3 papers
quant-ph2026
Stronger Welch Bounds and Optimal Approximate -Designs
Riccardo Castellano, Dmitry Grinko, Sadra Boreiri +2
A fundamental question asks how uniformly finite sets of pure quantum states can be distributed in a Hilbert space. The Welch bounds address this question, and are saturated by …
quant-ph2024
Parallel ergotropy: Maximum work extraction via parallel local unitary operations
Riccardo Castellano, Ranieri Nery, Kyrylo Simonov +1
Maximum quantum work extraction is generally defined in terms of the ergotropy functional, no matter how experimentally complicated is the implementation of the optimal unitary all…
quant-ph2024
Extended local ergotropy
Riccardo Castellano, Donato Farina, Vittorio Giovannetti +1
A fundamental problem in quantum thermodynamics is to properly quantify the work extractable from out-of-equilibrium systems. While for closed systems, maximum quantum work extract…