution of non‐Hermitian photon–phonon dressed‐state quantization in Sm 3+ : BiPO 4 controlled by the polarization‐dressing phase using a quarter‐wave plate (QWP). We observed three types of destructive and constructive switching behavior, governed by the initial phase and determined by the competition between photon‐dressing Rabi frequency and dephasing rate. By continuously tuning the polarization phase, destructive quantization appears when the dephasing rate is dominant, whereas constructive quantization is stabilized by the photon Rabi frequency. These regimes exhibit discrete optical jumps, Landau‐like step‐level macroscopic quantization, and exceptional‐point switching between correlated states. Lower excitation power further enhances polarization‐controlled dressing quantization because of the larger dephasing rate. These results establish polarization phase as an effective control parameter for non‐Hermitian quantum jumps and macroscopic quantization, opening new possibilities for optical switching and quantum memory applications.