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Beating the limits with initial correlations
(2017-11-28)
Fast and reliable reset of a qubit is a key prerequisite for any quantum technology. For real world open quantum systems undergoing non-Markovian dynamics, reset implies not only purification, but in particular erasure of initial correlations between qubit and environment. Here, we derive optimal reset protocols using a combination of geometric and numerical control theory. For factorizing initial states, we find a lower limit for the entropy reduction of the qubit as well as a speed limit. The time-optimal solution ...
Dissertation
Optimierung von Nanostrukturen in Dielektrika für biomedizinische und technische Applikationen durch zeitlich geformte Femtosekunden-Laserpulse
(2017-09-28)
Das Ablationsverhalten von Dielektrika wird in Abhängigkeit von unterschiedlich zeitlich geformten Femtosekunden-Laserpulsen analysiert. Dabei entstehen unterschiedlich tiefe Strukturen im Nano- und Mikrometerbereich. In zwei Anwendungsbeispielen wird deren Anwendbarkeit für biomedizinische und technische Applikationen beschrieben.
Dissertation
Development of UNCD-based multielectrode arrays for neuronal measurements
(2017-07-26)
The work in hand will show how some of diamond’s extraordinary features can be utilized in bio-applications especially for in vitro cultures of neuronal cells. Diamond has proven itself as an excellent material for bio-applications such as simple fluorescent microarrays over bioFET (field effect transistor) to bioMEMS (microelectro-mechanical systems). The reason does not only lie in its best known properties namely extreme hardness and high refractive index, but in its unique chemistry. As one of the modifications ...