714 citations · 4.3k across the 128 of their papers we have counts for
19 papers · 1 filter
Fixed Points of Completely Positive Trace-Preserving Maps in Infinite Dimension
Roderich Tumulka, Jonte Weixler
Completely positive trace-preserving maps , also known as quantum channels, arise in quantum physics as a description of how the density operator of a system changes in a gi…
How a Space-Time Singularity Helps Remove the Ultraviolet Divergence Problem
Joscha Henheik, Bipul Poudyal, Roderich Tumulka
Particle creation terms in quantum Hamiltonians are usually ultraviolet divergent and thus mathematically ill defined. A rather novel way of solving this problem is based on imposi…
On the Problem of Defining Charge Operators for the Dirac Quantum Field
Pablo Costa Rico, Roderich Tumulka
It is well known how to define the operator for the total charge (i.e., positron number minus electron number) on the standard Hilbert space of the second-quantized Dirac equat…
Canonical Typicality For Other Ensembles Than Micro-Canonical
Stefan Teufel, Roderich Tumulka, Cornelia Vogel
We generalize Lévy's lemma, a concentration-of-measure result for the uniform probability distribution on high-dimensional spheres, to a much more general class of measures, so-cal…
Typical Macroscopic Long-Time Behavior for Random Hamiltonians
Stefan Teufel, Roderich Tumulka, Cornelia Vogel
We consider a closed macroscopic quantum system in a pure state evolving unitarily and take for granted that different macro states correspond to mutually orthogonal subspace…
Another Proof of Born's Rule on Arbitrary Cauchy Surfaces
Sascha Lill, Roderich Tumulka
In 2017, Lienert and Tumulka proved Born's rule on arbitrary Cauchy surfaces in Minkowski space-time assuming Born's rule and a corresponding collapse rule on horizontal surfaces r…