We study dephasing of electrons induced by a which path detector and thus verify Bohr’s complementarity principle for fermions. We utilize a double path interferometer with two slits, with one slit being replaced by a coherent quantum dot (QD). A short one dimensional channel, in the form of a quantum point contact (QPC), in close proximity to the QD, serves as a which path detector. We find th...

We study the interaction between two adjacent but electrically isolated quantum point contacts (QPCs). At high enough source-drain bias on one QPC, the drive QPC, we detect a finite electric current in the second, unbiased, detector QPC. The current generated at the detector QPC always flows in the opposite direction than the current of the drive QPC. The generated current is maximal, if the de...

The ATLAS experiment performs studies of proton-proton collisions at the Large Hadron Collider (LHC) at CERN. The Inner Detector is a part of the ATLAS apparatus placed nearest the interaction point, designed to measure charged particles momenta and their trajectories, and to reconstruct vertices of decays of physics objects created in collisions. During the LHC technical stop 2013-2015, the In...

We present a fast feature detector that uses the Graphics Processing Unit (GPU) to extract distinctive features from an image, which are suitable for reliable matching between different views of an object or a scene. This detector is a particularly useful tool for the computer vision community because it is: (i) simple to implement; (ii) extremely fast; (iii) operates stand alone requires no po...

Humans and many other species sense visual information with varying spatial resolution across the visual field (foveated vision) and deploy eye movements to actively sample regions of interests in scenes. The advantage of such varying resolution architecture is a reduced computational, hence metabolic cost. But what are the performance costs of such processing strategy relative to a scheme that...

The ATLAS Pixel Detector is the innermost layer of the ATLAS tracking system and will contribute significantly to the ATLAS track and vertex reconstruction. The detector consists of identical sensor-chip-hybrid modules, arranged in three barrels in the centre and three disks on either side for the forward region. The position of the Pixel Detector near the interaction point requires excellent r...

Existing single-stage detectors for locating objects in point clouds often treat object localization and category classification as separate tasks, so the accuracy confidence may not well align. To address this issue, we present a new detector named Confident IoU-Aware Single-Stage Detector (CIA-SSD). First, design lightweight Spatial-Semantic Feature Aggregation module to adaptively fuse high-...