1,130 research outputs found
Advantage of a quantum player over a classical one in 2x2 quantum games
We study a general symmetric, entangled, quantum game. When one
player has access only to classical strategies while the other can use the full
range of quantum strategies, there are ``miracle'' moves available to the
quantum player that can direct the result of the game towards the quantum
player's preferred result regardless of the classical player's strategy. The
advantage pertaining to the quantum player is dependent on the degree of
entanglement. Below a critical level, dependent on the payoffs in the game, the
miracle move is of no advantage.Comment: Revtex, 10 pages, 2 tables, 4 figures; v2 typo corrected in table 2,
cosmetic changes to tables and figures, comment added to section VI E; v3
title changed to published title; minor mathematical errors in published
version correcte
An introduction to quantum game theory
The application of the methods of quantum mechanics to game theory provides
us with the ability to achieve results not otherwise possible. Both linear
superpositions of actions and entanglement between the players' moves can be
exploited. We provide an introduction to quantum game theory and review the
current status of the subject.Comment: 8 pages, RevTeX; v2 minor changes to the text in light of referees
comments, references added/update
The physical basis for Parrondo's games
Several authors have implied that the original inspiration for Parrondo's
games was a physical system called a ``flashing Brownian ratchet''. The
relationship seems to be intuitively clear but, surprisingly, has not yet been
established with rigor. In this paper, we apply standard finite-difference
methods of numerical analysis to the Fokker-Planck equation. We derive a set of
finite difference equations and show that they have the same form as Parrondo's
games. Parrondo's games, are in effect, a particular way of sampling a
Fokker-Planck equation. Physical Brownian ratchets have been constructed and
have worked. It is hoped that the finite element method presented here will be
useful in the simulation and design of flashing Brownian ratchets.Comment: 10 pages and 2 figure
Terahertz time-domain spectroscopy of edible oils.
Chemical degradation of edible oils has been studied using conventional spectroscopic methods spanning the spectrum from ultraviolet to mid-IR. However, the possibility of morphological changes of oil molecules that can be detected at terahertz frequencies is beginning to receive some attention. Furthermore, the rapidly decreasing cost of this technology and its capability for convenient, in situ measurement of material properties, raises the possibility of monitoring oil during cooking and processing at production facilities, and more generally within the food industry. In this paper, we test the hypothesis that oil undergoes chemical and physical changes when heated above the smoke point, which can be detected in the 0.05-2 THz spectral range, measured using the conventional terahertz time-domain spectroscopy technique. The measurements demonstrate a null result in that there is no significant change in the spectra of terahertz optical parameters after heating above the smoke point for 5 min
Optimizing genetic algorithm strategies for evolving networks
This paper explores the use of genetic algorithms for the design of networks,
where the demands on the network fluctuate in time. For varying network
constraints, we find the best network using the standard genetic algorithm
operators such as inversion, mutation and crossover. We also examine how the
choice of genetic algorithm operators affects the quality of the best network
found. Such networks typically contain redundancy in servers, where several
servers perform the same task and pleiotropy, where servers perform multiple
tasks. We explore this trade-off between pleiotropy versus redundancy on the
cost versus reliability as a measure of the quality of the network.Comment: 9 pages, 5 figure
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