Results 1 - 10 of 2020
Results 1 - 10 of 2020. Search took: 0.024 seconds
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[en] The dimer–atom–atom recombination process in the system of four identical bosons with resonant interactions is studied. The description uses the exact Alt, Grassberger and Sandhas equations for the four-particle transition operators that are solved in the momentum–space framework. The dimer–dimer and atom–trimer channel contributions to the ultracold dimer–atom–atom recombination rate are calculated. The dimer–atom–atom recombination rate greatly exceeds the three-atom recombination rate (author)
[en] The measurements of and in decays were incorrectly reported in the paper https://doi.org/10.1007/JHEP11(2017)156, due to a transposition of the systematic uncertainties. This error was present in the reporting of the individual systematic uncertainties, the correlation matrix, and in the calculation of . In this erratum, all tables and final values that need correction are reported, with identical numbering and captions to those in the original publication. As the affected systematic uncertainties are substantially smaller than the statistical uncertainties there is no change to the interpretation of these results and the conclusions. The corrected observables are where the first uncertainty is statistical and the second is systematic.
[en] Two schemes for the remote preparation of a four-qubit W state using a six-qubit maximally entangled state as the quantum channel are presented. The success probability of the preparation is calculated for the two cases. It is worth noting that the probability of success is determined by the sender Alice's measurement. If Alice's measurement is appropriate, the remote preparation can be successfully realized with maximum probability.
[en] By generalizing the restricted three-body problem, we introduce the restricted four-body problem. We present a numerical study of this problem which includes a study of equilibrium points, regions of possible motion and periodic orbits. Our main motivation for introducing this problem is that it can be used as an intermediate step for a systematic exploration of the general four-body problem. In an analogous way, one may introduce the restricted N-body problem. (orig.)
[en] An example is presented where the set of equations for the scattering amplitudes of four non-relativistic particles obtained by rearranging Lippmann-Schwinger equations does not have a unique solution or is inconsistent. Since the four-body problem treated is also the degenerate case of scattering of five or more particles, it may be assumed that the absence of unique solution is indicated of the set of integral equations generalized for the problems of four and more bodies