Deterministic joint remote preparation of an arbitrary two-qubit state in the presence of noise

Using two tripartite Greenberger-Horne-Zeilinger （GHZ） states as the shared channels, we investigate the noise effects on the deterministic joint remote preparation of an arbitrary two-qubit state. By unitary matrix decomposition procedure, we first construct the quantum logic circuit of the deterministic joint remote state preparation protocol. Then, we analytically derive the fidelity and the average fidelity for the deterministic joint remote preparation of an arbitrary two- qubit state and of four types of special two-qubit states under the influence of the Pauli noises. It is found that the fidelity depends on the noise types, the qubit-environment coupling strength, and the state to be remotely prepared. Moreover, even if the two GHZ channels are subject to the same environmental noises, the average fidelities for remotely preparing different two-qubit states display different time evolution behaviors. The remote preparation of the identical two-qubit states also shows that the average fidelities affected by different noisy environments exhibit different evolution actions.

Joint remote preparation of an arbitrary five-qubit Brown state via non-maximally entangled channels

We firstly present a novel scheme for deterministic joint remote state preparation of an arbitrary five-qubit Brown state using four Greenberg-Horme-Zeilinger （GHZ） entangled states as the quantum channel. The success probability of this scheme is up to 1, which is superior to the existing ones. Moreover, the scheme is extended to the generalized case where three-qubit and four-qubit non-maximally entangled states are taken as the quantum channel. We simultaneously employ two common methods to reconstruct the desired state. By comparing these two methods, we draw a conclusion that the first is superior to the second-optimal positive operator-valued measure only taking into account the number of auxiliary particles and the success probability.

Efficient schemes of joint remote preparation with a passive receiver via EPR pairs

Novel schemes are put forward to execute the joint remote preparation of an arbitrary two-qubit state with a pas- sive receiver via EPR pairs as the entangled channel. Compared with the previous protocols, the required multi-particle measurement is simplified and the classical communication cost is reduced. When the number of senders increases, the advantage is more evident. It means that the proposed schemes are more efficient in practice.

Deterministic joint remote state preparation of arbitrary two-and three-qubit states

We propose a novel deterministic protocol that two senders are capable of remotely preparing arbitrary two-and three-qubit states for a remote receiver using EPR pairs and GHZ state as the quantum channel.Compared with the existing deterministic protocols [An et al.2011 Phys.Lett.A 375 3570 and Chen et al.2012 J.Phys.A：Math.Theor.45 055303],the quantum resources and classical information in our scheme are decreased,and the whole operation process is simplified.

Deterministic joint remote state preparation of arbitrary single- and two-qubit states

In this paper, two novel schemes for deterministic joint remote state preparation（JRSP） of arbitrary single- and twoqubit states are proposed. A set of ingenious four-particle partially entangled states are constructed to serve as the quantum channels. In our schemes, two senders and one receiver are involved. Participants collaborate with each other and perform projective measurements on their own particles under an elaborate measurement basis. Based on their measurement results,the receiver can reestablish the target state by means of appropriate local unitary operations deterministically. Unit success probability can be achieved independent of the channel＇s entanglement degree.

Probabilistic joint remote preparation of a high-dimensional equatorial quantum state

This paper proposes a scheme for probabilistic joint remote preparation of an arbitrary high-dimensional equatorial quantum state by using high-dimensional single-particle orthogonal projective measurement and appropriate unitary operation. As a special case, a scheme of joint remote preparation of a single-qutrit equatorial state is presented in detail. The scheme is also generalized to the multi-party high-dimensional case. It shows that, only if when all the senders collaborate with each other, the receiver can reconstruct the original state with a certain probability.

Deterministic hierarchical joint remote state preparation with six-particle partially entangled state

In this paper, we present a novel scheme for hierarchical joint remote state preparation（HJRSP） in a deterministic manner, where two senders can jointly and remotely prepare an arbitrary single-qubit at three receivers＇ port. A six-particle partially entangled state is pre-shared as the quantum channel. There is a hierarchy among the receivers concerning their powers to reconstruct the target state. Due to various unitary operations and projective measurements, the unit success probability can always be achieved irrespective of the parameters of the pre-shared partially entangled state.

Deterministic Joint Remote Preparation of Arbitrary Four-Particle Genuine Entangled State

A novel deterministic joint remote preparation scheme of arbitrary four-particle genuine entangled state from one sender to either of two receivers is proposed. Two three-particle Green-Horne-Zeilinger （GHZ） states and one four-particle GHZ state are used as the quantum channel. The presented scheme is realized through orthogonal projective mea-surement of the Hadamard transferred basis and recovery operation Ulijk）. Some useful and general measurement bases have been con-structed. The classical communication cost of the presented scheme is also calculated. Our analysis confirms the feasibility and validity of the proposed method, and shows that it has a 100% probability of success in preparation of the target quantum state.

