3 papers
hep-th2026
A Note on Coadjoint Orbits for Multifermion Systems
V. P. Nair
The coadjoint orbit action for a multifermion system, as an exact description of its dynamics, is considered. A parametrization of the variables involved is given which facilitates…
hep-th2026
On Quantum Field Theory and Observers
V. P. Nair
A generalization of the coadjoint orbit action describes the dynamics of an observer (or instrument). We consider how this fits in with the view of observables in field theory bein…
hep-th2025
Spectral functions at nonzero temperature
V. P. Nair, Robert D. Pisarski
We present a straightforward derivation of the spectral representation of a scalar field at nonzero temperature, assuming that the field is relativistically invariant in vacuum. Th…