Quantum State Transfer via Adiabatic Passage

我们采用周期极化KTP晶体为非线性介质，通过光学参量振荡器运转于阈值以下的简并参量振荡过程，产生了单模正交压缩真空态光场，在泵浦功率为123mW，Local光功率为842uW，晶体温度为32．1摄氏度时我们使用平衡零拍探测法测得输出场噪声功率低于散粒噪声基准3．41dB。     

Quantum State Transfer in Trapped-Ion-Cavity Systems

We study the information transfer and entanglement transfer in a system consisting of single trapped ions in cavities by the three-mode cross-Kerr-like interaction among the cavity field （photons）, the centre-of-mass motion （phonons） and the internal state of the trapped ion in the Lamb-Dicke and large detuning regime.     

Spatial Characteristics of Head-Related Transfer Function

The spatial characteristics of head-related transfer functions (HRTFs) are studied by a spatial Fourier analysis.A law of the HRTF spatial sampling in different elevation planes is obtained, and the corresponding spatial interpolating method used to recover the continuous HRTF is proposed. The method is valid, for the average error between the measured and interpolated HRTFs in the horizontal plane is about 0.5%. These results provide guidance for the discrete spatial measurement of HRTFs.     

High Performance Multiple Stream Data Transfer

The ALICE detector at LHC( CERN),will record raw data at a rate of 1.2 Gigabytes per second.Trying to analyse all this data at CRN will not be feasible.As originally proposed by the MONARC project,dta collected at CERN will be transferred to remote centres to use their computing infrastructure,The remote centres will reconstruct and analyse the events.and make available the results.Therefore high-rate data transfer between computing centres(Tiers)will become of paramount importance.This paper will present several tests that have been made between CERN and remote centres in Padova(Italy),Torino(Italy),Catania(Italy),Lyon(France),Ohio(United States),Warsaw(Poland)and Calcutta( India),These tests consisted,in a first stage,of sending raw data from CERN to the remote centres and back,using a ftp method that allows connections of several streams at the same time.Thanks to these multiple streams,it is possilble to increase the rate at which the data is transferred.While several “multiple stream ftp solutions“ already exist,our method is based on a parallel socket implementation which allows,besides files,also objects(or any large message)to be send in parallel.A prototype will be presented able to manage different transfers.This is the first step of a system to be implemented that will be able to take care of the connections with the remote centres to exchange data and monitor the status of the transfer.     

Transfer color to night vision images

Night vision technology enables human beings to operat at night. Low light level imaging and infrared imaging are two key technologies in night vision field. However the images obtained through the night vision imaging systems are monochromatic, this hinders observers from interpreting the scene well. In order to improve targe detection and identification abilities, color night vision technology is being pursued as an effective method fo solving the problem. The main methods of realizing color…     

Doping-Induced Spectral Weight Transfer with d-p Interaction

The doping-induced spectral weight transfer is studied by using the d-p model and considering spatial fluctuations in the high-To cuprates. The results led by the Cu-O interaction are found as follows: (i) the energy levels are grown inside the charge-transfer gap, (ii) the spectral weight is decreased below EF, and Oil) the d holes at Cu-sites in CuO2 planes are delocalized with hole doping. Both metal-insulator transition and electrons of two states are also discussed.     

Multi-Scale Analysis of Energy Transfer in Scalar Turbulence

The energy transfer of homogeneous scalar turbulence is studied numerically by triad interaction in spectral space. The different transfer properties between turbulent kinetic energy and turbulent scalar energy reveal that non-local energy transfer exists as important as the local energy transfer in scalar turbulence. The non-local energy transfer of scalar turbulence results from non-local triad interaction. As a result there will be longer inertiaconvective range in scalar turbulence than the inertial subrange in turbulent kinetic transfer at Reλ = Peλ. The non-local transfer of turbulent scalar energy generates more energy transfer into dissipation range. The discovery of non-local transfer of turbulent scalar energy indicates that this phenomenon should be concerned carefully in numerical scheme and subgrid modelling of direct numerical simulation or large eddy simulation scalar turbulence.     

