Quantifying coherence with respect to general quantum measurements

Understand

Coherence is a cornerstone of quantum theory and a prerequisite for the advantage of quantum technologies.

• In recent work, the notion of coherence with respect to a general quantum measurement (POVM) was introduced and embedded into a resource-theoretic framework that generalizes the standard resource theory of coherence.
• In particular, POVM-incoherent (free) states and operations were established.
• In this work, we explore features of this framework which arise due to the rich structure of POVMs compared to projective measurements.