Regensburg 2019 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 42: Nano- and Optomechanics
TT 42.3: Talk
Wednesday, April 3, 2019, 11:15–11:30, H7
In situ tunable string resonators in a network — •Daniel Schwienbacher1,2,3, Thomas Luschmann1,2, Rudolf Gross1,2,3, and Hans Huebl1,2,3 — 1Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften, Garching, Germany — 2Physik-Department, Technische Universität München, Garching, Germany — 3Nanosystems Initiative Munich (NIM), München, Germany
Mechanical resonator networks are currently discussed in the context of model systems giving insight to condensed matter problems including topology[1]. Here, we discuss networks based on three high-Q nanomechanical string resonators (nanostrings) made from highly tensile stressed Si3N4. The strings are strongly coupled via shared support structures and thus can form a fully mechanical, classical multi-level system. Moreover, the individual strings are tunable in frequency [2], which allows to investigate their coupling dynamics using continuous wave and time domain techniques. In particular, such systems allow the experimental explorations of quantum classical analogies such as Landau-Zener dynamics[3,4].
We extend the previous work performed on two coupled strings to three resonators and discuss the additional features of the inter string dynamics, such as the classical analog of Landau-Zener dynamics in a three mode system and the observation of dark states.
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