Positronium (Ps), the bound state formed by a positron and an electron, serves as a valuable probe of void spaces, particularly in materials with irregular porosity such as glasses, low-k dielectrics, and polymers. One ...
Positronium (Ps), the bound state of an electron and a positron, may
be used as a probe of the porous space in bulk materials due to its
long vacuum lifetime and the fact that this lifetime depends strongly
on its ...
Positronium (Ps) is modeled inside a solid Argon lattice using the path integral Monte
Carlo (PIMC) technique. Statistics on site occupancy, Ps structure, and energies are
collected for argon both with and without a ...
Today, we find an increasing interest in Brownian motors - theoretical "thermal
ratchets" that rectify random motion to do work. This interest stems not
only from possible applications to cellular transport mechanisms ...
The extraordinarily short optical dephasing time of organic dye molecules in polymer hosts is known to be under 20 fs between 100 and 200 K. Short dephasing times suggest enormously broadened homogeneous linewidths on the ...
The theoretical lifetime of para-Positronium is calculated using Feynman rules. Relativistic quantum mechanics is discussed. This is accompanied by an introductory level treatment of classical and relativistic propagator ...
Most close binary T Tauri stars are surrounded by circumbinary disks similar to the protoplanetary disks seen around young single stars. In the case of binaries, however, theory predicts that the time-varying gravitational ...
Images from the robotic Hex, southern sky survey, now underway at Cerro Tololo Inter-American Observatory, are analyzed and the survey is quantified in tenns of two past catalogues, one of planetary nebulae and one of HII ...
The theory of quantum computation, a new and promising field, is discussed. The
mathematical background to the field is presented, drawing ideas both from quantum
mechanics and the theory of classical computation. The ...
Using numerical simulation, we measured the performance of several potential
quantum algorithms, based on quantum random walks, to solve Boolean
satisfiability (SAT) problems. We develop the fundamentals of quantum ...
We discuss the nature and role of the measurement problem in quantum mechanics
and present the concept of decoherence as a proposed solution to the
measurement problem. We review important conceptual foundations ...
We have extensively modeled a neon photoionization experiment on the Z machine at
Sandia National Laboratories. Using a suite of modeling codes, we have reproduced
the experimental environment and simulated the physical ...
At the current time, the study of the Interstellar Medium (ISM) can be approached from two different angles. The first is by analyzing observational results from radio astronomy, thereby deducing the structure of the ISM. ...
Arrays of magnetic probes in conjunction with numerical and analytical modeling have been used to study the equilibrium states of magnetized toroidal plasma configurations called spheromaks. A time resolved fit of data to ...
This study examined the phase behavior of four different Langmuir monolayers. The
four different monolayers were 1,2-Dipalimitoyl, sn-Glycero-3-Phophocholine (DPPC),
cetyltrimethylammonium bromide (CTAB), Isocarb-24 ...
The spectroscopic and light scattering techniques for studying the size and shape of aggregates,
which previously have been tested extensively on porphyrins, were applied to two novel systems:
(1) an octahedral complex ...
Young stars, those less than 100 Myr old, provide much information about the formation
of planetary systems. The study of such objects is impossible without reliable indicators
of stellar youth. The most reliable age ...
We have investigated the fluctuations of short-range order in several liquid crystal compounds by measuring the scattering of visible light. We have verified the linear temperature dependence of the leading term in the ...
In plasma physics it is a commonly cited and often valid approximation that magnetic fieldlines are "frozen" to the
plasma fluid. However, in certain situations in solar and astrophysics, as well as in fusion engineering, ...
Resonance light scattering (RLS) permits precise and sensitive
measurement of the size, shape and aggregate number of aggregated
chromophores. However, interpretation of data is complicated by the fact
that resonance ...