7,303 research outputs found
Formulation of detailed consumables management models for the development (preoperational) period of advanced space transportation system. Volume 4: Flight data file contents
The contents of the Flight Data File which constitute the data required by and the data generated by the Mission Planning Processor are presented for the construction of the timeline and the determination of the consumables requirements of a given mission
Formulation of detailed consumables management models for the development (preoperational) period of advanced space transportation system. Volume 5: Flight operations processor requirements
The functional requirements for the Flight Operations Processor are defined. The Flight Operations Processor is that element of the Consumables Management System providing support during the flight operations
Two-Loop Crossover Scaling Functions of the O(N) Model
Using Environmentally Friendly Renormalization, we present an analytic
calculation of the series for the renormalization constants that describe the
equation of state for the model in the whole critical region. The
solution of the beta-function equation, for the running coupling to order two
loops, exhibits crossover between the strong coupling fixed point, associated
with the Goldstone modes, and the Wilson-Fisher fixed point. The Wilson
functions , and , and thus the
effective critical exponents associated with renormalization of the transverse
vertex functions, also exhibit non-trivial crossover between these fixed
points.Comment: 21 pages, 4 figures, version to appears in IJMPL
Extreme intensity pulses in a semiconductor laser with a short external cavity
We present a numerical study of the pulses displayed by a semiconductor laser
with optical feedback in the short cavity regime, such that the external cavity
round trip time is smaller than the laser relaxation oscillation period. For
certain parameters there are occasional pulses, which are high enough to be
considered extreme events. We characterize the bifurcation scenario that gives
rise to such extreme pulses and study the influence of noise. We demonstrate
intermittency when the extreme pulses appear and hysteresis when the attractor
that sustains these pulses is destroyed. We also show that this scenario is
robust under the inclusion of noise
Formulation of consumables management models. Volume 1: Mission planning
Development of an STS (Space Transportation System) interactive computer program MPP (Mission Planning Processor) working model was conducted. A summary of the computer program development and those supporting tasks conducted is presented. Development of the MPP Computer Program is discussed. This development was supported by several parallel tasks. These tasks either directly supported the program development, or provided information for future application and/or modification to the program in relation to the flight planning and flight operations of the STS and advanced spacecraft. The supporting tasks also included development of a Space Station MPP to demonstrate the applicability of the analytical methods developed under this RTOP to more advanced spacecraft than the STS
Guaranteed emergence of genuine entanglement in 3-qubit evolving systems
Multipartite entanglement has been shown to be of particular relevance for a
better understanding and exploitation of the dynamics and flow of entanglement
in multiparty systems. This calls for analysis aimed at identifying the
appropriate processes that guarantee the emergence of multipartite entanglement
in a wide range of scenarios. Here we carry on such analysis considering a
system of two initially entangled qubits, one of which is let to interact with
a third qubit according to an arbitrary unitary evolution. We establish
necessary and sufficient conditions on the corresponding Kraus operators, to
discern whether the evolved state pertains to either one of the classes of
3-qubit pure states that exhibit some kind of entanglement, namely biseparable,
W-, and GHZ- genuine entangled classes. Our results provide a classification of
the Kraus operators according to their capacity of producing 3-qubit
entanglement, and pave the way for extending the analysis to larger systems and
determining the particular interactions that must be implemented in order to
create, enhance and distribute entanglement in a specific manner.Comment: Two new subsections included. Accepted for publication in The
European Physical Journal
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