48 citations · 111 across the 6 of their papers we have counts for
6 papers
Thermal equilibrium states for quantum fields on non-commutative spacetimes
Gandalf Lechner, Jan Schlemmer
Fully Poincaré covariant quantum field theories on non-commutative Moyal Minkowski spacetime so far have been considered in their vacuum representations, i.e. at zero temperature.…
The current density in quantum electrodynamics in external potentials
Jan Schlemmer, Jochen Zahn
We review different definitions of the current density for quantized fermions in the presence of an external electromagnetic field. Several deficiencies in the popular prescription…
On the equivalence of two deformation schemes in quantum field theory
Gandalf Lechner, Jan Schlemmer, Yoh Tanimoto
Two recent deformation schemes for quantum field theories on the two-dimensional Minkowski space, making use of deformed field operators and Longo-Witten endomorphisms, respectivel…
Local Thermal Equilibrium States and Quantum Energy Inequalities
Jan Schlemmer, Rainer Verch
In this paper we investigate the energy distribution of states of a linear scalar quantum field with arbitrary curvature coupling on a curved spacetime which fulfill some local the…
Local Thermal Equilibrium States and Unruh Detectors in Quantum Field Theory
Jan Schlemmer
In the framework of local thermodynamic equilibrium by Buchholz, Ojima and Roos, a class S_x of observables, whose members are supposed to model idealized measurements of thermal p…
Local Temperature in Curved Spacetime
Detlev Buchholz, Jan Schlemmer
A physically meaningful local concept of temperature is introduced in quantum field theory on curved spacetime and applied to the example of a massless field on de Sitter space. It…