3 papers
quant-ph2025
Improving shadow estimation with locally-optimal dual frames
Keijo Korhonen, Stefano Mangini, Joonas Malmi +2
Accurate estimation of observables in quantum systems is a central challenge in quantum information science, yet practical implementations are fundamentally constrained by the limi…
quant-ph2024
Enhanced observable estimation through classical optimization of informationally over-complete measurement data -- beyond classical shadows
Joonas Malmi, Keijo Korhonen, Daniel Cavalcanti +1
In recent years, informationally complete measurements have attracted considerable attention, especially in the context of classical shadows. In the particular case of informationa…
gr-qc2019
Fermionic decay of a massive scalar in the early Universe
Juho Lankinen, Joonas Malmi, Iiro Vilja
We derive a curved space generalization of a scalar to fermion decay rate with a Yukawa coupling in expanding Friedmann-Robertson-Walker universes. This is done using the full theo…