Forming a Single Molecule by Magnetoassociation in an Optical Tweezer.,Physical Review Letters

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Forming a Single Molecule by Magnetoassociation in an Optical Tweezer.
Physical Review Letters ( IF 8.1 ) Pub Date : 2020-06-25 , DOI: 10.1103/physrevlett.124.253401
Jessie T Zhang _{1,

2,

3} , Yichao Yu _{1,

2,

3} , William B Cairncross _{1,

2,

3} , Kenneth Wang _{1,

2,

3} , Lewis R B Picard _{1,

2,

3} , Jonathan D Hood _{2,

3} , Yen-Wei Lin _{2,

3} , Jeremy M Hutson ₄ , Kang-Kuen Ni _{1,

2,

3}

Affiliation

We demonstrate the formation of a single NaCs molecule in an optical tweezer by magnetoassociation through an

s

-wave Feshbach resonance at 864.11(5) G. Starting from single atoms cooled to their motional ground states, we achieve conversion efficiencies of 47(1)%, and measure a molecular lifetime of 4.7(7) ms. By construction, the single molecules are predominantly [77(5)%] in the center-of-mass motional ground state of the tweezer. Furthermore, we produce a single

p

-wave molecule near 807 G by first preparing one of the atoms with one quantum of motional excitation. Our creation of a single weakly bound molecule in a designated internal state in the motional ground state of an optical tweezer is a crucial step towards coherent control of single molecules in optical tweezer arrays.

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