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The physics of solid-state nanostructures is governed by the fact that materials properties change drastically when spatial dimensions are reaching the deBroglie wavelength of electrons. During the last decade, completely new functionalities have been achieved by exploiting these effects. On the other side, a comparable control in the fourth dimension, time, is still missing since it demands to manipulate...
Quantum information science has shown that harnessing quantum mechanical effects can dramatically improve performance for certain tasks in communication, computation and measurement. Already a number of photonic quantum circuits have been realized for quantum metrology, lithography and quantum logic gates. However, these demonstrations have relied on large-scale (bulk) optical elements bolted to large...
Ultrafast laser pulses can be used for fast quantum gates and entangling gates offering an alternative method to scale quantum computing systems. We implement fundamental components of these entangling gates
Summary form only given. Optical imaging in scattering media has generated much interest in recent years because of its potential as a diagnostic tool in medicine. We have developed a femtosecond optical parametric amplifier (OPA) and applied it to detect unscattered or backscattered photons, which have travelled through a scattering medium made of nanospheres of latex in water. In conclusion we demonstrated...
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