Quantum information reclaiming after amplitude damping
Laleh Memarzadeh, Carlo Cafaro, Stefano Mancini
TL;DR
This paper explores how to optimally recover quantum information lost due to amplitude damping by measuring the environment, focusing on the best correction strategies for 2D and 3D quantum systems.
Contribution
It identifies the optimal environmental measurements for quantum information correction and analyzes how correction performance varies with system dimension.
Findings
Optimal measurements depend on system dimension
Entanglement fidelity varies with measurement choice
Maximum fidelity achieved by specific measurements
Abstract
We investigate the quantum information reclaim from the environment after amplitude damping has occurred. In particular we address the question of optimal measurement on the environment to perform the best possible correction on two and three dimensional quantum systems. Depending on the dimension we show that the entanglement fidelity (the measure quantifying the correction performance) is or is not the same for all possible measurements and uncover the optimal measurement leading to the maximum entanglement fidelity.
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