5,509 research outputs found
Reply to Comments of Steuernagel on the Afshar's Experiment
We respond to criticism of our paper "Paradox in Wave-Paricle Duality for
Non-Perturbative Measurements". We disagree with Steuernagel's derivation of
the visibility of the Afshar experiment. To calculate the fringe visibility,
Steuernagel utilizes two different experimental situations, i.e. the wire grid
in the pattern minima and in the pattern maxima. In our assessment, this
proceduere cannot lead to the correct result for the complementarity properties
of wave-particle in one particular experimental set-up
Self-compensation in phosphorus-doped CdTe
We investigate the self-compensation mechanism in phosphorus-doped CdTe. The
formation energies, charge transition levels, and defects states of several
P-related point defects susceptible to cause self-compensation are addressed by
first-principles calculations. Moreover, we assess the in uence of the
spin-orbit coupling and supercell-size effects on the stability of AX centers
donors, which are believed to be responsible for most of the self-compensation.
We report an improved result for the lowest-energy configuration of the P
interstitial (P) and find that the self-compensation mechanism is
not due to the formation of AX centers. Under Te-rich growth conditions,
(P) exhibits a formation energy lower than the substitutional
acceptor (P) when the Fermi level is near the valence band, acting
as compensating donor. While, for Cd-rich growth conditions, our results
suggest that p-type doping is limited by the formation of
(P-V) complexes.Comment: 5 page
Particle Mediated Quantum Effects
We analyze an experiment that consists of two statistically independent laser
beams that cross, separate and end at detectors. At the beam intersection there
is a thin wire at the center of a presumed dark interference fringe. Since
photon count at end detectors is similar with or without the wire in place,
wave visibility is maximum V=1. With the wire at the center of a dark fringe,
classical wire diffraction is insignificant; thus, photons maintain their
direction, which implies that there is a high level of particle which-way
information, K=1. Since K^2+V^2=2, it appears that the complementarity
inequality, K^2+V^2 smaller or equal 1, is violated. We find that there is no
violation provided that virtual particles are included in the analysis of the
complementarity inequality. We propose that virtual particles are a key
component of the mechanism that explains how quantum effects work.Comment: References have been update
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