Interference trapping of populations in a semi-infinite coupled-resonator waveguide

• URL: http://arxiv.org/abs/2504.02358v1
• Date: Thu, 03 Apr 2025 07:45:42 GMT
• Title: Interference trapping of populations in a semi-infinite coupled-resonator waveguide
• Authors: Qinglian Fu, Jing Li, Jing Lu, Zhihui Peng, Lan Zhou,
• Abstract summary: We study the energy structure and dynamics of a two-level emitter (2LE) locally coupled to a 1D coupled-resonator array (CRA)<n>The energy spectrum in the single-excitation subspace features a continuous band with scattering states, discrete levels with bound states, and a quantum phase transition characterized by the change of the number of bound states.
• Score: 11.524269905319084
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We study the energy structure and dynamics of a two-level emitter (2LE) locally coupled to a semi-infinite one-dimensional (1D) coupled-resonator array (CRA). The energy spectrum in the single-excitation subspace features a continuous band with scattering states, discrete levels with bound states, and a quantum phase transition characterized by the change of the number of bound states. The number of bound states is revealed by the behavior of the excited-state population at long times with quantum beat, residual oscillation, a constant with either non-zero or zero.

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