Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Observation of interference between resonant and detuned STIRAP in the
  adiabatic creation of $^{23}$Na$^{40}$K molecules   Stimulated Raman adiabatic passage (STIRAP) allows to efficiently
transferring the populations between two discrete quantum states and has been
used to prepare molecules in their rovibrational ground state. In realistic
molecules, a well-resolved intermediate state is usually selected to implement
the resonant STIRAP. Due to the complex molecular level structures, the detuned
STIRAP always coexists with the resonant STIRAP and may cause unexpected
interference phenomenon. However, it is generally accepted that the detuned
STIRAP can be neglected if compared with the resonant STIRAP. Here we report on
the first observation of interference between the resonant and detuned STIRAP
in the adiabatic creation of $^{23}$Na$^{40}$K ground-state molecules. The
interference is identified by observing that the number of Feshbach molecules
after a round-trip STIRAP oscillates as a function of the hold time, with a
visibility of about 90\%. This occurs even if the intermediate excited states
are well resolved, and the single-photon detuning of the detuned STIRAP is
about one order of magnitude larger than the linewidth of the excited state and
the Rabi frequencies of the STIRAP lasers. Moreover, the observed interference
indicates that if more than one hyperfine level of the ground state is
populated, the STIRAP prepares a coherent superposition state among them, but
not an incoherent mixed state. Further, the purity of the hyperfine levels of
the created ground state can be quantitatively determined by the visibility of
the oscillation.

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The categories of this paper are: dg-ga
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The categories of this paper are: supr-con
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The categories of this paper are: nucl-ex
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The categories of this paper are: atom-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: stat
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The categories of this paper are: cmp-lg
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The categories of this paper are: acc-phys
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The categories of this paper are: gr-qc
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The categories of this paper are: comp-gas
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The categories of this paper are: alg-geom
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The categories of this paper are: astro-ph
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The categories of this paper are: eess
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The categories of this paper are: plasm-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: quant-ph