27,791 research outputs found
dimensional Dirac equation with non Hermitian interaction
We study dimensional Dirac equation with non Hermitian interactions,
but real energies. In particular, we analyze the pseudoscalar and scalar
interactions in detail, illustrating our observations with some examples. We
also show that the relevant hidden symmetry of the Dirac equation with such an
interaction is pseudo supersymmetry.Comment: 9 page
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Search for Kirat Identity Trends of De-Sanskritization Among the Nepamul Sikkimese
Occasional Papers in Sociology and Anthropology - Peace and Democracy in South Asia, Volume 2, Numbers 1&2, 200
Scattering states of a particle, with position-dependent mass, in a symmetric heterojunction
The study of a particle with position-dependent effective mass (pdem), within
a double heterojunction is extended into the complex domain --- when the region
within the heterojunctions is described by a non Hermitian
symmetric potential. After obtaining the exact analytical solutions, the
reflection and transmission coefficients are calculated, and plotted as a
function of the energy. It is observed that at least two of the characteristic
features of non Hermitian symmetric systems --- viz., left / right
asymmetry and anomalous behaviour at spectral singularity, are preserved even
in the presence of pdem. The possibility of charge conservation is also
discussed.Comment: 12 pages, including 6 figures; Journal of Physics A : Math. Theor.
(2012
The Leggett-Garg inequality and Page-Wootters mechanism
Violation of the Leggett-Garg inequality (LGI) implies quantum phenomena. In
this light we establish that the Moreva \textit{et al.} \cite{moreva}
experiment demonstrating the Page-Wootter's mechanism \cite{wootters} falls in
the quantum domain. An observer outside a 2-photons world does not detect any
change in the photons state,i.e. there is no time parameter for the outside
observer. But an observer attached to one of the photons sees the other photon
evolving and this means there is an "internal" time. The LGI is violated for
the clock photon whose state evolves with the internal time as measured by the
system photon. Conditional probabilities in this 2-photons system are computed
for both sharp and unsharp measurements. The conditional probability increases
for entangled states as obtained by Page and Wootters for both ideal and also
unsharp measurements. We discuss how the conditional probabilities can be used
to distinguish between massless and massive gravitons. This is important in the
context of gravitational waves.Comment: 5 pages, Late
On the Laser Stimulation of Low-Energy Nuclear Reactions in Deuterated Palladium
Models to account for the observed experimental results for low-energy
nuclear reactions in palladium-deuteride systems are presented along with
calculated results. The crucial idea is a mechanism of improved probability for
the needed penetration of the Coulomb barrier for a D-D reaction. This
facilitation occurs, in general, with the formation of D^- ions at special
frequency modes (e.g. via phonons) and, specifically for the laser-stimulated
case, with utilization of enhanced optical potential at a selected interface.
Both mechanisms may work individually, or together, to increase the probability
of barrier penetration.Comment: 9 pages, 3 figures, Rev. 1, Significantly enhanced version (resulting
from reviewer's comments), Rev. 2, embedded font and smaller file size.
Keywords: CMNS, D--D+, LENR, optical-potential, resonance-enhancemen
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