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Journal Articles Communications Physics Year : 2022

Full quantum control of enantiomer-selective state transfer in chiral molecules despite degeneracy

Abstract

We prove complete controllability for rotational states of an asymmetric top molecule belonging to degenerate values of the orientational quantum number M. Based on this insight, we construct a pulse sequence that energetically separates population initially distributed over degenerate M-states, as a precursor for orientational purification. Introducing the concept of enantio-selective controllability, we determine the conditions for complete enantiomer-specific population transfer in chiral molecules and construct pulse sequences realizing this transfer for population initially distributed over degenerate M-states. This degeneracy presently limits enantiomer-selectivity for any initial state except the rotational ground state. Our work thus shows how to overcome an important obstacle towards separating, with electric fields only, left-handed from right-handed molecules in a racemic mixture.

Dates and versions

hal-02972059 , version 1 (20-10-2020)

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Monika Leibscher, Eugenio Pozzoli, Cristobal Pérez, Melanie Schnell, Mario Sigalotti, et al.. Full quantum control of enantiomer-selective state transfer in chiral molecules despite degeneracy. Communications Physics, 2022, ⟨10.1038/s42005-022-00883-6⟩. ⟨hal-02972059⟩
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