Robustness of Interferometric Power to Sudden Death

TL;DR

This paper investigates how interferometric power, a quantum correlation measure, remains more robust than entanglement under various dissipative Markovian environments, making it advantageous for quantum metrology.

Contribution

It demonstrates that interferometric power decays asymptotically in environments where entanglement experiences sudden death, highlighting its robustness for quantum sensing.

Findings

Interferometric power decays asymptotically under dephasing, depolarizing, and amplitude damping.

Entanglement exhibits sudden death in the studied environments.

Quantum metrology benefits from using interferometric power due to its robustness.

Abstract

We study the dissipative dynamics of interferometric power as a discordlike measure in Markovian environments, such as dephasing, depolarizing, and generalized amplitude damping. Moreover, we compare the dynamics of interferometric power and entanglement by choosing proper initial conditions. Our study shows that in all cases where the sudden death of entanglement appears, interferometric power decays asymptotically. Therefore, quantum metrology based on interferometric power is more robust than entanglement.