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Journal Articles Communications Physics Year : 2022

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

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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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Cite

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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