Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Pseudo Euclidean-Signature Harmonic Oscillator, Quantum Field Theory and
  Vanishing Cosmological Constant   The harmonic oscillator in pseudo euclidean space is studied. A
straightforward procedure reveals that although such a system may have negative
energy, it is stable. In the quantized theory the vacuum state has to be
suitably defined and then the zero-point energy corresponding to a
positive-signature component is canceled by the one corresponding to a
negative-signature component. This principle is then applied to a system of
scalar fields. The metric in the space of fields is assumed to have signature
(+ + + ... - - -) and it is shown that the vacuum energy, and consequently the
cosmological constant, are then exactly zero. The theory also predicts the
existence of stable, negative energy field excitations (the so called "exotic
matter") which are sources of repulsive gravitational fields, necessary for
construction of the time machines and Alcubierre's hyperfast warp drive.

0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga