501 research outputs found
How to investigate the decision making behavior of investors in financial markets by means of software agents
In our work we focus our attention to the following research question: can a software agent simulation reproduce
the behaviour of a significant financial market time serie by concentrating on many simple interactions among
investors-agents
Software agents as a versatile simulation tool to model complex systems
Software agents as a versatile simulation tool to model complex system
How to Identify Investor's types in real financial markets by means of agent based simulation
The paper proposes a computational adaptation of the principles underlying
principal component analysis with agent based simulation in order to produce a
novel modeling methodology for financial time series and financial markets.
Goal of the proposed methodology is to find a reduced set of investor s models
(agents) which is able to approximate or explain a target financial time
series. As computational testbed for the study, we choose the learning system L
FABS which combines simulated annealing with agent based simulation for
approximating financial time series. We will also comment on how L FABS s
architecture could exploit parallel computation to scale when dealing with
massive agent simulations. Two experimental case studies showing the efficacy
of the proposed methodology are reported.Comment: 18 pages, in pres
Quantum Bayesian methods and subsequent measurements
After a derivation of the quantum Bayes theorem, and a discussion of the
reconstruction of the unknown state of identical spin systems by repeated
measurements, the main part of this paper treats the problem of determining the
unknown phase difference of two coherent sources by photon measurements. While
the approach of this paper is based on computing correlations of actual
measurements (photon detections), it is possible to derive indirectly a
probability distribution for the phase difference. In this approach, the
quantum phase is not an observable, but a parameter of an unknown quantum
state. Photon measurements determine a probability distribution for the phase
difference. The approach used in this paper takes into account both photon
statistics and the finite efficiency of the detectors.Comment: Expanded and corrected version. 13 pages, 1 figur
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