Quantifying Magnetic Sensitivity of Radical Pair Based Compass by Quantum Fisher Information.

ABSTRACT: The radical pair (RP) based compass is considered as one of the principal models of avian magnetoreception. Different from the conventional approach where the sensitivity of RP based compass is described by the singlet yield, we introduce the quantum Fisher information (QFI), which represents the maximum information about the magnetic field's direction extracted from the RP state, to quantify the sensitivity of RP based compass. The consistency between our results and experimental observations suggests that the QFI may serve as a measure to describe the sensitivity of RP based compass. Besides, within the framework of quantum metrology, we give two specific possible measurement schemes and find that the conventional singlet yield is corresponding to the measurement of total angular momentu

SUBMITTER: Guo LS 

PROVIDER: S-EPMC5517522 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature