Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Observation of geometric phase for unpolarized and partially polarized
  light fields   Geometric phase, owing to its topological nature and properties of fault
tolerance, plays an important role in devising real world applications in both
classical and quantum domain. For classical systems, geometric phase has been
observed and studied so far for fully polarized light only. Using an
interferometric experiment we demonstrate, for the first time, the existence of
Pancharatnam-Berry phase for states covering all empty space inside the
Poincar\'e sphere namely the unpolarized and partially polarized light fields.
The observed geometric phase is found identical to its fully polarized
counterpart in excellent agreement with the theoretical predictions.

1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph