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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…