24,642 research outputs found
Gravitationally Coupled Electroweak Monopole
We present a family of gravitationally coupled electroweak monopole solutions
in Einstein-Weinberg-Salam theory. Our result confirms the existence of
globally regular gravitating electroweak monopole which changes to the
magnetically charged black hole as the Higgs vacuum value approaches to the
Planck scale. Moreover, our solutions could provide a more accurate description
of the monopole stars and magnetically charged black holes
Finite Energy Electroweak Dyon
The recent MoEDAL experiment at LHC to detect the electroweak monopole makes
the theoretical prediction of the monopole mass an urgent issue. We discuss
different ways to estimate the mass of the electroweak monopole. We first
present a scaling argument which indicates that the mass of the electroweak
monopole to be around 4 TeV. To justify this we construct finite energy
analytic dyon solutions which could be viewed as the regularized Cho-Maison
dyon, modifying the coupling strengths of the electromagnetic interaction of
-boson in the standard model. Our result demonstrates that a genuine
electroweak monopole whose mass scale is much smaller than the grand
unification scale can exist, which can actually be detected at the present LHC.Comment: arXiv admin note: substantial text overlap with arXiv:hep-th/0210299,
arXiv:hep-th/970703
Single Cooper-pair pumping in the adiabatic limit and beyond
We demonstrate controlled pumping of Cooper pairs down to the level of a
single pair per cycle, using an rf-driven Cooper-pair sluice. We also
investigate the breakdown of the adiabatic dynamics in two different ways. By
transferring many Cooper pairs at a time, we observe a crossover between pure
Cooper-pair and mixed Cooper-pair-quasiparticle transport. By tuning the
Josephson coupling that governs Cooper-pair tunneling, we characterize
Landau-Zener transitions in our device. Our data are quantitatively accounted
for by a simple model including decoherence effects.Comment: 5 pages, 5 figure
Mapless Online Detection of Dynamic Objects in 3D Lidar
This paper presents a model-free, setting-independent method for online
detection of dynamic objects in 3D lidar data. We explicitly compensate for the
moving-while-scanning operation (motion distortion) of present-day 3D spinning
lidar sensors. Our detection method uses a motion-compensated freespace
querying algorithm and classifies between dynamic (currently moving) and static
(currently stationary) labels at the point level. For a quantitative analysis,
we establish a benchmark with motion-distorted lidar data using CARLA, an
open-source simulator for autonomous driving research. We also provide a
qualitative analysis with real data using a Velodyne HDL-64E in driving
scenarios. Compared to existing 3D lidar methods that are model-free, our
method is unique because of its setting independence and compensation for
pointcloud motion distortion.Comment: 7 pages, 8 figure
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