The relativistic interaction of charged particle beams with a circularly polarized electromagnetic wave propagating along a uniform guiding magnetic field in the tunneling of a dielectric medium is analyzed. The accel...The relativistic interaction of charged particle beams with a circularly polarized electromagnetic wave propagating along a uniform guiding magnetic field in the tunneling of a dielectric medium is analyzed. The acceleration mechanism and a self-consistent nonlinear theory are presented for the interaction of relativistic charged particle beams with electromagnetic waves. Numerical results show that the beam particle can be efficiently accelerated in the interaction process.展开更多
Quantum or torsion gravity models predict unusual properties of space-time at very short distances. In particular, near the Planck length, around 10<sup>-35</sup> m, empty space may behave as a crystal, si...Quantum or torsion gravity models predict unusual properties of space-time at very short distances. In particular, near the Planck length, around 10<sup>-35</sup> m, empty space may behave as a crystal, singly or doubly refractive. This hypothesis, however, remains uncheckable for any direct measurement since the smallest distance accessible in experiment is about 10<sup>-19</sup> m at the LHC. Here we propose a laboratory test to measure space birefringence or refractivity induced by gravity. A sensitivity 10<sup>-31</sup> m for doubly and 10<sup>-28</sup> m for singly refractive vacuum could be reached with PETRA 6 GeV beam exploring UV laser Compton scattering.展开更多
基金supported by National Natural Science Foundation of China(Nos.51275029,51102007 and 11275007)
文摘The relativistic interaction of charged particle beams with a circularly polarized electromagnetic wave propagating along a uniform guiding magnetic field in the tunneling of a dielectric medium is analyzed. The acceleration mechanism and a self-consistent nonlinear theory are presented for the interaction of relativistic charged particle beams with electromagnetic waves. Numerical results show that the beam particle can be efficiently accelerated in the interaction process.
文摘Quantum or torsion gravity models predict unusual properties of space-time at very short distances. In particular, near the Planck length, around 10<sup>-35</sup> m, empty space may behave as a crystal, singly or doubly refractive. This hypothesis, however, remains uncheckable for any direct measurement since the smallest distance accessible in experiment is about 10<sup>-19</sup> m at the LHC. Here we propose a laboratory test to measure space birefringence or refractivity induced by gravity. A sensitivity 10<sup>-31</sup> m for doubly and 10<sup>-28</sup> m for singly refractive vacuum could be reached with PETRA 6 GeV beam exploring UV laser Compton scattering.
