arXiv subjects

Avinash

Publications and source records attributed to Avinash.

2 recordsLinked to original sources

arXiv2019

Renormalisation in Open Quantum Field theory II: Yukawa theory and PV reduction

We compute Passarino-Veltman (PV) reduction for tensor loop integrals, that appear in open field theories. We apply these results to open-Yukawa theory and compute the self-energy correction of the fields. We found that non-local divergences show up in the one loop correction to the fermionic self-energy. These non-local divergences do not disappear even if the tree level theory is chosen to satisfy the trace preserving condition of the density matrix.

hep-th↗

arXiv2017

Renormalization in Open Quantum Field theory I: Scalar field theory

While the notion of open quantum systems is itself old, most of the existing studies deal with quantum mechanical systems rather than quantum field theories. After a brief review of field theoretical/path integral tools currently available to deal with open quantum field theories, we go on to apply these tools to an open version of $\phi^3$ + $\phi^4$ theory in four spacetime dimensions and demonstrate its one loop renormalizability (including the renormalizability of the Lindblad structure).

hep-th↗