Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Opportunities for detecting ring currents using the attoclock set-up   Strong field ionization by circularly polarized laser fields from initial
states with internal orbital momentum has interesting propensity rule:
electrons counter-rotating with respect to the laser field can be liberated
more easily than co-rotating electrons [Barth and Smirnova PRA 84, 063415,
2011}]. Here we show that application of few-cycle IR pulses allows one to use
this propensity rule to detect ring currents associated with such quantum
states, by observing angular shifts of the ejected electrons. Such shifts
present the main observable of the attoclock method. We use time-dependent
Analytical $R$-Matrix (A$R$M) theory to show that the attoclock measured
angular shifts of an electron originating from two counter-rotating orbitals
($p^{+}$ and $p^{-}$) are noticeably different. Our work opens new
opportunities for detecting ring currents excited in atoms and molecules, using
the attoclock set-up.

15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int