CAPE CANAVERAL, Fla. - NASA's final visit to the Hubble Space Telescope has been delayed at least a month, until the fall, because of extra time needed to build the shuttle fuel tanks needed for the flight and a potential
Functional materials and devices have recently attracted great attention of scientists and technologists worldwide. Materials Science & Technology is now being recognized as vital areas for the development and growth in a nation's economy. The science of designing, processing, manufacturing
Main group chemistry has undergone a renaissance in recent years. This important field of chemistry continues to exert a broad impact across many disciplines of science. This meeting brings together a group of experts from around the world to take
This series of conferences on the different fields of chemistry is a scientific event that has been started in Irbid / Jordan in 1997, and it attracts attendees from both industry and academia from all over the world. It has
XIVth Symposium on Intermolecular Interactions and Conformations of Molecules is organised by Chemistry Department of Moscow M. V. Lomonosov State University and Chelyabinsk State University.
The hypothesis of quantum nonequilibrium at the big bang is shown to haveobservable consequences. For a scalar field on expanding space, we show thatrelaxation to quantum equilibrium (in de Broglie-Bohm theory) is suppressed forfield modes whose quantum time evolution satisfies
We investigate the interaction between a single atom and a light field in thestrong focusing regime. Such a configuration is subject to recent experimentalwork not only with atoms but also molecules and other atom-like systems asquantum dots. We derive the
We analyze a controllable generation of maximally entangled mixed states of acircuit containing two-coupled superconducting charge qubits. Each qubit isbased on a Cooper pair box connected to a reservoir electrode through aJosephson junction. Illustrative variational calculations were performed todemonstrate the
We study a model of communication complexity that encompasses manywell-studied problems, including classical and quantum communicationcomplexity, the complexity of simulating distributions arising from bipartitemeasurements of shared quantum states, and XOR games. In this model, Alice getsan input x, Bob gets
Does bound entanglement naturally appear in quantum many-body systems? Weaddress this question by showing the existence of bound-entangled thermalstates for harmonic oscillator systems consisting of an arbitrary number ofparticles. By explicit calculations of the negativity for different partitions,we find a
The suppression of spin-exchange relaxation in dense alkali-metal vapors,discovered in 1973 and governing modern atomic magnetometers, is herereformulated in terms of the quantum Zeno effect. We put forward areinterpretation of known results on spin-dependent atomic collisions occurringin alkali-metal vapors in
We address the presence of non-distillable (bound) entanglement in naturalmany-body systems. In particular, we consider standard harmonic and spin-1/2chains, at thermal equilibrium and characterized by few interaction parameters.The existence of bound entanglement is addressed by calculating explicitly thenegativity of entanglement
We show that the NP-hard quadratic unconstrained binary optimization (QUBO)problem on a graph $G$ can be solved using an adiabatic quantum computer thatimplements an Ising spin-1/2 Hamiltonian, by reduction through minor-embeddingof $G$ in the quantum hardware graph $U$. There are
We clarify the role of the Born rule in the Copenhagen Interpretation ofquantum mechanics by deriving it from Bohr's doctrine of classical concepts,translated into the following mathematical statement: a quantum systemdescribed by a noncommutative C*-algebra of observables is empiricallyaccessible only
