Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Modified "delta kick cooling" for studies of atomic tunneling   We present progress towards a planned experiment on atomic tunneling of
ultra-cold Rb atoms. As a first step in this experiment we present a
realization of an improved form of "delta-kick cooling." By application of a
pulsed magnetic field, laser cooled Rb atoms are further cooled by a factor of
10 (in 1-D) over the temperature out of molasses. Temperatures below 700 nK are
observed. The technique can be used not only to cool without fundamental limit
(but conserving phase-space density), but also to focus atoms, and as a
spin-dependent probe.

18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys