The escalating teletraffic growth imposed by the proliferation of smartphones and tablet computers outstrips capacity increase wireless communications networks. Furthermore, it results in substantially increased carbon dioxide emissions. As a powerful countermeasure, case full-rank channel matrices, MIMO techniques are potentially capable linearly increasing or decreasing transmit power upon commensurately number antennas. Hence, recent concept large-scale (LS-MIMO) systems has attracted...

Artificial intelligence (AI) is gaining increasing attention from business leaders today. As a primary AI tool, chatbots have seen use by companies to support customer service. An understanding of how are used essential for improving Based on the relevant literature, this study examined impacts chatbot-enabled agility (namely, internal and external chatbot agility) service performance explored antecedents perspective information technology (both routine innovative use). We collected data 294...

We study the effect of Dzyaloshinskii-Moriya (DM) interaction on pairwise quantum discord, entanglement, and classical correlation in anisotropic XY spin-half chain. Analytical expressions for both correlations are obtained from spin-spin functions. show that these quantities exhibit various behaviors relation to relative strengths DM interaction, anisotropy magnetic intensity. observe non-analyticities derivatives with respect intensity at critical point, consideration interaction.

Abstract An enhanced understanding of the innovative use artificial intelligence (AI) is essential for organizations to improve work design and daily business operations. This study's purpose offer insights into how AI can transform organizations' practices through diving deeply its in context a primary tool, chatbot, examining antecedents by conceptualizing employee trust as multidimensional construct exploring employees' perceived benefits. In particular, we have conceptualized chatbots...

The degree of non-Markovian behavior a damped Jaynes-Cummings model with detuning is investigated. Our attention focused on the effects and width Lorentzian spectral density behavior. It found that an increase can make information exchange between qubit reservoir more rapid, this leads to in non-Markovianity for some cases, while always decrease non-Markovianity.

We propose an effective method which can simplify the optimization of increase trace distance over all pairs initial states in calculating non-Markovianity $\mathcal{N}$ for single channel open systems. For amplitude damping channel, we unify results Breuer $et$ $al$. [Phys. Rev. Lett. \bf 103\rm, 210401 (2009)] large-detuning case and Xu A 81\rm, 044105 (2010)] resonant case; furthermore, general off-resonant cases obtain a very tight lower bound $\mathcal{N}$. As another application our...

Neural networks are susceptible to data inference attacks such as the model inversion attack and membership attack, where attacker could infer reconstruction of a sample from confidence scores predicted by target classifier. In this paper, we propose unified approach, namely purification framework, defend attacks. It purifies score vectors classifier reducing their dispersion. The purifier can be further specialized in defending particular via adversarial learning. We evaluate our approach...

In the context of rapid development modern society, college students, as younger generation, no longer merely show traditional respect and care when interacting with new elderly. The elderly possess abundant resources in life experience wisdom, which complement vitality innovative characteristics students. Through communication interaction elderly, students can draw valuable wisdom from them, helping themselves better adapt to social changes face challenges. At same time, provide technical...

We investigate the dynamic behaviors of quantum discord for a central two-qubit system coupled to an $\mathit{XY}$-spin-chain environment. In weak-coupling regime, we show that two qubits can become minimized rapidly close critical point phase transition. By considering are initially prepared in Werner state, study evolution and entanglement under same conditions. Our results imply disappear completely after finite time, while decreases tends be stable value according initial-state parameter...

We consider a model of an optical cavity with nonequilibrium reservoir consisting beam identical two-level atom pairs (TLAPs) in the general X state. find that coherence multiparticle plays central role on potential work capability cavity. show no matter whether there are quantum correlations each TLAP (including entanglement and discord) or not, TLAPs has effect Additionally, constructive destructive interferences could be induced to influence by adjusting only relative phase, which have...

We propose a scheme of feed-forward control and its reversal for protecting quantum state against decoherence. Before the noise channel our pre-weak measurement are simply to change protected into almost immune channel, after reversed operations post-weak measurements restore state. Unlike most previous protection schemes, ours only concerns does not care about show that can effectively protect unknown states, nonorthogonal entangled states amplitude damping noise. Our has merit heavy noise,...

Abstract We study the quantum speed limit time (QSLT) of a coupled system consisting central spin and its surrounding environment is described by general XY spin-chain model. For initial pure state, we find that local anomalous enhancement QSLT occurs near critical point. In addition, investigate for arbitrary time-evolution state in whole dynamics process will decay monotonously rapidly at large size These behaviors vicinity can be used to indicate phase transition Especially XX...

The thermometry precision of a sample is question both fundamental and technological importance. In this paper, we consider ring-structure system as our probe to estimate the temperature bath. Based on Markovian master equation probe, calculate quantum Fisher information (QFI) at any time. We find that for thermal equilibrium thermometry, ferromagnetic structure can measure lower bath with higher compared nonstructure while dynamical antiferromagnetic make QFI in process much larger than...

The entanglement evolution of two qubits under local, single-, and two-sided noisy channels is investigated. It found that for all pure initial states, the a one-sided channel completely determined by maximal trace distance which main element to construct measure non-Markovianity. For case, when are initially prepared in general class either or mixed, can be expressed as product channels' action on maximally entangled state.

We investigate the heat transport between two nonthermal reservoirs based on a microscopic collision model. consider bipartite system consisting of identical subsystems, and each subsystem interacts with its own local reservoir, which consists large collection initially uncorrelated ancillas. Then is formed by sequence pairwise collisions (intersubsystem subsystem-local reservoir). In this paper we kinds reservoir's initial states: thermal state coherence whose diagonal elements are same as...

We consider a model of two driven and collectively damped atoms with different quantum feedbacks. find that the steady entanglement depends on initial condition in case symmetric feedback but is independent nonsymmetric feedback. also process transition from to feedback, between discontinuous. Without (symmetric case), subspace will be very small; then we apply just one (nonsymmetric increase greatly, which can reach $C\ensuremath{\approx}0.82$. It interesting if withdraw strong remain,...

We consider the entanglement of two remote qubits induced by local interaction with two-mode nonclassical state fields. investigate transfer from different fields to a pair separable and mixed qubits. find that no matter what qubit subsystem is initially prepared in, at specific time $gt\ensuremath{\simeq}11.07$ Bell can be almost completely transferred subsystem, i.e., drive an very into pure highly entangled suitable for quantum information processing. For coherent...

The compact precise tilt positioning mechanism (PTPM) determines the performance of inter-satellite optical communication systems. This paper presents a novel structural design PTPM in which movement is implemented by elastic deformation flexure ring. ring promises zero friction and clearance. stiffness model flexible was built based on an analysis mechanics. Then dynamic presented Lagrange equation. A modal experimental investigation were performed. error between three methods less than 10%.

We present several protocols for reliable quantum state transfer through an XY spin chain. Among these is a simple two-spin encoding that achieves remarkably high-fidelity arbitrary state. The fidelity of the also decreases slowly with increasing chain length. Furthermore, reliability can be increased by taking advantage local memory and/or confirming using second simplicity and high makes this candidate near-future experiments including test speed limit.

The identification of simple sequence repeat (SSR) markers associated with salt tolerance in cotton contributes to molecular assisted selection (MAS), which can improve the efficiency traditional breeding.In this study, 134 samples upland cultivars were selected.The seedling emergence rates tested under 0.3% NaCl stress.A total 74 SSR used scan genomes these samples.To identify tolerance, an association analysis was performed between and using TASSEL 2.1, based on genetic structure Structure...