Soliton Atom Laser with Quantum State Transfer Property

We study the nonlinear effects in the quantum states transfer technique from photons to matter waves in the three-level case, which may provide the formation of a soliton atom laser with nonclassical atoms. The validity of quantum transfer mechanism is confirmed in the presence of the intrinsic nonlinear atomic interactions. The accompanied frequency chirp effect is shown to have no influence on the grey solitons formed by the output atom laser and the possible quantum depletion effect is also briefly discussed.     

Transfer ionization in isocharge sequence ion and Ne collisions

The dependence of the ratio R1 for transfer ionization to single capture for Cq+, Nq+, Oq+, Neq+ ions on Ne target upon the electronic structure of the projectile is studied. For Aq+-Ne collisions the ratio R1 decreases as the atomic number Z of the projectile increases for q=4,5,6,7 sequences which provides strong evidence for the increase of the binding energy of the target valence electron after single electron capture. The increase in binding energy depends both upon the atomic number of the projectile and the target atom.     

Resonance Energy Transfer in New Fullerene–Coumarin Diads

The fluorescence properties of new [60] and [70] fullerene–coumarin diads are studied. These diads were synthesized by covalently linking a coumarin dye to a fullerene (C₆₀ or C₇₀) by a cyclopropanation reaction. The absorption and fluorescence spectra, quantum yields and lifetimes of the diads are reported. The fluorescence quenching of the coumarin moiety by the fullerene was observed in all diads, indicating the occurrence of resonance energy transfer between the coumarin and fullerene moieties.     

Enhanced Three-Photon Absorption by Symmetric Twisted Intramolecular Charge Transfer

We report on a novel organic chromophore with symmetric twisted intramolecular charge transfer (TICT) state on excitation. The properties of nonlinear transmission induced by three-photon absorption (3 PA) are demonstrated pumped with nanosecond laser pulse. Large 3PA cross sections as high as the order of 10^-74 cm^6s^2 have been obtained for nanosecond and picosecond laser pulses at 1064 nm from intensity-dependent transmission measurements. Similar two emissive behaviours from one-photon and three-photon excited fluorescence spectra indicate that the linear and nonlinear fluorescences share the same TICT relaxation process from the excited states. The intensity dependence of upconversion fluorescence on the incident intensity obeys the cubic law that characterizes the three-photon absorption.     

Transfer Ionization of Isocharge Sequence Ion and Ar Collisions

The study of multi-electron process has been a very active area of atomic physics research. The simultaneous electron emission and electron transfer is one of the most interesting two-electron processes in the study Of ionatom collisions, In last decade much experimental and theoretical attention has been devoted to the process, named transfer ionization (TI). This process is normally considered as the successive process of the single electron capture and the ionization of the second or more target electrons. The studies of transfer ionization are motivated by the understanding of the role of the electron correlation in ion-atom collisions which is of great interest in basic atomic physics and may provide important information for the applications both in astrophysics and fusion plasmas researches. Different authors have investigated the transfer ionization process by measuring the angular distribution of the emitted electrons. Up to now, the systematic study of the transfer ionization and the dependences of these processes on the collision parameters for the low energy ion-atom collisions are still rarely reported in the literatures.     

A Theoretical Scheme for Entanglement Transfer under Intensity-Dependent Couplings

We consider a theoretical scheme for entanglement transfer between a two-mode squeezed vacuum field and two initially separable atoms through intensity-dependent couplings. We find that the entanglement transfer between the field and the atoms has an exact period for any given squeezing. We also find that the maximum achievable entanglement of the atomic subsystem is a simple increasing function of r.For sufficiently large squeezing parameter r, it is possible for the atoms to be entangled into a Bell state at half the periodic time points.     

