Zobrazeno 1 - 10
of 41
pro vyhledávání: '"Kobes, Randy"'
Autor:
Alexander, Murray E., Kobes, Randy
The pair approximation is a simple, low-order method to incorporate effects of local spatial structure in epidemiological models. However, since for K state variables in a model there are K(K+1)/2 equations in the pair approximation, generating these
Externí odkaz:
http://arxiv.org/abs/1007.2883
Autor:
Alexander, Murray E., Kobes, Randy
A useful property of a network that can be used to characterize many systems is the degree distribution. However, many complex networks exhibit higher--order degree correlations that must be studied through other means, such as clustering coefficient
Externí odkaz:
http://arxiv.org/abs/1007.0717
We show that by a suitable choice of time-dependent Hamiltonian, the search for a marked item in an unstructured database can be achieved in unit time, using Adiabatic Quantum Computation. This is a considerable improvement over the O(sqrt(N)) time r
Externí odkaz:
http://arxiv.org/abs/quant-ph/0208107
We examine the use of adiabatic quantum algorithms to solve structured, or nested, search problems. We construct suitable time dependent Hamiltonians and derive the computation times for a general class of nested searches involving n qubits. As expec
Externí odkaz:
http://arxiv.org/abs/quant-ph/0208065
Publikováno v:
J. Phys. A: Math. Gen. 36 (2003) 1-7
We present the results of a detailed analysis of a general, unstructured adiabatic quantum search of a data base of $N$ items. In particular we examine the effects on the computation time of adding energy to the system. We find that by increasing the
Externí odkaz:
http://arxiv.org/abs/quant-ph/0204044
Publikováno v:
Phys. Rev. A65 (2002) 062310
We show that by a suitable choice of a time dependent Hamiltonian, Deutsch's algorithm can be implemented by an adiabatic quantum computer. We extend our analysis to the Deutsch-Jozsa problem and estimate the required running time for both global and
Externí odkaz:
http://arxiv.org/abs/quant-ph/0111032
We study in this paper the behavior of a periodically driven nonlinear mechanical system. Bifurcation diagrams are found which locate regions of quasiperiodic, periodic and chaotic behavior within the parameter space of the system. We also conduct a
Externí odkaz:
http://arxiv.org/abs/nlin/0011019
Publikováno v:
Phys.Rev. D60 (1999) 076002
We calculate the Compton and annihilation production of a soft static lepton pair in a quark-gluon plasma in the two-loop approximation. We work in the context of the effective perturbative expansion based on the resummation of hard thermal loops. Do
Externí odkaz:
http://arxiv.org/abs/hep-ph/9903307
Autor:
Kobes, Randy
A review is given of the hard thermal loop resummation methods initiated by Braaten, Pisarski, and others. We describe some successes of these techniques as well as instances where modifications are necessary. Some possible directions where these mod
Externí odkaz:
http://arxiv.org/abs/hep-ph/9511208
Autor:
Elmfors, Per, Kobes, Randy
Publikováno v:
Phys. Rev. D 51, 774 (1995)
Previous calculations of the thermal beta-function in a hot Yang--Mills gas at the one--loop level have exposed problems with the gauge dependence and with the sign, which is opposite to what one would expect for asymptotic freedom. We show that incl
Externí odkaz:
http://arxiv.org/abs/hep-ph/9408254