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Quantum interference and entanglement induced by multiple scattering of light
We report on the effects of quantum interference induced by transmission of
an arbitrary number of optical quantum states through a multiple scattering
medium. We identify the role of quantum interference on the photon correlations
and the degree of continuous variable entanglement between two output modes. It
is shown that the effect of quantum interference survives averaging over all
ensembles of disorder and manifests itself as increased photon correlations
giving rise to photon anti-bunching. Finally, the existence of continuous
variable entanglement correlations in a volume speckle pattern is predicted.
Our results suggest that multiple scattering provides a promising way of
coherently interfering many independent quantum states of light of potential
use in quantum information processing.Comment: 5 pages including 4 figure
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Fabrication of Bone Substitute Material by Rapid Prototyping
Bone tissue engineering has gained much attention in recent years. A key requirement in this
field is the development of scaffold structures, on which cells adhere. This can be done by
fabricating scaffolds by direct procedures like 3D-printing or by indirect procedures like casting.
With the 3D-printing process different structures were build up by using hydroxyapatite powder
(HA) and a special binder material. Afterwards the printed 3D structures were sintered.
For the casting process molds have been made of different resins by stereolithography and other
processes using polymers and waxes. These structures were filled by a suspension of HA. By
heating the resulting polymer/ceramic composite to a specific temperature it is possible to
combust the polymer or wax. By further heating the remaining body, the HA is sintered.
Compared to the 3D printing a better resolution can be obtained here. But there are restrictions
regarding the ratio of polymer and the HA ceramic during the heating process which means a
limitation for the level of porosity.Mechanical Engineerin
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