Energy & Ergotropy
Stored energy E(τ)/N: –
Classical (g=0) E_c: –
Quantum advantage: –×
Max charging power: –
Ergotropy W: –
Quantum batteries (Alicki-Fannes 2013): N qubits, charger H_c=Ω·Σσ_z, interactions H_int=g·Σσ_x⊗σ_x. Entangled charging: collective operations. Advantage: P_max ∝ N² vs N for classical. Ergotropy = max extractable work. Real proposals: SYK model (2020), photonic platforms.