3 papers
quant-ph2026
Randomized simulation of quantum channels using small ancilla
Marcin Kotowski, MichaÅ Kotowski
We study the problem of implementing a quantum channel using a small ancilla with classical randomization and postselection on an output failure flag. The simulation is probabilist…
quant-ph2025
Pretty-good simulation of all quantum measurements by projective measurements
MichaÅ Kotowski, MichaÅ Oszmaniec
In quantum theory general measurements are described by so-called Positive Operator-Valued Measures (POVMs). We show that in -dimensional quantum systems an application of depol…
math.PR2024
The global and local limit of the continuous-time Mallows process
RadosÅaw Adamczak, MichaÅ Kotowski
Continuous-time Mallows processes are processes of random permutations of the set whose marginal at time is the Mallows distribution with parameter . Rece…