Recovering the lost steerability of quantum states within non-Markovian environments by utilizing quantum partially collapsing measurements

TL;DR

This paper explores how to recover quantum steerability lost in non-Markovian environments using weak measurements and reversals, demonstrating effective restoration of steerability and fidelity.

Contribution

It introduces a physical scheme employing weak measurements and reversals to recover quantum steerability in non-Markovian environments, which was previously unachievable.

Findings

Quantum entanglement can resurge in non-Markovian environments.

Quantum steering cannot be recovered solely by entanglement resurgence.

The proposed scheme effectively restores steerability and fidelity, especially with stronger weak measurements.

Abstract

In this Letter, we mainly investigate the dynamic behavior of quantum steering and how to effectively recover the lost steerability of quantum states within non-Markovian environments. We consider two different cases (one-subsystem or all-subsystem interacts with the dissipative environments), and obtain that the dynamical interaction between system initialized by a Werner state and the non-Markovian environments can induce the quasi-periodic quantum entanglement (concurrence) resurgence, however, quantum steering cannot retrieve in such a condition. And we can obtain that the resurgent quantum entanglement cannot be utilized to achieve quantum steering. Subsequently, we put forward a feasible physical scheme for recovering the steerability of quantum states within the non-Markovian noises by prior weak measurement on each subsystem before the interaction with dissipative environments followed by post weak measurement reversal. It is shown that the steerability of quantum states and the fidelity can be effectively restored. Furthermore, the results show that the larger the weak measurement strength is, the better the effectiveness of the scheme is. Consequently, our investigations might be beneficial to recover the lost steerability of quantum states within the non-Markovian regimes.