Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Planar Quantum Mechanics: an Intriguing Supersymmetric Example   After setting up a Hamiltonian formulation of planar (matrix) quantum
mechanics, we illustrate its effectiveness in a non-trivial supersymmetric
example. The numerical and analytical study of two sectors of the model, as a
function of 't Hooft's coupling $\lambda$, reveals both a phase transition at
$\lambda=1$ (disappearence of the mass gap and discontinuous jump in Witten's
index) and a new form of strong-weak duality for $\lambda \to 1/\lambda$.

32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int