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Efficient Internal-State Separation of Chiral Molecules via PT-Symmetric System Regulation
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DOI：10.1007/s10773-026-06325-1.png)
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Abstract
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This study proposes an efficient method for the internal-state separation of enantiomers in an open system. Under large detuning conditions, by introducing balanced gain and dissipation into the cyclic three-level systems of chiral molecules, we reduce the systems to effective parity-time (PT)-symmetric two-level systems. Both enantiomers are initially prepared in the ground state. When parameters confine them within the PT-symmetric phase, their ground- and excited-state populations exhibit periodic oscillations with distinct periods. Through parameter modulation, left-handed enantiomers stay in the PT-symmetric phase with populations oscillating periodically, while right-handed ones enter the PT-broken phase with populations growing exponentially. Efficient internal-state separation can be achieved in both scenarios by optimizing parameters such that distinct enantiomers occupy different energy levels at a specific evolution time.
Keywords:
Chiral molecules
Non-Hermitian systems
Internal-state separation
PT-symmetric systems
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