Ghost-free higher-derivative theory

Abstract

We present an example of the quantum system with higher derivatives in the Lagrangian, which is ghost-free: the spectrum of the Hamiltonian is bounded from below and unitarity is preserved.

13 pages, 1 figure

References in corpus (4)

• Benign vs malicious ghosts in higher-derivative theories
• Dirac Quantization of the Pais-Uhlenbeck Fourth Order Oscillator
• Renormalizable supersymmetric gauge theory in six dimensions
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