基于调制器中置结构的光纤陀螺设计与分析

提出了一种基于新型相位调制器中置结构的光纤陀螺设计方案,通过新型相位调制器的空间非互易结构,不但从根本上克服了传统光纤陀螺调制频率受限于本征频率的缺点,还可对背向散射噪声和偏振耦合噪声起到抑制作用。理论分析和实验结果表明,该结构可以将背向散射光波引入的相位控制在10^-5量级,而且对偏振耦合噪声的抑制达到了5×10^-8（°）/Hz^1/2;此外,这种中置结构还可以改善陀螺仪的零偏稳定性,其零偏稳定性从0.11878 （°）/h提升至0.09110 （°）/h。本方案克服了当前光纤陀螺仪受本征频率影响的技术难题,为抑制噪声、提高精度提供了一种新的思路。     

Emergence of Superconductivity on the Border of Antiferromagnetic Order in RbMn6Bi5 under High Pressure:A New Family of Mn-Based Superconductors

We report the discovery of superconductivity on the border of antiferromagnetic order in a quasi-one-dimensional material RbMn₆Bi₅ via measurements of resistivity and magnetic susceptibility under high pressures.Its phase diagram of temperature versus pressure resembles those of many magnetism-mediated superconducting systems.With increasing pressure,its antiferromagnetic ordering transition with T_N=83 K at ambient pressure is first enhanced moderately and then s...     

纳米管阵列结构的氧化锌作为一种新的固定相应用于固相微萃取

在纳米科学和纳米技术领域中,一维氧化锌纳米阵列结构由于其高比表面积和高孔隙率在许多方面显示了非常重要的作用.到目前为止,已报道的氧化锌的管状结构合成方法大多采用电沉积和水热的方式.然电沉积得到ZnO纳米管需要有导电基板,该要求限制了衬底的选择.     

TiO2禁带宽度和光吸收系数对其光催化性能的影响

为了研究TiO₂禁带宽度和光吸收系数对其光催化性能的影响,使用Materials Studio的Dmol3和CASTEP模块分别对Ag⁺、Fe³⁺、Pt⁴⁺、La³⁺ 4种金属离子掺杂TiO₂的能带结构和光学性质进行分析。分子模拟表明:金属离子掺杂使TiO₂的禁带宽度变窄、吸收波长红移,相同光照条件下光吸收系数增加,影响了TiO₂的光催化性能。光催化反应实验表明:在254 nm照射条件下,TiO₂的禁带宽度为1.09 eV时光催化性能最好,TiO₂的光吸收系数越大,光催化性能越好。     

Probing a Dissipative Phase Transition with a Trapped Ion through Reservoir Engineering

Dissipation is often considered as a detrimental effect in quantum systems for unitary quantum operations.However, it has been shown that suitable dissipation can be useful resources in both quantum information and quantum simulation. Here, we propose and experimentally simulate a dissipative phase transition(DPT) model using a single trapped ion with an engineered reservoir. We show that the ion’s spatial oscillation mode reaches a steady state after the alternating application of unitary evolu...     

Emergence of High-Temperature Superconducting Phase in Pressurized La3Ni2O7 Crystals

The recent report of pressure-induced structural transition and signature of superconductivity with T_c≈80 K above 14 GPa in La₃Ni₂O₇ crystals has garnered considerable attention.To further elaborate this discovery,we carried out comprehensive resistance measurements on La₃Ni₂O₇ crystals grown in an optical-image floating zone furnace under oxygen pressure(15 bar) using a diamond anvil cell(DAC) and cubic anvil cell(CAC)...