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quant-ph2026
Robustness-based bounds for approximate joint realizations of incompatible quantum channels
Shintaro Minagawa, Ryo Takakura, Kensei Torii
Several quantum channels may fail to admit an exact joint realization, a property known as incompatibility. Channel incompatibility unifies various quantum limitations, such as mea…
quant-ph2026
Multivariate Rényi divergences characterise betting games with multiple lotteries
Andrés F. Ducuara, Erkka Haapasalo, Ryo Takakura
We provide an operational interpretation of the multivariate Rényi divergence in terms of economic-theoretic tasks based on betting, risk aversion, and multiple lotteries. We show…