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Effective chirality discrimination via dissipation dynamics

QUANTUM INFORMATION PROCESSING(2023)

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Abstract
In this paper, we propose a protocol to distinguish chiral molecules using dissipation dynamics. The physical model is based on a four-level structure with a ground level, a lower level, and two excited levels. Under the condition of large detuning, a chirality-selective transition from the ground level to a dressed state of two excited levels can be achieved, where only the left-handed enantiomer can be exited to the dressed state. The left-handed enantiomer in the dressed state will couple with the cavity mode and evolve to the lower level with a photon creation. When the photon loss happens, the left-handed enantiomer cannot be excited to the dressed state again by absorbing the photon, thus remaining in the lower level. Then, the chiralities of the enantiomers can be distinguished by measuring their final states. We take 1,2-propanediol molecules as an example to demonstrate the protocol, where the difference of the populations of the lower level for the left- and right-handed enantiomer approaches unity in a relatively short operation time. Numerical simulation results show that the scheme is insensitive to the influence of the phase drift and frequency mismatch. Therefore, the protocol may provide an alternative approach for chirality discrimination.
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Key words
Chirality discrimination, Dissipation dynamics
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