Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Observation of nonadditive mixed state phases with polarized neutrons   In a neutron polarimetry experiment the mixed state relative phases between
spin eigenstates are determined from the maxima and minima of measured
intensity oscillations. We consider evolutions leading to purely geometric,
purely dynamical and combined phases. It is experimentally demonstrated that
the sum of the individually determined geometric and dynamical phases is not
equal to the associated total phase which is obtained from a single
measurement, unless the system is in a pure state.

1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
3
The categories of this paper are: physics
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an