Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum Gas of Deeply Bound Ground State Molecules   We create an ultracold dense quantum gas of ground state molecules bound by
more than 1000 wavenumbers by stimulated two-photon transfer of molecules
associated on a Feshbach resonance from a Bose-Einstein condensate of cesium
atoms. The transfer efficiency exceeds 80%. In the process, the initial loose,
long-range electrostatic bond of the Feshbach molecule is coherently
transformed into a tight chemical bond. We demonstrate coherence of the
transfer in a Ramsey-type experiment and show that the molecular sample is not
heated during the transfer. Our results show that the preparation of a quantum
gas of molecules in arbitrary rovibrational states is possible and that the
creation of a Bose-Einstein condensate of molecules in their rovibronic ground
state is within reach.

21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
3
The categories of this paper are: physics
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math