Transfer Ionization Cross-sections in Ar Ions on Neon Collisions

We measured the charge exchange cross-sections in collisions of Ar^q (q=8, 9, 11, 12) on Ne atoms at low impact energies from 80 keV to 240 keV, and obtained a set of cross-section data. In order to understand the charge exchange processes, we combined the Molecular Classical over-Barrier Model (MCBM) developed by Niehaus[1] with auto-ionization and electron evaporation of multiply excited states. This was described in detail in Refs.[2, 3]. The de-excitation was considered only via Auger process (auto-ionization) in Refs.[4]. In our treatment, the multiply excited states of the projectile undergo Auger decay while the electrons in the multiply excited states of target ions undergo statistical evaporation[5‘6]. For projectile auto-ionization, some criterions based on the Auger electron spectra are applied in order to proceed the sequential decay. To calculate the evaporation probability, one has to get the excitation energy of the system. In our case, the excitation energy was obtained according to the states occupied by the captured electrons based on the MCBM. The values are different from the ones in, but more realistic. If one traces each molecularized electrons to its final states in the processes, one can reproduce each possible reaction channel. The processes discussed can be summarized in the following equation     

Rotational Inhibition and Magnetization Transfer in α-Crystallin Solutions

The magnetic field dependence (dispersion profile) of 1/T₁ of solvent water protons of solutions of the mammalian eye lens protein α-crystallin has a reversible nonlinear dependence on concentration which, as protein concentration increases above ∼20 wt.%, changes rapidly from a profile characteristic of mobile protein solute to a profile characteristic of rotationally immobilized protein (e.g., chemically cross-linked). From quantitative comparisons of new measurements of K at 200.1 MHz, the rate of water-to-protein interfacial magnetization transfer, with earlier data for α-crystallin and bovine serum albumin (BSA), we conclude, for α-crystallin, that: (i) Brownian rotation is slowed by intermolecular interactions at unexpectedly low concentrations; (ii) K is mediated by the newly reported, long-lived, protein hydration sites with the same surface density as BSA; and (iii) ¹⁴N peaks seen in solvent 1/T₁ arise from interfacial magnetization transfer plus diffusion to protein NH magnetization sinks.     

A Transfer Matrix-Based Analysis of Vertical-Cavity Semiconductor Optical Amplifiers

Based on the transfer matrix method, we present a new one-dimensional steady-state model of vertical-cavity semiconductor optical amplifiers （VCSOAs）, in which the longitudinal carrier concentration distribution in the active region and the discontinuity of the refractive index inside the cavity is taken into consideration. The model is theoretically proven to be a reliable one for describing the standing wave effect in a periodic gain structure. By using this model, some optical amplification characteristics of VCSOAs are investigated.     

Data Transfer Using Buffered I／O API with HPSS

The new KEK Central computer system employed HPSS for data management To gain high performance access to HPSS easily,we built a wrapper of the client APL.     

Heat Transfer in Gas–Liquid Flows Through Wire-Mesh Packing

This article presents the research on the air–water system flowing in a pipe section with electrical heating with a wire-mesh bed inside it. The heat flux was determined and so was the convective heat transfer coefficient for the two-phase flow through a pipe length that had been completely or partially filled with the wire-mesh packing. The packing level was found to strongly affect the heat transfer potential. Also, the dominant role was identified for a liquid in the heat exchange process under two-phase gas–liquid flow through the wire-mesh packing.     

Statistical Mechanics of Horizontal Gene Transfer in?Evolutionary Ecology

The biological world, especially its majority microbial component, is strongly interacting and may be dominated by collective effects. In this review, we provide a brief introduction for statistical physicists of the way in which living cells communicate genetically through transferred genes, as well as the ways in which they can reorganize their genomes in response to environmental pressure. We discuss how genome evolution can be thought of as related to the physical phenomenon of annealing, and describe the sense in which genomes can be said to exhibit an analogue of information entropy. As a direct application of these ideas, we analyze the variation with ocean depth of transposons in marine microbial genomes, predicting trends that are consistent with recent observations using metagenomic surveys.