29 research outputs found
Electrical characterization of hot-wire assisted atomic layer deposited Tungsten films
In this work, we applied conventional Van der Pauw and circular transmission line method (CTLM) test structures to determine the sheet and contact resistance of ultra-thin (1-10 nm) tungsten films grown by Hot Wire assisted Atomic Layer Deposition, as well as their temperature coefficient of resistance (TCR). We finally explored the field effect (FE) in these layers
Probing Quantum Aspects of Gravity
We emphasize that a specific aspect of quantum gravity is the absence of a
super-selection rule that prevents a linear superposition of different
gravitational charges. As an immediate consequence, we obtain a tiny, but
observable, violation of the equivalence principle, provided, inertial and
gravitational masses are not assumed to be operationally identical objects. In
this framework, the cosmic gravitational environment affects local experiments.
A range of terrestrial experiments, from neutron interferometry to neutrino
oscillations, can serve as possible probes to study the emergent quantum
aspects of gravity.Comment: Phys. Lett. B (in press). S. Sarkar's name was inadvertently missed
from the list of authors for "Nature 393 (1998) 763-765." This has been now
correcte
Illusory Decoherence
If a quantum experiment includes random processes, then the results of
repeated measurements can appear consistent with irreversible decoherence even
if the system's evolution prior to measurement was reversible and unitary. Two
thought experiments are constructed as examples.Comment: 10 pages, 3 figure
Strongly coupled chameleon fields: possible test with a neutron Lloyd's mirror interferometer
The consideration is presented of possible neutron Lloyd's mirror
interferometer experiment to search for strongly coupled chameleon fields. The
chameleon scalar fields were proposed to explain the early and late time
acceleration of expansion of the Universe. They may produce short-range
interaction between particles and matter. This interaction causes phase shift
of neutron waves in the interferometer. Estimates of sensitivity are performed.Comment: 11 p, 3 fig; the title is changed, extended feasibility
consideration: expected intensity and systematic effect
Gravitational Atom in Compactified Extra Dimensions
We consider quantum mechanical effects of the modified Newtonian potential in
the presence of extra compactified dimensions. We develop a method to solve the
resulting Schroedinger equation and determine the energy shifts caused by the
Yukawa-type corrections of the potential. We comment on the possibility of
detecting the modified gravitational bound state Energy spectrum by present day
and future experiments.Comment: 12 pages, 2 figure