Supersymmetry vs ghosts

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dc.creatorRobert, Didier
dc.creatorSmilga, Andrei. V.
dc.date2006-11-10
dc.date2008-03-27
dc.date.accessioned2026-07-07T11:59:49Z
dc.date.available2026-07-07T11:59:49Z
dc.descriptionWe consider the simplest nontrivial supersymmetric quantum mechanical system involving higher derivatives. We unravel the existence of additional bosonic and fermionic integrals of motion forming a nontrivial algebra. This allows one to obtain the exact solution both in the classical and quantum cases. The supercharges $Q, \bar Q$ are not anymore Hermitially conjugate to each other, which allows for the presence of negative energies in the spectrum. We show that the spectrum of the Hamiltonian is unbounded from below. It is discrete and infinitely degenerate in the free oscillator-like case and becomes continuous running from $-\infty$ to $\infty$ when interactions are added. Notwithstanding the absence of the ground state, there is no collapse, which suggests that a unitary evolution operator may be defined.
dc.descriptionFinal version to be published in JMP (April, 2008)
dc.identifierhttps://arxiv.org/abs/math-ph/0611023
dc.identifierhttp://arxiv.org/abs/math-ph/0611023
dc.identifierJ.Math.Phys.49:042104,2008
dc.identifierdoi:10.1063/1.2904474
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/206698
dc.subjectMathematical Physics
dc.subjectHigh Energy Physics - Theory
dc.titleSupersymmetry vs ghosts
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