微波消解——FAAS测定康定鼠尾草中8种元素的含量

用微波消解-火焰原子吸收光谱法测定了康定鼠尾草药材中8种元素(钙、铜、铁、锰、锌、镁、铅、镉)的含量。结果表明,康定鼠尾草药材中含有较丰富的镁、钙、铁,该法灵敏度高、快速、准确,所测数据可为康定鼠尾草药材的合理利用提供可靠依据。     

基于智能搜寻者优化的频率分辨光学开关重构算法

频率分辨光学开关(frequency-resolved optical gating,FROG)法是目前测量超短激光脉冲的主要方法之一.针对其常用的主成分广义投影重构(principal component generalized projections,PCGP)算法在处理大矩阵FROG谱图时速度会减慢及存在噪音时准...     

Linear Optical Implementation of Quantum Clock Synchronization Algorithm

We propose optical implementation for the quantum clock synchronization （QCS） algorithm by using only linear optical elements. Our method is based on the single photon representation of qubits. Two kinds of linear optical realization schemes, i.e,, the location-plus-polarization-qubit scheme and the all-location-qubit scheme, are proposed, respectively. Linear optical realizations of three-qubit and four-qubit QCS algorithm are explicitly presented.     

多组分气体吸附平衡理论研究进展*

关于多组分气体吸附平衡理论的研究之所以重要,一是因为其在分离技术中的应用前景,二是因为其尚不成熟。本文对临界温度以下多组分气体吸附平衡理论研究的进展、各种数学模型的特点及适用范围作了评述,并探讨了含超临界值组分的气体吸附平衡理论所面临的问题及其研究方向。     

Controllable cross-Kerr interaction between microwave photons in circuit quantum electrodynamics

We propose a scheme to enable a controllable cross-Kerr interaction between microwave photons in a circuit quantum electrodynamics(QED) system.In this scheme we use two transmission-line resonators(TLRs) and one superconducting quantum interference device(SQUID) type charge qubit,which acts as an artificial atom.It is shown that in the dispersive regime of the circuit-QED system,a controllable cross-Kerr interaction can be obtained by properly preparing the initial state of the qubit,and a large cross-phase shift between two microwave fields in the two TLRs can then be reached.Based on this cross-Kerr interaction,we show how to create a macroscopic entangled state between the two TLRs.     

Tunable ponderomotive squeezing induced by Coulomb interaction in an optomechanical system

We investigate the properties of the ponderomotive squeezing in an optomechanical system coupled to a charged nanomechanical oscillator(NMO) nearby via Coulomb force. We find that the introduction of Coulomb interaction allows the generation of squeezed output light from this system. Our numerical results show that the degree of squeezing can be tuned by the Coulomb coupling strength, the power of laser, and the frequencies of NMOs. Furthermore, the squeezing generated in our approach can be used to measure the Coulomb coupling strength.     

Tunable ponderomotive squeezing in an optomechanical system with two coupled resonators

We investigate properties of the ponderomotive squeezing in an optomechanical system with two coupled resonators,where the tunable two-mode squeezing spectrum can be observed from the output field.It is realized that the squeezing orientation can be controlled by the detuning between the left cavity and pump laser.Especially,both cavity decay and environment temperature play a positive role in generating better pondermotive squeezing light.Strong squeezing spectra with a wide squeezing frequency range can be obtained by appropriate choice of parameters present in our optomechanical system.     

Atomic coherence control on the entanglement of two atoms in two-photon processes

Considering two identical two-level atoms interacting with a single-mode thermal field through two-photon processes, this paper studies the atomic coherence control on the entanglement between two two-level atoms, and finds that the entanglement is greatly enhanced due to the initial atomic coherence. The results show that the entanglement can be manipulated by changing the initial parameters of the system, such as the superposition coefficients and the relative phases of the initial atomic coherent state and the mean photon number of the cavity field.     

含哌嗪的吡唑酰胺衍生物的合成与生物活性

设计合成了16个新型的含哌嗪的吡唑酰胺衍生物,所有化合物结构经1 H NMR、13C NMR、IR和元素分析表征.初步生物活性测试表明,在试验浓度下,部分目标化合物表现出一定的抗菌活性和较好的抗TMV活性.     

Entanglement of two two-level atoms trapped in coupled cavities with a Kerr medium

In this paper, the entanglement dynamics of two two-level atoms trapped in coupled cavities with a Kerr medium is investigated, We find that the phenomena of entanglement sudden death （ESD） and entanglement sudden birth （ESB） appear during the evolution process. The influences of initial atomic states, Kerr medium, and cavity-cavity hopping rate on the atom-atom entanglement are discussed. The results obtained by the numerical method show that the atom- atom entanglement is strengthened and even prevented from ESD with increasing cavity-cavity hopping rate and Kerr nonlinearity.