Temporal Steering in Four Dimensions with applications to coupled qubits and magnetoreception

TL;DR

This paper explores temporal steering in four-dimensional quantum systems, analyzing its dynamics and applications to a radical pair model of magnetoreception, revealing strong non-Markovian effects due to nuclear spin interactions.

Contribution

It introduces a detailed study of temporal steering robustness in four-dimensional systems and applies it to magnetoreception models, highlighting non-Markovian dynamics.

Findings

Strong non-Markovianity in radical pair model

Temporal steering robustness varies with system dynamics

Interactions with nuclear spins influence quantum correlations

Abstract

Einstein-Podolsky-Rosen (EPR) steering allows Alice to remotely prepare a state in some specific bases for Bob through her choice of measurements. The temporal analogue of EPR steering, temporal steering, also reveals the steerability of a single system between different times. Focusing on a four-dimensional system, here we investigate the dynamics of the temporal steering measures, the temporal steering robustness, using 5 mutually unbiased bases. As an example of an application, we use these measures to examine the temporal correlations in a radical pair model of magnetoreception. We find that, due to interactions with a static nuclear spin, the radical pair model exhibits strong non-Markovianity.