深松旋耕整地混合施肥联合作业机械设计与试验

随着现代化农业发展不断推进,为提高农业作业效率,简化土壤在耕整地阶段的工作过程,满足保护性耕作的绿色环保整地理念,设计了一款深松旋耕整地混合施肥联合作业机械。该机械能够一次性实现碎土、翻土、旋耕、施肥、深松作业,且作业过程中保证深松铲能够打破犁底层,实现施肥要求。田间试验结果表明,该机械符合土壤耕整地的农艺要求,作业过程中没有出现残茬缠绕现象,排肥通畅,施肥效果均衡,碎土率较高,满足了一机多用的设计使用要求,机具的适应能力高,适合多地区推广使用。

一种基于根管预备的绳驱机器人设计与分析

该文设计一种应用于根管预备手术中绳驱机器人构型。电机转动输出连接软轴,软轴与绳索滚筒采用锥度插孔相连,可以实现输出轴方便快捷的拆卸,便于末端机构的高温消毒程序。采用绳索驱动实现驱动元件与执行元件的相对远距离布置,保证末端执行部件的较小尺寸,便于在口腔狭小空间中进行动作。对末端执行机构根管锉软轴进行变形分析,并利用相邻关节间绳索的反向拉缩进行运动的补偿,保证关节间运动的解耦。最后进行样机的制作并验证其基本运动与运动补偿具备可行性。

压力管道工程中有关焊接诸多认知误区和盲区浅析(一)——焊接接头

焊接接头形式和焊缝形式是两个不同概念,而压力管道单面焊焊接接头要达到相当于双面焊同样质量要求是一个综合性的问题,主要涉及焊接方法、母材类别、焊接材料、焊接位置、预热、背面充气保护、热处理、电特性及技术措施等9个因素的影响,同时也与焊工技能有关。熟练焊工按照合格的焊接工艺评定进行施焊、加强焊缝目视检测(VT),尤其是焊接接头坡口加工和焊道VT检测是保障质量的重要要素。

基于乡村单元的多村联合编制村庄规划探索

以单个村庄为对象的传统规划模式难以满足新时期村庄发展要求,将多个村庄划为乡村单元并实现村庄规划联合编制的规划方式成为当下探索的热点。文中基于乡村单元构建,以商水县邓城镇大陈乡村单元规划为例,探讨了国土空间规划体系下多村联合编制村庄规划的要点与策略。

自拟舒筋活血汤联合关节腔内注射玻璃酸钠、强化康复训练治疗膝关节内侧副韧带损伤的效果观察

目的:探讨自拟舒筋活血汤联合关节腔内注射玻璃酸钠、强化康复训练治疗膝关节内侧副韧带损伤的效果。方法:选取2016年6月—2019年6月首都医科大学北京安贞医院收治的72例膝关节内侧副韧带损伤患者作为研究对象,采用随机数字表法分为对照组与观察组,各36例。对照组实施关节腔内注射玻璃酸钠联合强化康复训练,观察组在对照组基础上给予自拟舒筋活血汤治疗。比较两组膝关节疼痛程度与膝关节功能。结果:治疗前,两组视觉模拟评分法(VAS)评分比较,差异无统计学意义(P>0.05);治疗后3个月,两组VAS评分低于治疗前,且观察组低于对照组,差异有统计学意义(P<0.05)。治疗前,两组Lysholm膝关节功能评分比较,差异无统计学意义(P>0.05);治疗后3个月,两组Lysholm膝关节功能评分高于治疗前,且观察组高于对照组,差异有统计学意义(P<0.05)。结论:自拟舒筋活血汤联合关节腔内注射玻璃酸钠、强化康复训练治疗膝关节内侧副韧带损伤的效果显著,可缓解患者疼痛,增强膝关节功能。

选煤厂用带式输送机接头硫化系统建模与特性研究

针对选煤厂用带式输送机胶带接头硫化过程中参数影响特性复杂、加热板温度和电磁特性规律不明确等问题,在分析带式输送机接头硫化工艺原理的基础上,搭建了带式输送机接头电磁感应加热硫化数学模型,并利用COMSOL multiphysics软件对带式输送机接头硫化加热板温度参数进行了仿真研究。结果表明,电磁感应加热后输送带粘合强度提高了3.85%,而电磁加热板与线圈的距离越近,表面温度分布越不均匀,且采用线径较大的线圈可以得到更好的硫化效果,硫化后表面质量更高。

Scheme for Asymmetric and Deterministic Controlled Bidirectional Joint Remote State Preparation

The scheme for asymmetric and deterministic controlled bidirectional joint remote state preparation by using one ten-qubit entangled state as the quantum channel is proposed. In this scheme, Alice and David want to remotely prepare an arbitrary single-qubit state at Bob's site, at the same time, Bob and Eve wish to help Alice remotely prepare an arbitrary two-qubit entangled state. Alice and Bob can simultaneously prepare the desired states with the cooperation of David and Eve under the control of Charlie.

