Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Kotthaus, Joerg P."'
Autor:
Kotthaus, Jörg P.
Stimulated by ongoing discussions about the relevance of mechanical motion in the propagation of nerve signals capillary waves of water-based electrolytes in elastic tubular systems are considered as an essential ingredient. Their propagation velocit
Externí odkaz:
http://arxiv.org/abs/1909.06313
Autor:
Dietl, Sebastian, Wang, Sheng, Schuh, Dieter, Wegscheider, Werner, Kotthaus, Jörg P., Pinczuk, Aron, Holleitner, Alexander W., Wurstbauer, Ursula
Photogenerated excitonic ensembles confined in coupled GaAs quantum wells are probed by a complementary approach of emission spectroscopy and resonant inelastic light scattering. Lateral electrostatic trap geometries are used to create dense systems
Externí odkaz:
http://arxiv.org/abs/1612.04072
Autor:
Seitner, Maximilian J., Ribeiro, Hugo, Kölbl, Johannes, Faust, Thomas, Kotthaus, Jörg P., Weig, Eva M.
Publikováno v:
Phys. Rev. B 94, 245406 (2016)
The transition from classical to quantum mechanics has intrigued scientists in the past and remains one of the most fundamental conceptual challenges in state-of-the-art physics. Beyond the quantum mechanical correspondence principle, quantum-classic
Externí odkaz:
http://arxiv.org/abs/1602.01034
Autor:
Repp, Jens, Schinner, Georg J., Schubert, Enrico, Rai, Ashish K., Reuter, Dirk, Wieck, Andreas D., Wurstbauer, Ursula, Kotthaus, Joerg P., Holleitner, Alexander W.
We introduce a confocal shift-interferometer based on optical fibers. The presented spectroscopy allows measuring coherence maps of luminescent samples with a high spatial resolution even at cryogenic temperatures. We apply the spectroscopy onto elec
Externí odkaz:
http://arxiv.org/abs/1411.5358
Autor:
Pernpeintner, Matthias, Faust, Thomas, Hocke, Fredrik, Kotthaus, Jörg P., Weig, Eva M., Huebl, Hans, Gross, Rudolf
Publikováno v:
Appl. Phys. Lett. 105, 123106 (2014)
We have realized a nano-electromechanical hybrid system consisting of a silicon nitride beam dielectrically coupled to a superconducting microwave resonator. We characterize the sample by making use of the Duffing nonlinearity of the strongly driven
Externí odkaz:
http://arxiv.org/abs/1407.6907
Publikováno v:
Phys. Rev. B 89, 100102(R) (2014)
The damping rates of high quality factor nanomechanical resonators are well beyond intrinsic limits. Here, we explore the underlying microscopic loss mechanisms by investigating the temperature-dependent damping of the fundamental and third harmonic
Externí odkaz:
http://arxiv.org/abs/1310.3671
The Bloch sphere is a generic picture describing a coupled two-level system and the coherent dynamics of its superposition states under control of electromagnetic fields. It is commonly employed to visualise a broad variety of phenomena ranging from
Externí odkaz:
http://arxiv.org/abs/1212.3172
Publikováno v:
Appl. Phys. Lett. 101, 103110 (2012)
We present an integrated scheme for dielectric drive and read-out of high-Q nanomechanical resonators which enables tuning of both the resonance frequency and quality factor with an applied DC voltage. A simple model for altering these quantities is
Externí odkaz:
http://arxiv.org/abs/1207.2403
Autor:
Faust, Thomas, Rieger, Johannes, Seitner, Maximilian J., Krenn, Peter, Kotthaus, Jörg P., Weig, Eva M.
Publikováno v:
Phys. Rev. Lett. 109, 037205 (2012)
The Landau-Zener transition is a fundamental concept for dynamical quantum systems and has been studied in numerous fields of physics. Here we present a classical mechanical model system exhibiting analogous behaviour using two inversely tuneable, st
Externí odkaz:
http://arxiv.org/abs/1201.4083
Autor:
Stallhofer, Markus, Kastl, Christoph, Brändlein, Marcel, Schuh, Dieter, Wegscheider, Werner, Kotthaus, Jörg. P., Abstreiter, Gerhard, Holleitner, Alexander
We exploit GaAs-based quantum point contacts as mesoscopic detectors to analyze the ballistic flow of photogenerated electrons in a two-dimensional electron gas at a perpendicular magnetic field. Whereas charge transport experiments always measure th
Externí odkaz:
http://arxiv.org/abs/1201.3333