65 research outputs found
Comparison of Field Theory Models of Interest Rates with Market Data
We calibrate and test various variants of field theory models of the interest
rate with data from eurodollars futures. A model based on a simple
psychological factor are seen to provide the best fit to the market. We make a
model independent determination of the volatility function of the forward rates
from market data.Comment: 9 figure
Microcanonical Simulation of Complex Actions: The Wess Zumino Witten Case
We present the main results of our microcanonical simulation of the Wess
Zumino Witten action functional. This action, being highly non-trivial and
capable of exhibiting many different phase transitions, is chosen to be
representative of general complex actions. We verify the applicability of
microcanonical simulation by successfully obtaining two of the many critical
points of the Wess Zumino Witten action. The microcanonical algorithm has the
additional advantage of exhibiting critical behaviour for a small
lattice. We also briefly discuss the subtleties that, in general, arise in
simulating a complex action. Our algorithm for complex actions can be extended
to the study of
D-branes in the Wess Zumino Witten action.Comment: 5 figure
Hedging in Field Theory Models of the Term Structure
We use path integrals to calculate hedge parameters and efficacy of hedging
in a quantum field theory generalization of the Heath, Jarrow and Morton (HJM)
term structure model which parsimoniously describes the evolution of
imperfectly correlated forward rates. We also calculate, within the model
specification, the effectiveness of hedging over finite periods of time. We use
empirical estimates for the parameters of the model to show that a low
dimensional hedge portfolio is quite effective.Comment: 18 figures, Invited Talk, International Econophysics Conference,
Bali, 28-31 August 200
Quantum Mechanics, Path Integrals and Option Pricing: Reducing the Complexity of Finance
Quantum Finance represents the synthesis of the techniques of quantum theory
(quantum mechanics and quantum field theory) to theoretical and applied
finance. After a brief overview of the connection between these fields, we
illustrate some of the methods of lattice simulations of path integrals for the
pricing of options. The ideas are sketched out for simple models, such as the
Black-Scholes model, where analytical and numerical results are compared.
Application of the method to nonlinear systems is also briefly overviewed. More
general models, for exotic or path-dependent options are discussed.Comment: 10 pages, 4 figures, presented by C.Coriano at the Intl. Workshop
"Nonlinear Physics, THeory and Experiment II", Gallipoli, Lecce, June 28-July
6, 200
Maximum temperature for an Ideal Gas of Kac-Moody Fermions
A lagrangian for gauge fields coupled to fermions with the Kac-Moody group as
its gauge group yields, for the pure fermions sector, an ideal gas of Kac-Moody
fermions. The canonical partition function for the case is shown to
have a maximum temperature , where is the
coupling of the super charge operator to the fermions. This result is
similar to the case of strings but unlike strings the result is obtained from a
well-defined lagrangian.Comment: Needs subeqnarray.sty; To be published in Phys. Rev. D, Dec 15, 1995.
Some typographical errors have been corrected in the revised versio
(Supersymmetric) Kac-Moody Gauge Fields in 3+1 Dimensions
Lagrangians for gauge fields and matter fields can be constructed from the
infinite dimensional Kac-Moody algebra and group. A continuum regularization is
used to obtain such generic lagrangians, which contain new nonlinear and
asymmetric interactions not present in gauge theories based on compact Lie
groups. This technique is applied to deriving the Yang-Mills and Chern-Simons
lagrangians for the Kac-Moody case. The extension of this method to D=4,
N=(1/2,0) supersymmetric Kac-Moody gauge fields is also made.Comment: 21 pages, no figures, latex. Minor change
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