乡村振兴背景下村庄规划联合编制策略研究——以通城县石南镇四村为例

村庄规划的编制是推进乡村振兴的一项重要战略性、基础性工作。文章以通城县石南镇四个村庄规划联合编制实践为例,通过分析村庄核心特点及发展方向,从“多层级、多角度、多方面、多形式”积极探索村庄规划联合编制策略,以期为多村联编提供借鉴经验。

Determinate joint remote preparation of an arbitrary W-class quantum state

A novel determinate joint remote preparation scheme of an arbitrary W-class quantum state is proposed to improve the probability of successful preparation. The presented scheme is realized through orthogonal projective measurement of the Hadamard transferred basis, which converts a global measurement to several local measurements. Thus orthogonal projective measurement of the Hadamard transferred basis enables quantum information to be transmitted from different sources simultaneously, which is a breakthrough for quantum network node processing. Finally, analysis shows the feasibility and validity of the proposed method, with a 100% probability of successful preparation.

整地机械作业对土壤结构的影响

为探究不同整地机械作业对土壤结构的影响规律,根据影响规律分析不同整地机械的优缺点。选定深松机、旋耕机和联合作业机进行田间作业对比,分析作业后的土壤物理参数,深松机对土壤的疏松能力较好,旋耕机的碎土能力较好且能保证一定的土壤平整水平,联合作业机综合能力较强,能提高农业生产效率,间接提高作物产量。研究得到不同整地机械对土壤结构的作业特点,为后续相关研究和整地机械的研制提供参考。

国土空间规划体系下村庄规划与传统村落保护发展规划两规合一联合编制方法的探讨

国土空间规划体系下,村庄规划是法定规划,是国土空间规划体系中的详细规划,是乡村地区进行各项建设的法定依据,属多规合一的实用性综合规划。传统村落是村庄中具有特定属性的一种,传统村落保护发展规划是专项规划,其规划内容重点体现对村庄历史文化价值的有效保护和活化利用。两种规划的编制对指导村庄的保护和发展都具有重要的意义,但其在规划内容和规划成果审批程序上存在一定的局限性、相似性、重复性,无形中在规划编制工作开展时造成了人力、物力、财力的浪费。为此,本文就村庄规划与传统村落保护发展规划如何联合编制的方法进行探讨,以期实现两规合一,提高规划的实用性、可操作性,进而更科学有效指导村庄的保护和发展建设。

B淋巴细胞瘤-2关联永生基因3蛋白、多重肿瘤抑制基因1在宫颈癌癌前病变中表达及联合液基细胞学检查的临床意义

目的研究B淋巴细胞瘤-2关联永生基因3(BAG3)蛋白、多重肿瘤抑制基因1(P16)在宫颈癌癌前病变中表达及联合液基细胞学检查的临床意义。方法选择绵阳市中心医院2015年6月至2017年6月在妇科门诊筛查并确诊的120例宫颈病变病人为研究对象,根据其病变情况分为两组,其中癌前病变组病人69例,宫颈癌组病人51例。对比两组病人的BAG3、P16水平,将不同严重程度宫颈癌癌前病变病人的BAG3、P16水平进行比较,分析联合检测效能。结果宫颈癌组病人的BAG3(2.74±0.37)水平、P16(1.45±0.38)水平显著高于癌前病变组BAG3(1.70±0.51)、P16(0.53±0.16),差异有统计学意义(P<0.05)。不同严重程度宫颈癌癌前病变病人的BAG3和P16水平差异有统计学意义(P<0.05),其中宫颈上皮内瘤变Ⅰ级(CINⅠ)组的BAG3(1.01±0.24)水平低于CINⅡ组BAG3(1.78±0.79)和CINⅢ组的BAG3(2.33±0.88),且CINⅡ组低于CINⅢ组,差异有统计学意义(P<0.05);CINⅠ组的P16(0.21±0.06)水平低于CINⅡ组P16(0.45±0.10)和CINⅢ组的P16(0.72±0.17)水平,且CINⅡ组低于CINⅢ组,差异有统计学意义(P<0.05)。联合诊断对于宫颈癌的诊断特异度显著高于单独检测,差异有统计学意义(P<0.05)。通过ROC曲线分析结果发现联合检测对于宫颈癌癌前病变的诊断ROC曲线下面积显著高于单独检测(P<0.05)。结论随着宫颈癌前病变的进展,P16、BAG3表达增加,BAG3蛋白、P16联合液基细胞学检查对于病人的诊断具有积极的意义。