The Experts below are selected from a list of 37413 Experts worldwide ranked by ideXlab platform
S F Yelin - One of the best experts on this subject based on the ideXlab platform.
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rydberg atom mediated nondestructive readout of collective Rotational States in polar molecule arrays
Physical Review A, 2016Co-Authors: E S Kuznetsova, S F Yelin, Seth T Rittenhouse, H R SadeghpourAbstract:We analyze in detail the possibility to use charge-dipole interaction between a single polar molecule or a 1D molecular array and a single Rydberg atom to read out Rotational populations. The change in the Rydberg electron energy is conditioned on the Rotational state of the polar molecules, allowing for realization of a CNOT quantum gate between the molecules and the atom. Subsequent readout of the atomic fluorescence results in a non-destructive measurement of the Rotational state. We study the interaction between a 1D array of polar molecules and an array or a cloud of atoms in a Rydberg superatom (blockaded) state and calculate the resolved energy shifts of Rb(60s) with KRb and RbYb molecules, with N=1, 3, 5 molecules. We show that collective molecular Rotational States can be read out using the conditioned Rydberg energy shifts.
G. S. Sharov - One of the best experts on this subject based on the ideXlab platform.
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Unstable Rotational States of string models and width of a hadron
Physical Review D, 2009Co-Authors: G. S. SharovAbstract:Rotational States (planar uniform rotations) of various string hadron models are tested for stability with respect to small disturbances. These models include an open or closed string carrying n massive points (quarks), and their Rotational States result in a set of quasilinear Regge trajectories. It is shown that rotations of the linear string baryon model q-q-q and the similar States of the closed string are unstable, because spectra of small disturbances for these States contain complex frequencies, corresponding to exponentially growing modes of disturbances. Rotations of the linear model are unstable for any values of points' masses, but for the closed string we have the threshold effect. This instability is important for describing excited hadrons; in particular, it increases predictions for their width {gamma}. Predicted large values {gamma} for N, {delta} and strange baryons in comparison with experimental data result in unacceptability of the linear string model q-q-q for describing these baryon States.
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Glueball string models, Rotational States, and regge trajectories
Physics of Atomic Nuclei, 2008Co-Authors: G. S. SharovAbstract:A glueball model that describes excited States of glueballs and other exotic hadrons and which has the form of a closed string that features pointlike masses simulating gluons is considered. Rotational States are studied for this model. Their structure proves to be nontrivial. These States are classified, and their frequency spectrum and physical properties, including the energy and angular momentum, are determined with allowance for spin corrections. The corresponding Regge trajectories characterized by a specific set of slopes are used to describe glueball States.
Julio Santos - One of the best experts on this subject based on the ideXlab platform.
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Preparation and control of aligned cyclic Rotational States
Physical Review A, 2013Co-Authors: Juan Ortigoso, Delia Fernández Torre, Julio SantosAbstract:Molecules in selected Rotational States can remain well aligned for extended periods of time in the presence of an appropriate periodic train of nonresonant laser pulses. Here, we show that these States can be prepared by slowly switching the electromagnetic field amplitude during a sequence of laser pulses. For low-temperature ensembles, a high degree of alignment can be achieved by designing pulse trains that take into account the distribution of avoided crossings between quasienergy curves. Additionally, we present calculations that illustrate several effects causing misalignment. A discussion of subtleties concerning systems with unbounded Rotational spectra is also included.
Timothy P. Softley - One of the best experts on this subject based on the ideXlab platform.
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Preparation of ions in selected Rotational States by delayed pulsed field ionization
The Journal of Chemical Physics, 1993Co-Authors: Frédéric Merkt, Stuart R. Mackenzie, Timothy P. SoftleyAbstract:A novel method of preparing ions in selected rovibronic States is presented. It is based on pulsed field ionization of long‐lived high‐n Rydberg States lying just below the different rovibronic energy levels of the ion. The potential of the method is illustrated with the example of hydrogen: A clean population of H2+ ions is prepared in the X 2∑g+ (v+=2, N+=0, 1, 2, 3) States. The method ought to be applicable to the preparation of a wide range of small molecular ions in selected Rotational States and opens new possibilities in the study of state‐to‐state ion–molecule reactions.
Peter Bruggeman - One of the best experts on this subject based on the ideXlab platform.
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Thermalization of Rotational States of NO A 2Σ+(v = 0) in an atmospheric pressure plasma
The Journal of chemical physics, 2013Co-Authors: Van Afh Bram Gessel, Peter BruggemanAbstract:Laser induced fluorescence (LIF) measurements of nitric oxide (NO) are performed in an atmospheric pressure microwave plasma jet, operated with a mixture of He and 3% air. The fluorescence signal of NO A 2Σ+(v = 0) is measured time and fluorescence wavelength resolved. Based on the evolution of the Rotational spectrum at different positions in the plasma, we determined the thermalization time of the Rotational distribution of NO A after pumping a single transition, at temperatures in the range 300–1500 K. Also, a LIF-RET (Rotational energy transfer) model is developed to simulate the RET and to calculate the thermalization time. The RET rate coefficients are calculated using the energy corrected sudden-exponential power scaling law. It was found that it is necessary to take the fine structure of the Rotational States into account. At room temperature the results of the measurement and the simulation are consistent, and the thermalization occurs during the laser pulse (11 ± 1 ns). At elevated temperatures ...
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thermalization of Rotational States of no a 2σ v 0 in an atmospheric pressure plasma
Journal of Chemical Physics, 2013Co-Authors: Van Afh Bram Gessel, Peter BruggemanAbstract:Laser induced fluorescence (LIF) measurements of nitric oxide (NO) are performed in an atmospheric pressure microwave plasma jet, operated with a mixture of He and 3% air. The fluorescence signal of NO A 2Σ+(v = 0) is measured time and fluorescence wavelength resolved. Based on the evolution of the Rotational spectrum at different positions in the plasma, we determined the thermalization time of the Rotational distribution of NO A after pumping a single transition, at temperatures in the range 300–1500 K. Also, a LIF-RET (Rotational energy transfer) model is developed to simulate the RET and to calculate the thermalization time. The RET rate coefficients are calculated using the energy corrected sudden-exponential power scaling law. It was found that it is necessary to take the fine structure of the Rotational States into account. At room temperature the results of the measurement and the simulation are consistent, and the thermalization occurs during the laser pulse (11 ± 1 ns). At elevated temperatures ...
