Quantum Fisher information matrix (QFIM) is a core concept in theoretical quantum metrology due to the significant importance of Cramér-Rao bound parameter estimation. However, studies recent years have revealed wide connections between QFIM and other aspects mechanics, including thermodynamics, phase transition, entanglement witness, speed limit non-Markovianity. These indicate that more than metrology, but rather fundamental quantity mechanics. In this paper, we summarize properties...

We establish an information-theoretic approach for quantitatively characterizing the non-Markovianity of open quantum processes. Here, Fisher information (QFI) flow provides a measure to statistically distinguish Markovian and non-Markovian A basic relation between QFI is unveiled dynamics systems. For class time-local master equations, exactly analytic solution shows that each fixed time decomposed into additive subflows according different dissipative channels.

Rayleigh's criterion for resolving two incoherent point sources has been the most influential measure of optical imaging resolution over a century. In context statistical image processing, violation is especially detrimental to estimation separation between sources, and modern farfield superresolution techniques rely on suppressing emission close enhance localization precision. Using quantum optics, metrology, analysis, here we show that, even if emit simultaneously, measurements with linear...

We analyze the optimal measurements accessing classical correlations in arbitrary two-qubit states. Two-qubit states can be transformed into canonical forms via local unitary operations. For forms, we investigate probability distribution of measurements. The measurement is found to centralized vicinity a specific von Neumann measurement, which call maximal-correlation-direction (MCDM). prove that for with zero-discord and maximally mixed marginals, MCDM very measurement. Furthermore, give an...

Abstract This paper examines the challenge of building customer loyalty in e-tailing environment. It role relationship quality (RQ) formation Internet retailing. In a departure from existing research, RQ is treated as disaggregated, multidimensional construct, rather than global one, consisting satisfaction (RS), trust, and commitment. Based on an online survey 491 grocery shoppers, structural equation modelling used to test influence different dimensions e-loyalty. Results show that RS,...

Purpose The purpose of this paper is to provide a critical synthesis research conducted within the hospitality and tourism industries in response impact COVID-19 pandemic, identify key perspectives themes relating recovery resilience two sectors put forward recommendations that help address organizational consumer behavior changes produced by pandemic. Design/methodology/approach This study adopted reflection approach identify, select synthesize relevant based on which are drawn. Findings...

The quantum multiparameter estimation is very different from the classical due to Heisenberg's uncertainty principle in mechanics. When optimal measurements for parameters are incompatible, they cannot be jointly performed. We find a correspondence relationship between inaccuracy of measurement estimating unknown parameter with error context relations. Taking this as bridge, we incorporate into by giving trade-off relation inaccuracies parameters. For pure states, tight, so it can reveal...

We consider a process of parameter estimation in spin-$j$ system surrounded by quantum-critical spin chain. Quantum Fisher information lies at the heart task. employ Ising chain transverse field as environment which exhibits quantum phase transition. decays with time almost monotonously when reaches critical point. By choosing fixed or taking average, one can see presents sudden drop Different initial states are considered. The phenomenon that information, namely, precision estimation,...

Fragile quantum features such as entanglement are employed to improve the precision of parameter estimation and a consequence gain becomes vulnerable noise. As an established tool subdue noise, error correction is unfortunately overprotective because enhancement can still be achieved even if states irrecoverably affected, provided that Fisher information, which sets ultimate limit metrological schemes, preserved attained. Here, we develop theory robust schemes preserve information instead...

In the adiabatic perturbation theory, Berry curvature is related to generalized force, and quantum metric tensor linked with energy fluctuation. While former tested numerous numerical results experimental realizations, latter less considered. Quantum Fisher information, key precision measurement, four times tensor. It difficult relate information some physical observable. One interesting candidate square of symmetric logarithmic derivative, which usually tough obtain both theoretically...

Abstract Despite its acknowledged importance, there are few rigorous empirical studies examining Internet retail service quality. An exception is the development of E-S-QUAL scale by Parasuraman, Zeithaml, and Malhotra (2005 A., V.A. Malhotra, A. 2005. E-S-QUAL: A multiple-item for assessing electronic Journal Service Research, 7(3): 213–233. [Crossref], [Web Science ®] , [Google Scholar]). Whilst demonstrated good psychometric properties in original study, lacks external validation. This...

We show that Breuer-Laine-Piilo (BLP) non-Markovianity cannot capture the dynamical information in non-unital aspect of quantum dynamics. Moreover, we provide a measure on effect non-unitality processes infinitesimal non-divisibility. This can be used as supplement to BLP for processes. A degree behavior is also given this paper.

Against the backdrop of automobile electrification, an increasing number battery-swapping stations for electric vehicles have been launched to address issue slow battery charging under cold temperature conditions. However, due separation discharging and processes lithium-ion batteries (LIBs) at swapping stations, circulation across different operating data become fragmented, making it difficult accurately identify state-of-health (SOH). This study proposes a BiLSTM-Transformer framework that...

With the global aging population, an increasing number of researchers are interested in intertemporal choice issues faced by older adults. Previous studies have examined how age-related differences time perception affect choices. However, impact strategy on decision-making among adults remains unclear. This study was designed to examine timing influence while also exploring possible mechanisms. We manipulated preferences through priming two experiments (Experiment 1, n = 160; Experiment 2,...