117 research outputs found
Hanbury Brown-Twiss Effect with Wave Packets
The Hanbury Brown-Twiss (HBT) effect, at the quantum level, is essentially an
interference of one particle with another, as opposed to interference of a
particle with itself. Conventional treatments of identical particles encounter
difficulties while dealing with entanglement. A recently introduced label-free
approach to indistinguishable particles is described, and is used to analyze
the HBT effect. Quantum wave-packets have been used to provide a better
understanding of the quantum interpretation of the HBT effect. The effect is
demonstrated for two independent particles governed by Bose-Einstein or
Fermi-Dirac statistics. The HBT effect is also analyzed for pairs of entangled
particles. Surprisingly, entanglement has almost no effect on the interference
seen in the HBT effect. In the light of the results, an old quantum optics
experiment is reanalyzed, and it is argued that the interference seen in that
experiment is not a consequence of non-local correlations between the photons,
as is commonly believed.Comment: Published versio
Evaluation of the Design Metric to Reduce the Number of Defects in Software Development
Software design is one of the most important and key activities in the system
development life cycle (SDLC) phase that ensures the quality of software.
Different key areas of design are very vital to be taken into consideration
while designing software. Software design describes how the software system is
decomposed and managed in smaller components. Object-oriented (OO) paradigm has
facilitated software industry with more reliable and manageable software and
its design. The quality of the software design can be measured through
different metrics such as Chidamber and Kemerer (CK) design metrics, Mood
Metrics & Lorenz and Kidd metrics. CK metrics is one of the oldest and most
reliable metrics among all metrics available to software industry to evaluate
OO design. This paper presents an evaluation of CK metrics to propose an
improved CK design metrics values to reduce the defects during software design
phase in software. This paper will also describe that whether a significant
effect of any CK design metrics exists on total number of defects per module or
not. This is achieved by conducting survey in two software development
companies.Comment: 9 Page
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