Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Laser probing of atomic Cooper pairs   We consider a gas of attractively interacting cold Fermionic atoms which are
manipulated by laser light. The laser induces a transition from an internal
state with large negative scattering length to one with almost no interactions.
The process can be viewed as a tunneling of atomic population between the
superconducting and the normal states of the gas. It can be used to detect the
BCS-ground state and to measure the superconducting order parameter.

29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th