4 papers
Identification and optimal control strategies for the transversal splitting of ultra--cold Bose gases
Nikolaus Würkner, Yevhenii Kuriatnikov, Karthikeyan Kumaran +5
Splitting a Bose--Einstein condensate (BEC) is a key operation in fundamental physics experiments and emerging quantum technologies, where precise preparation of well--defined init…
Fast Coherent Splitting of Bose-Einstein Condensates
Yevhenii Kuriatnikov, Nikolaus Würkner, Karthikeyan Kumaran +6
Preparation of non-trivial quantum states without introducing unwanted excitations or decoherence remains a central challenge in utilizing ultracold atomic systems for quantum simu…
Stabilizing nanoparticles in the intensity minimum: feedback levitation on an inverted potential
Salambô Dago, Jakob Rieser, Mario A. Ciampini +5
We demonstrate the stable trapping of a levitated nanoparticle on top of an inverted potential using a combination of optical readout and electrostatic control. The feedback levita…
Optimal Sensing of Momentum Kicks with a Feedback-Controlled Nanomechanical Resonator
Kaspar Schmerling, Hajrudin Bešić, Andreas Kugi +2
External disturbances exciting a mechanical resonator can be exploited to gain information on the environment. Many of these interactions manifest as momentum kicks, such as the re…