Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dissipative Mechanics Using Complex-Valued Hamiltonians   We show that a large class of dissipative systems can be brought to a
canonical form by introducing complex co-ordinates in phase space and a
complex-valued hamiltonian. A naive canonical quantization of these systems
lead to non-hermitean hamiltonian operators. The excited states are unstable
and decay to the ground state . We also compute the tunneling amplitude across
a potential barrier.

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The categories of this paper are: eess
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The categories of this paper are: comp-gas
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The categories of this paper are: dg-ga
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The categories of this paper are: adap-org
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The categories of this paper are: q-bio
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The categories of this paper are: physics
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The categories of this paper are: hep-lat
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The categories of this paper are: patt-sol
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The categories of this paper are: q-alg
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The categories of this paper are: hep-ex
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The categories of this paper are: plasm-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: nlin
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The categories of this paper are: atom-ph
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The categories of this paper are: funct-an