Perturbative approach to higher derivative theories with fermions

2002/06/30 by Tai-Chung Cheng, Pei-Ming Ho, Mao-Chuang Yeh · 2 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Noncommutative and Quantum Gravity Theories #hep-th

paper · pdf · doi:10.1103/physrevd.66.085015

published as Phys.Rev. D66 (2002) 085015 · Latex, 21 pages, minor modification, ref. added

arxiv created 2002/07/03 · openalex publication_date 2002/10/21 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We extend the perturbative approach developed in an earlier work to deal with Lagrangians which have arbitrary higher order time derivative terms for both bosons and fermions. This approach enables us to find an effective Lagrangian with only first time derivatives order by order in the coupling constant. As in the pure bosonic case, to the first order, the quantized Hamiltonian is bounded from below whenever the potential is. We show in the example of a single complex fermion that higher derivative interactions result in an effective mass and change of vacuum for the low energy modes. The supersymmetric noncommutative Wess-Zumino model is considered as another example. We also comment on the higher derivative terms in Witten's string field theory and the effectiveness of level truncation.

Citations

• Quantization of Gauge Systems
• Strings in background electric field, space/time noncommutativity and a new noncritical string theory
• Space-time noncommutativity, discreteness of time and unitarity
• Renormalization of higher-derivative quantum gravity

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