Revealing non-classicality of inaccessible objects

Understand

Some physical objects are hardly accessible to direct experimentation.

• It is then desirable to infer their properties based solely on the interactions they have with systems over which we have control.
• In this spirit, here we introduce schemes for assessing the non-classicality of the inaccessible objects as characterised by quantum discord.
• We consider two probes individually interacting with the inaccessible object, but not with each other.