Supersymmetric field theory with benign ghosts
arXiv:1306.6066 · doi:10.1088/1751-8113/47/5/052001
Abstract
We construct a supersymmetric (1+1)-dimensional field theory involving extra derivatives and associated ghosts: the spectrum of the Hamiltonian is not bounded from below, neither from above. In spite of that, there is neither classical, nor quantum collapse and unitarity is preserved.
Final version published in J.Phys. A; 8 pages, 3 figures
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