Quantum information theory. Mathematical physics. Convex analysis.
Main publications:
M. E. Shirokov, “The Holevo capacity of infinite dimensional channels and the additivity problem”, Comm. Math. Phys., 262 (2006), 137–159
M.E. Shirokov, “Continuity of the von Neumann entropy”, Comm. Math. Phys., 296:3 (2010), 625–654
V. Yu. Protasov, M. E. Shirokov, “Generalized compactness in linear spaces and its applications”, Sbornik:Mathematics, 200:5 (2009), 697–722
M. E. Shirokov, “Strong convergence of quantum channels: Continuity of the Stinespring dilation and discontinuity of the unitary dilation”, Journal of Mathematical Physics, 61 (2020), 82204
M. E. Shirokov, “On channels with positive quantum zero-error capacity having vanishing n-shot capacity”, Quantum Inf. Process., 14:8 (2015), 3057–3074