3 research outputs found
Quantum optimization of coherent chaotic systems: A case for buses of Kathmandu
In this paper, we propose a novel quantum computing approach to solve the
real-world problem of optimizing transportation in bustling Kathmandu city. The
transportation system in Kathmandu is chaotic, with no central authority
controlling the transportation. We leverage this chaotic feature in our quantum
optimization procedure. The quantum chaos theory's Wigner-Dyson distribution
surfaced as the most effective bus spacing distribution for a bus driver to
maximize their profit. We investigate the statistical properties of the buses
with real-time GPS bus location data and optimize bus spacing and interval
distribution around the 27 km circular ring road in Kathmandu. Using tools like
quantum simulation, eigenvalue distributions, and output wave function
analysis, we show that such optimal bus spacing distribution could be achieved
Upconversion of infrared light by graphitic micro-particles due to photo-induced structural modification
Recent reports of upconversion and white light emission from graphitic
particles warrant an explanation of the physics behind the process. We offer a
model, wherein the upconversion is facilitated by photo-induced electronic
structure modification allowing for multi-photon processes. As per the
prediction of the model, we experimentally show that graphite upconverts
infrared light centered around 1.31~m to broadband white light centered
around 0.85 m. Our results suggest that upconversion from shortwave
infrared (3~m) to visible region may be possible. Our experiments
show that the population dynamics of the electronic states involved in this
upconversion process occur in the timescale of milliseconds
Upconversion of infrared light by graphitic micro-particles due to photo-induced structural modification
Recent reports of upconversion and white light emission from graphitic particles warrant an explanation of the physics behind the process. We offer a model, wherein the upconversion is facilitated by
photo-induced electronic structure modification allowing for multi-photon processes. As per the prediction of the model, we experimentally show that graphite upconverts infrared light centered around 1.31 μm to broadband
white light centered around 0.85 μm. Our results suggest that upconversion from shortwave infrared (∼3 μm) to visible region may be possible. Our experiments show that the population dynamics of the electronic states involved in this upconversion process occur in the timescale of milliseconds