Quantum Fisher Information: Probe to Measure Fractional Evolution

Witnessing Quantum Correlations in a Hybrid Qubit‐Qutrit System Under Intrinsic Decoherence

“…[1] Given the importance of this topic, quantum correlations beyond entanglement constitute a fascinating theme that has remained a hotly debated topic among quantum information and DOI: 10.1002/prop.202300032 computation analysts over the past decade. [2,3] Quantum entanglement and correlations beyond it are well-known as good resources in several areas of quantum information science, including the realization of Markovianity and non-Markovianity in open quantum systems, [4][5][6][7][8][9] quantum teleportation, [10][11][12] fractional computations, [13] quantum key distribution, [14] secure Big Data, [15] quantum speed limit time, [16] and so forth. For this reason, the search for such non-classical correlations that exist beyond entanglement remains a fascinating new frontier for quantum theorists and experimentalists to explore.…”

Optimal initial states for quantum parameter estimation based on Jaynes–Cummings model [Invited]

“…They found that the QFI is related to the excitation number of the probe and is independent of the parameters to be estimated, and they provided an optimal measurement strategy [43] . More recently, Allati et al extended the parameter estimation problem in the J-C model to estimate the weight and initial phase of the initial state and used Shannon entropy to investigate the relationship between quantum entanglement and QFI [44] . Moreover, there have been efforts to study multiparameter estimation in the J-C model.…”