Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fast and dense magneto-optical traps for Strontium   We improve the efficiency of sawtooth-wave-adiabatic-passage (SWAP) cooling
for strontium atoms in three dimensions and combine it with standard
narrow-line laser cooling. With this technique, we create strontium
magneto-optical traps with $6\times 10^7$ bosonic $^{88}$Sr ($1\times 10^7$
fermionic $^{87}$Sr) atoms at phase-space densities of $2\times 10^{-3}$
($1.4\times 10^{-4}$). Our method is simple to implement and is faster and more
robust than traditional cooling methods.

2
The categories of this paper are: math
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci