We realize a double-path multimode matter wave interferometer with spinor Bose-Einstein condensate and observe clear spatial interference fringes as well as a periodic change of the visibility in the time domain, which we refer to as the... more
Квантовая оптика и оптомеханика являются одними из наиболее активно развивающихся направлений современной физики, охватывающими разработку гравитационно-волновых детекторов, квантовых сенсоров и других высокочувствительных измерительных... more
We report a first realization of cold atom interferometers with the lightest alkali metal 6 Li atoms and precisely measure the recoil frequency. The atoms are cooled to approach the half of the photon-recoil limit by using a narrow 2S→3P... more
The problem of electron binding states in field of two D0 centres in semiconductive quantum well (QW) in the presence of an external longitudinal magnetic field (along the QW growth axis) is studied within the framework of zero-range... more
Optical control of nanoscale objects has recently developed into a thriving field of research with far-reaching promises for precision measurements, fundamental quantum physics and studies on single-particle thermodynamics. Here, we... more
Alkali-metal-vapor magnetometers, using coherent precession of polarized atomic spins for magnetic field measurement, have become one of the most sensitive magnetic field detectors. Their application areas range from practical uses such... more
By using strong-field approximation, we theoretically investigate the selective enhancement of high-order harmonic generation in a small spectral range driven by a multi-cycle three-color laser field which is composed of an 800 nm laser... more
In view of a three-dimensional picture (3D) of probability to find a particle at a plane of the frequency and the time (PTF) becomes that process of absorption and process of radiation for two level system have different direction on the... more
The clock transition is well known for its minimum magnetic sensitivity at B=0. The hyperfine transition between F=1, m=-1 and F=2, m=1 in 87Rb also shows a point of minimum magnetic sensitivity but it happens at a field of 3.2 Gauss. An... more
We report new precision measurements of the elastic electron-proton scattering cross section for momentum transfer squared (Q 2) up to 15.75 (GeV/c) 2. These data allow for improved extraction of the proton magnetic form factor at high Q... more
The relations among the components of the exit momenta of ultrarelativistic electrons scattered on a strong electromagnetic wave of a low (optical) frequency and linear polarization are established using the exact solutions to the... more
The measurements of FG5 /232 absolute gravimeter in the course of the third European Comparison of Absolute Gravimeters in Walfdange,Luxembourg (ECAG-2011) are reported. The results showed that the standard deviation of the FG5 /232' s... more
The Matter-Wave laser Interferometer Gravitation Antenna, MIGA, will be a hybrid instrument composed of a network of atom interferometers horizontally aligned and interrogated by the resonant field of an optical cavity. This detector will... more
Fluctuations of the earth's gravity field are a major noise source for ground-based experiments investigating general relativity phenomena such as Gravitational Waves (GWs). Mass density variations caused by local seismic or atmospheric... more
We proposed the European Laboratory for Gravitation and Atominterferometric Research (ELGAR), an array of atom gradiometers aimed at studying space-time and gravitation with the primary goal of observing gravitational waves (GWs) in the... more
We provide an introduction into the formulation of non-relativistic quantum mechanics using the Wigner phase-space distribution function and apply this concept to two physical situations at the interface of quantum theory and general... more
We provide an introduction into the formulation of non-relativistic quantum mechanics using the Wigner phase-space distribution function and apply this concept to two physical situations at the interface of quantum theory and general... more
We demonstrate how to realize an optical clock with neutral atoms that is competitive to the currently best single ion optical clocks in accuracy and superior in stability. Using ultracold atoms in a Ca optical frequency standard we show... more
We have measured the beam-normal single-spin asymmetry An in the elastic scattering of 1-3 GeV transversely polarized electrons from 1 H and for the first time from 4 He, 12 C, and 208 Pb. For 1 H, 4 He and 12 C, the measurements are in... more
The exponentially correlated Hylleraas–configuration interaction method (E-Hy-CI) is a generalization of the Hylleraas–configuration interaction method (Hy-CI) in which the single rij of an Hy-CI wave function is generalized to a form of... more
The KArlsruhe TRItium Neutrino experiment KATRIN aims at improving the upper limit of the mass of the electron antineutrino to about 0.2 eV (90% c.l.) by investigating the β-decay of tritium gas molecules T 2 → (3 HeT) + + e − +ν e. The... more
Submitted for the DAMOP11 Meeting of The American Physical Society Progress towards a test of the universality of free fall using a 6 Li/ 7 Li atom interferometer GEENA KIM, University of California at Berkeley, PAUL HAMILTON, DENNIS... more
At Central Michigan University we are developing a high-precision Penning trap mass spectrometer (CHIP-TRAP) that will focus on measurements with long-lived radioactive isotopes. CHIP-TRAP will consist of a pair of hyperbolic... more
Two Fourier-transform ion-cyclotron resonance (FT-ICR) Penning-trap mass spectrometers will be installed in the pumping section of the KArlsruhe TRItium Neutrino (KATRIN) experiment. This experiment aims at determining the electron... more
We present a joint experimental and theoretical study of spin coherence properties of 39 K, 85 Rb, 87 Rb, and 133 Cs atoms trapped in a solid parahydrogen matrix. We use optical pumping to prepare the spin states of the implanted atoms... more
Although they do not lend themselves to analytical resolution, three-body atomic or molecular systems are still simple enough to allow for very precise theoretical predictions of their energy levels, which makes them attractive candidates... more
Berriman provided a simple proof that the modern metre is simply the square root of 1550 square imperial inches..
A close examination of the survey data on the Great Pyramid reveals the metrological technique used to encode some of the intended metrics of the monument, and provides a possible explanation of why the walls in the King's Chamber needed... more
The properties of ultrasonic nonlinear surface wave in the quasilinear region are investigated. In this work the governing equation of particle displacement potential is employed for surface wave in isotropic elastic solid with quadratic... more
Optical fiber communication is the mainstream of communication development at present. However, with the development of optical fiber communication system which trending towards ultra-long length, ultra-large capacity and ultra-high... more
The high-precision Penning-trap mass spectrometer PENTATRAP is currently being revised at the Max-Planck-Institut für Kernphysik in Heidelberg. It uses five Penning traps with the goal to reach a relative uncertainty in mass-ratio... more
In Penning traps electromagnetic forces are used to confine charged particles under well-controlled conditions for virtually unlimited time. Sensitive detection methods have been developed to allow observation of single stored ions.... more
The precise knowledge of the atomic masses of light atomic nuclei, e.g. the proton, deuteron, triton and helion, is of great importance for several fundamental tests in physics. However, the latest high-precision measurements of these... more
An ultra-stable and low-noise 25-channel voltage source providing 0 to À 100 V has been developed. It will supply stable bias potentials for Penning-trap electrodes used in high-precision experiments. The voltage source generates all its... more
Individual charged atomic or molecular particles can be confined by electromagnetic fields for nearly unlimited times under well controlled conditions in a small volume in space. This allows performing spectroscopic experiments with... more
The magnetic moment of the electron, expressed by the g-factor in units of the Bohr magneton, is a key quantity in the theory of quantum electrodynamics (QED). Experiments using single particles confined in Penning traps have provided... more
We report new precision measurements of the elastic electron-proton scattering cross section for momentum transfer squared (Q 2) up to 15.75 (GeV/c) 2. These data allow for improved extraction of the proton magnetic form factor at high Q... more
The deformation of natural systems in response to subsurface water storage and redistribution provides insights into the main water flow path within heterogeneous systems, including the role of faults or fractures. A long baseline... more
The coherence time, and thus sensitivity, of trapped atom interferometers that use nondegenerate gases are limited by the collisions between the atoms. An analytic model that describes the effects of collisions between atoms in an... more
Motion control of multi-channel double crystal monochromator based on parallelism error compensation
Optics and Precision Engineering 第 31 卷 光学 精密工程 trol strategy effectively compensates for crystal parallelism errors and improves parallel alignment accuracy, providing practical application value for the performance enhancement of the... more
The properties of ultrasonic nonlinear surface wave in the quasilinear region are investigated. In this work the governing equation of particle displacement potential is employed for surface wave in isotropic elastic solid with quadratic... more
We observe cavity mediated spin-dependent interactions in an off-resonantly driven multi-level atomic Bose-Einstein condensate that is strongly coupled to an optical cavity. Applying a driving field with adjustable polarization, we... more