Nonclassicality of states and measurements by breaking classical bounds on statistics

Original article can be found at: http://pra.aps.org/ Copyright American Physical Society. DOI: 10.1103/PhysRevA.79.042105We derive exceedingly simple practical procedures revealing the quantum nature of states and measurements by the violation of classical upper bounds on the statistics of arbitrary measurements. Data analysis is minimum, and definite conclusions are obtained without evaluation of moments or any other more sophisticated procedures. These nonclassical tests are independent of other typical quantum signatures such as sub-Poissonian statistics, quadrature squeezing, or oscillatory statistics. This approach can be equally well applied to very diverse situations such as single- and two-mode fields, observables with continuous and discrete spectra, finite- and infinite-dimensional systems, and ideal and noisy measurements.Peer reviewe

Effect of Eccentricity on the Static and Dynamic Performance of a Turbulent Hybrid Bearing

The effect of journal eccentricity on the static and dynamic performance of a water lubricated, 5-recess hybrid bearing is presented in detail. The hydrostatic bearing has been designed to operate at a high speed and with a large level of external pressurization. The operating conditions determine the flow in the bearing to be highly turbulent and strongly dominated by fluid inertia effects. The analysis covers the spectrum of journal center displacements directed towards the middle of a recess and towards the mid-land portion between two consecutive recesses. Predicted dynamic force coefficients are uniform for small to moderate eccentricities. For large journal center displacements, fluid cavitation and recess position determine large changes in the bearing dynamic performance. The effect of fluid inertia force coefficients on the threshold speed of instability and whirl ratio of a single mass flexible rotor is discussed

Dynamical Sieve of Eratosthenes

In this document, prime numbers are related as functions over time, mimicking the Sieve of Eratosthenes. For this purpose, the mathematical representation is a uni-dimentional time line depicting the number line for positive natural numbers N, where each number n represents a time t. In the same way as the Eratosthenes' sieve, which iteratively mark as composite the multiples of each prime, starting at each prime. This dynamical prime number function P(s) zero-cross all composite numbers departing from primes, following a linear progression over time.Comment: 9 page

Studies on Maltese Consanguinity

The possible genetic consequences of consanguinity have been known from ancient times, though different societies have held varying views. Some have encouraged consanguinity as desirable and the classic examples are the sister brother marriages of the Egyptian Pharaohs and also of the ancient Irish and Inca Royal families. Mother-son, father-daughter marriages are only said to occur occasionally among the primitive tribes such as the Minahassa of Celebes. In certain countries, consanguinous marriages are very common. The Japanese population of nearly 100 million has a remarkable degree of inbreeding, reaching a consanguinity rate of approximately 20% in many districts, while in Central and Southern India many populated areas are claimed to have a 60% consanguinity rate. Inbreeding is typically common in isolate population, and small island communities or `closed' populations are most frequently associated with this phenomenon.peer-reviewe