6,060 research outputs found
A decision theoretic analysis of the unit root hypothesis using mixtures of elliptical models
Time Series;Unit Root
A Formal Theory of Key Conjuring
Key conjuring is the process by which an attacker obtains an unknown, encrypted key by repeatedly calling a cryptographic API function with random values in place of keys. We propose a formalism for detecting computationally feasible key conjuring operations, incorporated into a Dolev-Yao style model of the security API. We show that security in the presence of key conjuring operations is decidable for a particular class of APIs, which includes the key management API of IBM’s Common Cryptographic Architecture (CCA)
The components of output growth: A cross-country analysis
Economic Growth;Output;Productivity
Bayesian efficiency analysis with a flexible form: The aim cost function
Sampling;Bayesian Statistics
Estimating end-use demand: A Bayesian approach
Eliminating negative end-use or appliance consumption estimates and incorporating direct metering information into the process of generating these estimates; these are two important aspects, of conditional demand analysis (CDA) that will be the focus of this raper. In both cases a Bayesian approach seems a natural way of proceeding. What needs to be investigated is whether it is also a viable and effective approach. In addition, such a framework naturally lends itself to prediction. Our application involves the estimation of electrical appliance consumptions for a sample of Australian households. This application is designed to illustrate the viability of a full Bayesian analysis of the problem
Proposal for an Integrated Raman-free Correlated Photon Source
We propose a dual-pump third-order nonlinear scheme for producing pairs of
correlated photons that is less susceptible to Raman noise than typical
spontaneous four wave mixing methods (SFWM). Beginning with the full multimode
Hamiltonian we derive a general expression for the joint spectral amplitude,
from which the probability of producing a pair of photons can be calculated. As
an example, we demonstrate that a probability of 0.028 pairs per pulse can be
achieved in an appropriately designed fused silica microfiber. As compared with
single pump SFWM in standard fiber, we calculate that our process shows
significant suppression of the spontaneous Raman scattering and an improvement
in the signal to noise ratio.Comment: 7 pages, 3 figures (two containing 2 subfigures
Adiabatic optical entanglement between electron spins in separate quantum dots
We present an adiabatic approach to the design of entangling quantum
operations with two electron spins localized in separate InAs/GaAs quantum dots
via the Coulomb interaction between optically-excited localized states.
Slowly-varying optical pulses minimize the pulse noise and the relaxation of
the excited states. An analytic "dressed state" solution gives a clear physical
picture of the entangling process, and a numerical solution is used to
investigate the error dynamics. For two vertically-stacked quantum dots we show
that, for a broad range of dot parameters, a two-spin state with concurrence
can be obtained by four optical pulses with durations
ns.Comment: 7 pages, 5 figure
- …