Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: ND Tadpoles as New String States and Quantum Mechanical Particle-Wave
  Duality from World-Sheet T-Duality   We consider new objects in bosonic open string theory -- ND tadpoles, which
have N(euman) boundary conditions at one end of the world-sheet and D(irichlet)
at the other, must exist due to s-t duality in a string theory with both NN
strings and D-branes. We demonstrate how to interpolate between N and D
boundary conditions. In the case of mixed boundary conditions the action for a
quantum particle is induced on the boundary. Quantum-mechanical particle-wave
duality, a dual description of a quantum particle in either the coordinate or
the momentum representation, is induced by world-sheet T-duality. The famous
relation between compactification radii is equivalent to the quantization of
the phase space area of a Planck cell. We also introduce a boundary operator -
a ``Zipper'' which changes the boundary condition from N into D and vice versa.

37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc