Maximally coherent states

Understand

Relative entropy measure quantifying coherence, a key property of quantum system, is proposed recently.

• In this note, we investigate the maximally coherent state (MCS) with respect to relative entropy measure.
• %(denoted by $\mathcal C_{RE}$)%.
• We show that there are not mixed maximally coherent states and give a complete characterization of pure maximally coherent states.