33 research outputs found
Stone Soup: No Longer Just an Appetiser
This paper announces version 1.0 of Stone Soup: the open-source tracking and state estimation framework. We highlight key elements of the framework and outline example applications and community activities.Stone Soup is engineered with modularity and encapsulation at its heart. This means that its many components can be put together in any number of ways to build, compare, and assure almost any type of multi-target tracking and fusion algorithm. Since its inception in 2017, it has aimed to provide the target tracking and state estimation community with an open, easy-to-deploy framework to develop and assess the performance of different types of trackers. Now, through repeated application in many use cases, implementation of a wide variety of algorithms, multiple beta releases, and contributions from the community, the framework has reached a stable point.In announcing this release, we hope to encourage additional adoption and further contributions to the toolkit. We also acknowledge and express appreciation for the many contributions of time and expertise donated by the tracking and fusion community
A Diamond Nanowire Single Photon Antenna
The development of a robust light source that emits one photon at a time is
an outstanding challenge in quantum science and technology. Here, at the
transition from many to single photon optical communication systems, fully
quantum mechanical effects may be utilized to achieve new capabilities, most
notably perfectly secure communication via quantum cryptography. Practical
implementations place stringent requirements on the device properties,
including stable photon generation, room temperature operation, and efficient
extraction of many photons. Single photon light emitting devices based on
fluorescent dye molecules, quantum dots, and carbon nanotube material systems
have all been explored, but none have simultaneously demonstrated all criteria.
Here, we describe the design, fabrication, and characterization of a bright
source of single photons consisting of an individual Nitrogen-vacancy color
center (NV center) in a diamond nanowire operating in ambient conditions. The
nanowire plays a positive role in increasing the number of single photons
collected from the NV center by an order of magnitude over devices based on
bulk diamond crystals, and allows operation at an order of magnitude lower
power levels. This result enables a new class of nanostructured diamond devices
for room temperature photonic and quantum information processing applications,
and will also impact fields as diverse as biological and chemical sensing,
opto-mechanics, and scanning-probe microscopy.Comment: 16 pages, 4 figures, v2: Includes improved reference list; modified
figure 1 to show a large array of NW and FDTD simulation of field profile;
direct experimental comparsion of several bulk/NW devices in figure
Superconducting single photon detectors integrated with diamond nanophotonic circuits
Photonic quantum technologies promise to repeat the success of integrated
nanophotonic circuits in non-classical applications. Using linear optical
elements, quantum optical computations can be performed with integrated optical
circuits and thus allow for overcoming existing limitations in terms of
scalability. Besides passive optical devices for realizing photonic quantum
gates, active elements such as single photon sources and single photon
detectors are essential ingredients for future optical quantum circuits.
Material systems which allow for the monolithic integration of all components
are particularly attractive, including III-V semiconductors, silicon and also
diamond. Here we demonstrate nanophotonic integrated circuits made from high
quality polycrystalline diamond thin films in combination with on-chip single
photon detectors. Using superconducting nanowires coupled evanescently to
travelling waves we achieve high detection efficiencies up to 66 % combined
with low dark count rates and timing resolution of 190 ps. Our devices are
fully scalable and hold promise for functional diamond photonic quantum
devices.Comment: 28 pages, 5 figure
Acquisition, Measurement and Validation of Aerospace Structural Loads
Peer reviewed: YesNRC publication: Ye
Loading Spectrum Determination for an Aircraft with a Digital Flight Control System - CF-18 Centre Fuselage Example
NRC publication: Ye
CALCULATION OF ACTUATOR LOADS FOR FULL-SCALE AIRCRAFT FATIGUE TESTING - ABSTRACT ONLY
Peer reviewed: YesNRC publication: Ye
Evaluation, Modification and Damage Tolerance of an In-service Aircraft Critical Area - ABSTRACT ONLY
Peer reviewed: YesNRC publication: Ye
FT245 Wing Full-Scale Fatigue Test Design of Stub Wing and Fuselage Loading Systems
NRC publication: Ye
Damage Tolerance Analysis of the North American SNJ-6 Wing Lower Attachment Angle
Peer reviewed: YesNRC publication: Ye