Written by Muhammad Rohail T.
Does information always degrade predictably when passing through combined quantum systems. Recent calculations demonstrate that, contrary to classical expectations, the rate of information loss in these systems cannot be determined solely from the individual components, specifically violating the tensorization property of the strong data processing inequality for certain quantum divergences. This means ηD(E1 ⊗E2, σ1 ⊗σ2) > max ηD(E1, σ1), ηD(E2, σ2) for specific quantum divergences, chall...