Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum mechanics: A new chapter?   We review the conceptual problems in quantum mechanics on a fundamental
level. It is shown that the proposed model of extended electrons and a clear
understanding of rotations in three dimensional space solve a large part of
these problems, in particular the problems related to the ontological status
and physical meaning of wavefunctions. It also solves the problem of
non-locality. The experimental results obtained in Yves Couder's group and
theoretical results by Gerdard Gr\"ossing indicate that the wave-like
distribution of trajectories of electrons in interference experiments are most
likely due to the quantized interactions leading to a discrete set of
transferred momenta. A separate experimental confirmation of this
interpretation for double-slit interferometry of photons has been given by the
group of Steinberg.

11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int