34,264 research outputs found
Simple Scheme for Efficient Linear Optics Quantum Gates
We describe the construction of a conditional quantum control-not (CNOT) gate
from linear optical elements following the program of Knill, Laflamme and
Milburn [Nature {\bf 409}, 46 (2001)]. We show that the basic operation of this
gate can be tested using current technology. We then simplify the scheme
significantly.Comment: Problems with PDF figures correcte
Microscopic origin of the next generation fractional quantum Hall effect
Most of the fractions observed to date belong to the sequences and , and integers, understood as the familiar
{\em integral} quantum Hall effect of composite fermions. These sequences fail
to accommodate, however, many fractions such as and 5/13, discovered
recently in ultra-high mobility samples at very low temperatures. We show that
these "next generation" fractional quantum Hall states are accurately described
as the {\em fractional} quantum Hall effect of composite fermions
Multilevel semantic analysis and problem-solving in the flight domain
A computer based cockpit system which is capable of assisting the pilot in such important tasks as monitoring, diagnosis, and trend analysis was developed. The system is properly organized and is endowed with a knowledge base so that it enhances the pilot's control over the aircraft while simultaneously reducing his workload
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