319 research outputs found
Option Pricing beyond Black-Scholes Model: Quantum Mechanics Approach
Based on the analog between the stochastic dynamics and quantum harmonic oscillator, we propose a market force driving model to generalize the Black-Scholes model in finance market. We give new schemes of option pricing, in which we can take various unexpected market behaviors into account to modify the option pricing. As examples, we present several market forces to analyze their effects on the option pricing. These results provide us two practical applications. One is to be used as a new scheme of option pricing when we can predict some hidden market forces or behaviors emerging. The other implies the existence of some risk premium when some unexpected forces emerge
Finding unprecedentedly low-thermal-conductivity half-Heusler semiconductors via high-throughput materials modeling
The lattice thermal conductivity ({\kappa}{\omega}) is a key property for
many potential applications of compounds. Discovery of materials with very low
or high {\kappa}{\omega} remains an experimental challenge due to high costs
and time-consuming synthesis procedures. High-throughput computational
pre-screening is a valuable approach for significantly reducing the set of
candidate compounds. In this article, we introduce efficient methods for
reliably estimating the bulk {\kappa}{\omega} for a large number of compounds.
The algorithms are based on a combination of machine-learning algorithms,
physical insights, and automatic ab-initio calculations. We scanned
approximately 79,000 half-Heusler entries in the AFLOWLIB.org database. Among
the 450 mechanically stable ordered semiconductors identified, we find that
{\kappa}{\omega} spans more than two orders of magnitude- a much larger range
than that previously thought. {\kappa}{\omega} is lowest for compounds whose
elements in equivalent positions have large atomic radii. We then perform a
thorough screening of thermodynamical stability that allows to reduce the list
to 77 systems. We can then provide a quantitative estimate of {\kappa}{\omega}
for this selected range of systems. Three semiconductors having
{\kappa}{\omega} < 5 W /(m K) are proposed for further experimental study.Comment: 9 pages, 4 figure
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