Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Absorption Probabilities for the Two-Barrier Quantum Walk   Let p_j^(n) be the probability that a Hadamard quantum walk, started at site
j on the integer lattice {0,...,n}, is absorbed at 0. We give an explicit
formula for p_j^(n). Our formula proves a conjecture of John Watrous,
concerning an empirically observed linear fractional recurrence relation for
the numbers p_1^(n).

8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org