Quantifying the resource of sharing a reference frame

Abstract

We define a new quantity called refbit, which allows one to quantify the resource of sharing a reference frame in quantum communication protocols. By considering both asymptotic and nonasymptotic protocols we find relations between refbits and other communication resources. We also consider the same resources in encoded, reference-frame independent, form. This allows one to rephrase and unify previous work on phase references, reference frames, and superselection rules.

Updated title as PRA did not accept the word "refbit" in the title: PRA accepts neither neologisms (="a meaningless word coined by a psychotic", according to Webster), nor novophasms

References in corpus (2)

• Classical and quantum communication without a shared reference frame
• Decoherence-full subsystems and the cryptographic power of a private shared reference frame

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